IRQ-5/20-T110NF-C [MURATA]

民用设备,工业设备;
IRQ-5/20-T110NF-C
型号: IRQ-5/20-T110NF-C
厂家: muRata    muRata
描述:

民用设备,工业设备

文件: 总28页 (文件大小:2132K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
IRQ Series  
Encapsulated Quarter-Brick 100-Watt Isolated DC-DC Converter  
Output Voltage (V)  
Output Current (A)  
Input Voltage (V)  
5
12  
24  
20  
8.3  
4.2  
110  
110  
110  
Optimized for harsh environments in industrial/railway applications, the IRQ  
DC-DC converter series offer regulated outputs in an industry-standard  
quarter brick fully encased package.  
FEATURES  
PRODUCT OVERVIEW  
DC input range: 57.6-160V  
The IRQ series regulated converter module  
deliver a 5V, 12V or 24V output @ Vin = 57.6  
– 160 Vdc in an industry standard quarter  
brick fully encased package at astonishing  
efficiency. The fully isolated (3000Vdc) IRQ  
series accept a 57.6 to 160 Volt DC input  
voltage range with a reinforced insulation  
system. Typical applications include  
industrial, railway and transportation  
applications.  
The IRQ’s synchronous-rectifier topology and  
fixed frequency operations means excellent  
efficiencies. A wealth of electronic protection  
features include input under voltage lockout,  
over voltage lockout protection, output  
current limit, current sharing, short circuit  
hiccup, Vout overshoot, and over temperature  
shutdown.  
Available options include various pin lengths  
and flanged baseplate. The IRQ series is  
designed to meet all UL and IEC emissions,  
safety, and flammability certifications.  
(Covers both 96V and 110V input range)  
Encapsulated circuitry for optimal thermal/vibration  
performance  
Regulation: 0.3% from no load to full load  
High Efficiency  
Maximum baseplate operating temperature: 110ºC,  
full load  
Over-current & Over-temperature protection  
Synchronous rectifier topology  
Stable no-load operation  
Support Pre-Bias startup  
SAFETY FEATURES  
Reinforced insulation  
3000Vdc input to output isolation  
EN 50155  
UL 60950-1 (Pending)  
CAN/CSA-C22.2 No. 60950-1 (Pending)  
EN 60950-1  
Slotted / Flanged Baseplate  
“V” Option Pins / Pinout  
Pin Dia : 0.080  
RoHS compliant  
Slotted / Flanged Baseplate  
DOSA Pins / Pinout  
Pin Dia : 0.040 / 0.060  
Standard Baseplate  
DOSA Pins / Pinout  
Pin Dia : 0.040 / 0.060  
For full details go to  
www.murata-ps.com/rohs  
www.murata-ps.com/support  
SDC_IRQ_A01.D06 Page 1 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ②  
Output  
Input  
Efficiency  
Ripple & Noise  
Total  
Power  
(W)  
Root Model ①  
Regulation (max.)  
VOUT IOUT  
(V) (A, max)  
VIN Nom.  
(V)  
Range  
(V)  
IIN, no load IIN, full load  
(mVp-p)  
(mA)  
(A)  
Typ.  
Max.  
150  
120  
240  
Line  
Load  
0.ꢁꢀ  
0.5ꢀ  
0.ꢁꢀ  
Min.  
Typ.  
IRQ-5/20-T110  
IRQ-12/8.ꢁ-T110  
IRQ-24/4.2-T110  
5
20  
8.ꢁ  
4.2  
100  
100  
100  
80  
50  
0.2ꢀ  
0.6ꢀ  
0.ꢁꢀ  
110  
110  
110  
57.6-160  
57.6-160  
57.6-160  
150  
50  
2.06  
2.50  
2.50  
8ꢁ.0ꢀ  
87.0ꢀ  
86.5ꢀ  
85.5ꢀ  
87.4ꢀ  
88.2ꢀ  
12  
24  
100  
20  
Please refer to the part number structure for additional options and complete ordering part numbers.  
All specifications are at nominal line voltage and full load, +25 ºC. Unless otherwise noted. See detailed specifications. Output capacitors are 1 μF ceramic in parallel with 10 μF  
electrolytic. I/O caps are necessary for our test equipment and may not be needed for your application.  
Part Number Structure  
Note: Please see mechanical drawings for details. Special order applies to Positive Logic version. Some model number combinations may not be  
available. See website or contact your local Murata sales representative.  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 2 of 28  
 
 
 
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
IRQ SERIES FUNCTIONAL SPECIFICATIONS  
ABSOLUTE MAXIMUM RATINGS  
Conditions  
Minimum  
Typical/Nominal  
Maximum  
160  
Units  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
°C  
Input Voltage, Continuous  
0
Input Voltage, Transient  
Isolation Voltage  
100 mS max. duration  
Input to output  
170  
3000  
1500  
500  
Input to Baseplate  
Output to Baseplate  
Referred to -Vin  
On/Off Remote Control  
0
15  
Operating Temperature Range  
Storage Temperature Range  
Ambient Temperature  
Baseplate Temperature  
-40  
-55  
85  
125  
°C  
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other  
than those listed in the Performance/Functional Specifications Table is not implied nor recommended.  
INPUT  
Operating Input Voltage Range  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
Lockout Voltage Hysteresis  
0
160  
57  
Vdc  
Vdc  
Vdc  
Vdc  
52  
50  
54.5  
52  
56  
TBD  
Recommended External Input  
Capacitance  
TBD  
uF  
FEATURES and OPTIONS  
Conditions  
Minimum  
Typical/Nominal  
Maximum  
Units  
Primary On/Off control (designed to be driving with an open collector logic, Voltages referenced to -Vin)  
“P” suffix:  
Positive Logic, ON state  
Positive Logic, OFF state  
Control Current  
ON = pin open or external voltage  
OFF = ground pin or external voltage  
open collector/drain  
3.5  
0
15  
1
V
V
1
2
mA  
“N” suffix:  
Negative Logic, ON state  
Negative Logic, OFF state  
Control Current  
ON = ground pin or external voltage  
OFF = pin open or external voltage  
open collector/drain  
-0.1  
2.5  
0.8  
15  
2
V
V
1
5
mA  
Sense pins connected externally to  
respective Vout pins  
Remote Sense Compliance  
%
ENVIRONMENTAL  
Operating Ambient Temperature  
Ambient Temperature  
Baseplate Temperature  
-40  
-40  
-55  
85  
°C  
°C  
°C  
°C  
°C  
°C  
110  
125  
125  
Storage Temperature  
Semiconductor Junction Temperature  
Thermal Protection  
Average PCB Temperature  
125  
Thermal Protection Restart Hysteresis  
Electromagnetic Interference  
Conducted, EN55022/CISPR22  
RoHS rating  
External filter required; see  
Emissions performance test.  
B
Class  
RoHS-6  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
IRQ SERIES FUNCTIONAL SPECIFICATIONS  
GENERAL and SAFETY  
Insulation Safety Rating  
Isolation Resistance  
Isolation Capacitance  
Reinforced  
10  
MΩ  
pF  
500  
Certified to UL-60950-1, CSA-C22.2  
Safety  
No.60950-1, IEC/EN60950-1, 2nd edition  
(pending)  
Yes  
MECHANICAL  
Conditions  
Minimum  
Typical/Nominal  
0.06 & 0.04  
1.524 & 1.016  
0.08  
Maximum  
Units  
Inches  
mm  
Through Hole Pin Diameter  
Standard:Option#2  
Inches  
mm  
Option#1  
2.032  
Through Hole Pin Material  
Copper alloy  
98.4-299  
TH Pin Plating Metal and Thickness  
Nickel subplate  
Gold overplate  
µ-inches  
µ-inches  
4.7-19.6  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 4 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-5/20-T110)  
INPUT  
Conditions  
Minimum  
Typical/Nominal  
Maximum  
Units  
Input current  
Full Load Conditions  
Low Line input current  
Inrush Transient  
Vin = nominal  
Vin = minimum  
Vin = 110v  
1.06  
2.01  
0.1  
1.11  
2.06  
0.2  
A
A
A2-Sec.  
A
Short Circuit input current  
No Load input current  
0.1  
0.2  
Iout = minimum, unit=ON  
50  
150  
mA  
Shut-Down input current (Off, UV,  
OT)  
15  
Pi  
30  
mA  
Measured at the input of module with a  
simulated source impedance of 12µH,  
220µF, 450V, across source, 33µF, 250V  
external capacitors across input pins.  
Back Ripple Current  
2000  
mAp-p  
Internal Filter Type/Value  
Recommended Input fuse  
OUTPUT  
5
A
Total Output Power  
Voltage  
0
100  
5
101  
W
Setting Accuracy  
Output Adjust Range  
Overvoltage Protection  
Current  
At 100% load, no trim, all conditions  
4.95  
4.950  
6
5.05  
5.050  
6.5  
Vdc  
Vdc  
Vdc  
6.3  
Output Current Range  
Minimum Load  
0
20  
0
20  
30  
A
A
Current Limit Inception  
Short Circuit  
cold condition  
22  
25  
Hiccup technique - Auto recovery within  
1.25% of Vout  
Short Circuit Current  
2.0  
4.0  
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Hiccup current limiting  
Continuous  
Non-latching  
Line Regulation  
Vin = 57.6-160, Vout = nom., full load  
Iout = min. to max., Vin = nom.  
20 MHz BW, Cout = 1µF  
paralleled with 10µF  
0.2  
0.3  
%
%
Load Regulation  
Ripple and Noise  
80  
150  
mV pk-pk  
Temperature Coefficient  
At all outputs  
0.02  
% of Vnom./°C  
Maximum Output Capacitance  
(Loads : CR mode)  
3300  
3300  
μF  
μF  
(Loads : CC mode)  
GENERAL and SAFETY  
Efficiency  
Vin=110V, full load  
83  
85.5  
%
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 5 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-5/20-T110)  
Isolation Resistance  
10  
MΩ  
pF  
Isolation Capacitance  
500  
Per Telcordia SR-332, Issue 2, Method 1,  
Class 1, Ground Fixed, Tcase=+25°C  
Calculated MTBF  
1800  
200  
Hours x 103  
DYNAMIC CHARACTERISTICS  
Switching Frequency  
KHz  
Turn On Time  
Vin On to Vout Regulated  
Remote On to Vout Regulated  
Vout Rise Time  
20  
30  
mS  
mS  
TBD  
TBD  
From 0ꢀ~100ꢀ  
15  
30  
50  
mS  
µSec  
mV  
Dynamic Load Response  
Dynamic Load Peak Deviation  
MECHANICAL  
50-75-50%, 1A/us, within 1% of Vout  
same as above  
100  
Typical/Nominal  
2.28x 1.45 x 0.5  
57.91x36.83x 12.7  
2.23  
300  
Conditions  
Minimum  
Maximum  
Units  
Inches  
mm  
Outline Dimensions (with baseplate)  
Weight (with baseplate)  
Ounces  
Grams  
63.6  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 6 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-5/20-T110)  
90  
85  
80  
75  
70  
65  
60  
55  
50  
25  
20  
15  
10  
5
57.5V  
110V  
160V  
0
40  
50  
60  
70  
80  
90  
100  
110  
2
4
6
8
10  
12  
14  
16  
18  
20  
Baseplate Temperature ()  
Iout(A)  
Efficiency vs. Load Current  
Thermal Derating vs. Baseplate temperature  
Turn-on transient at zero load current  
(20 mS/div, Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF, 2V/div)  
Turn-on transient at full load current  
(20 mS/div, Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF, 2V/div)  
Turn-on transient at zero load current  
Turn-on transient at full load current  
(50 mS/div, Top Trace: Vout, 2V/div; Bottom Trace: Vin, 50V/div)  
(50 mS/div, Top Trace: Vout, 2V/div; Bottom Trace: Vin, 50V/div)  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 7 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-5/20-T110)  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 0, Cload = 0, ScopeBW = 20MHz )  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 20A, Cload = 0, ScopeBW = 20MHz )  
18  
57.6V  
16  
110V  
160V  
14  
12  
10  
8
6
4
2
0
0.00  
5.00  
10.00  
15.00  
20.00  
Load Current (A)  
Step Load Transient Response@25ºC  
(Vin = 110V, Vout = nom., Iout= 75-50-75% of full load, Cload = 0µF, ScopeBW =20MHz )  
Power Dissipation vs. Load Current @25ºC  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 8 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Thermal Derating (IRQ-5/20-T110, Unit mounted on a 10 X 10 inch PCB)  
TRANSVERSE (AIRFLOW FROM Vin- TO Vin+)  
LONGITUDINAL (AIRFLOW FROM Vin TO Vout)  
25  
25  
20  
20  
600 LFM  
600 LFM  
15  
15  
500 LFM  
500 LFM  
400 LFM  
400 LFM  
10  
10  
ꢁ00 LFM  
ꢁ00 LFM  
200 LFM  
200 LFM  
5
5
100 LFM  
100 LFM  
0
0
40  
40  
40  
50  
60  
70  
80  
80  
80  
40  
40  
40  
50  
60  
70  
80  
85  
85  
85  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 57.6V)  
Maximum Current Temperature Derating (Vin = 57.6V)  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
0
0
50  
60  
70  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 110V)  
Maximum Current Temperature Derating (Vin = 110V)  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
0
0
50  
60  
70  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Derating (Vin = 160V)  
Maximum Current Derating (Vin = 160V)  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 9 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-12/8.ꢁ-T110)  
INPUT  
Conditions  
Minimum  
Typical/Nominal  
Maximum  
Units  
Input current  
Full Load Conditions  
Low Line input current  
Inrush Transient  
Vin = nominal  
Vin = minimum  
Vin = 110v  
1.00  
1.98  
0.1  
1.50  
2.50  
0.2  
A
A
A2-Sec.  
A
Short Circuit input current  
No Load input current  
0.02  
7
0.05  
50  
Iout = minimum, unit=ON  
mA  
Shut-Down input current (Off, UV,  
OT)  
5
50  
mA  
Measured at the input of module with a  
simulated source impedance of 12µH,  
220µF, 450V, across source, 33µF, 250V  
external capacitors across input pins.  
Back Ripple Current  
600  
mAp-p  
Internal Filter Type/Value  
Recommended Input fuse  
OUTPUT  
Pi  
10  
A
Total Output Power  
Voltage  
0
99.60  
12  
100.60  
W
Setting Accuracy  
Output Adjust Range  
Overvoltage Protection  
Current  
At 100% load, no trim, all conditions  
11.88  
10.8  
14  
12.12  
13.2  
18  
Vdc  
Vdc  
Vdc  
16  
Output Current Range  
Minimum Load  
0
8.30  
0
8.30  
A
A
Current Limit Inception  
Short Circuit  
cold condition  
9.13  
10.50  
12.45  
Hiccup technique - Auto recovery within  
1.25% of Vout  
Short Circuit Current  
1.4  
3
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Hiccup current limiting  
Continuous  
Non-latching  
Line Regulation  
Vin = 57.6-160, Vout = nom., full load  
Iout = min. to max., Vin = nom.  
20 MHz BW, Cout = 1µF  
paralleled with 10µF  
0.6  
0.5  
%
%
Load Regulation  
Ripple and Noise  
50  
120  
mV pk-pk  
Temperature Coefficient  
At all outputs  
0.02  
1000  
1000  
% of Vnom./°C  
Maximum Output Capacitance  
(Loads : CR mode)  
μF  
μF  
(Loads : CC mode)  
GENERAL and SAFETY  
Efficiency  
Vin=110V, full load  
87  
87.4  
%
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 10 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-12/8.ꢁ-T110)  
Isolation Resistance  
10  
MΩ  
pF  
Isolation Capacitance  
500  
Per Telcordia SR-332, Issue 2, Method 1,  
Class 1, Ground Fixed, Tcase=+25°C  
Calculated MTBF  
1800  
200  
Hours x 103  
DYNAMIC CHARACTERISTICS  
Switching Frequency  
KHz  
Turn On Time  
Vin On to Vout Regulated  
Remote On to Vout Regulated  
Vout Rise Time  
18  
30  
mS  
mS  
TBD  
TBD  
From 0ꢀ~100ꢀ  
10  
400  
25  
600  
mS  
µSec  
mV  
Dynamic Load Response  
Dynamic Load Peak Deviation  
MECHANICAL  
50-75-50%, 1A/us, within 1% of Vout  
same as above  
200  
300  
Conditions  
Minimum  
Typical/Nominal  
2.28x 1.45 x 0.50  
57.91x36.83x 12.7  
2.23  
Maximum  
Units  
Inches  
mm  
Outline Dimensions (with baseplate)  
Weight (with baseplate)  
Ounces  
Grams  
63.6  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 11 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-12/8.ꢁ-T110)  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
9
8
7
6
5
4
2
1
0
57.6V  
110V  
160V  
40  
50  
60  
70  
80  
90  
100  
110  
Baseplate Temperature ()  
0.917 1.7ꢁ 2.57 ꢁ.ꢁ8 4.22 5.0ꢁ 5.88 6.71 7.52 8.ꢁ6  
Iout(A)  
Thermal Derating vs. Baseplate temperature  
Efficiency vs. Load Current  
Turn-on transient at zero load current  
Turn-on transient at full load current  
(10 mS/div, Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF, 2V/div)  
(10 mS/div, Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF, 2V/div)  
Turn-on transient at zero load current  
Turn-on transient at full load current  
(10 mS/div, Top Trace: Vout, 5V/div; Bottom Trace: Vin, 50V/div)  
(10 mS/div, Top Trace: Vout, 5V/div; Bottom Trace: Vin, 50V/div)  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 12 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-12/8.ꢁ-T110)  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 0, Cload = 0, ScopeBW = 20MHz )  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 8.3A, Cload = 0, ScopeBW = 20MHz )  
16  
57.6V  
14  
110V  
12  
160V  
10  
8
6
4
2
0
0.00 1.00 2.00 ꢁ.00 4.00 5.00 6.00 7.00 8.00 9.00  
Load Current (A)  
Step Load Transient Response@25ºC  
(Vin = 110V, Vout = nom., Iout= 75-50-75% of full load, Cload = 0µF, ScopeBW =20MHz )  
Power Dissipation vs. Load Current @25ºC  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 1ꢁ of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Thermal Derating (IRQ-12/8.ꢁ-T110, Unit mounted on a 10 X 10 inch PCB)  
TRANSVERSE (AIRFLOW FROM Vin- TO Vin+)  
LONGITUDINAL (AIRFLOW FROM Vin TO Vout)  
9
8
7
9
8
7
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
6
5
4
2
1
0
6
5
4
2
1
0
ꢁ0  
ꢁ0  
ꢁ0  
40  
50  
60  
70  
80  
85  
85  
85  
ꢁ0  
ꢁ0  
ꢁ0  
40  
50  
60  
70  
80  
85  
85  
85  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 57.6V)  
Maximum Current Temperature Derating (Vin = 57.6V)  
9
8
7
6
5
4
2
1
0
9
8
7
6
5
4
2
1
0
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
40  
50  
60  
70  
80  
40  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 110V)  
Maximum Current Temperature Derating (Vin = 110V)  
9
8
7
6
5
4
2
1
0
9
8
7
6
5
4
2
1
0
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
40  
50  
60  
70  
80  
40  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Derating (Vin = 160V)  
Maximum Current Derating (Vin = 160V)  
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SDC_IRQ.A01.D06 Page 14 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-24/4.2-T110)  
INPUT  
Conditions  
Minimum  
Typical/Nominal  
Maximum  
Units  
Input Current  
Full Load Conditions  
Low Line input current  
Inrush Transient  
Vin = nominal  
Vin = minimum  
Vin = 110v  
1.00  
2.02  
0.1  
1.50  
2.50  
0.2  
A
A
A2-Sec.  
A
Short Circuit input current  
No Load input current  
0.03  
7
0.05  
20  
Iout = minimum, unit=ON  
mA  
Shut-Down input current (Off, UV,  
OT)  
5
20  
mA  
Measured at the input of module with a  
simulated source impedance of 12µH,  
220µF, 450V, across source, 33µF, 250V  
external capacitors across input pins.  
Back Ripple Current  
500  
mAp-p  
Internal Filter Type/Value  
Recommended Input fuse  
OUTPUT  
Pi  
10  
A
Total Output Power  
Voltage  
0
100.80  
24  
101.81  
W
Setting Accuracy  
Output Adjust Range  
Overvoltage Protection  
Current  
At 100% load, no trim, all conditions  
23.76  
21.6  
28.8  
24.24  
26.4  
36  
Vdc  
Vdc  
Vdc  
32  
Output Current Range  
Minimum Load  
0
4.20  
0
4.20  
6.30  
A
A
Current Limit Inception  
Short Circuit  
cold condition  
4.62  
5.67  
Hiccup technique - Auto recovery within  
1.25% of Vout  
Short Circuit Current  
1.4  
3
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Hiccup current limiting  
Continuous  
Non-latching  
Line Regulation  
Vin = 57.6-160, Vout = nom., full load  
Iout = min. to max., Vin = nom.  
20 MHz BW, Cout = 1µF  
paralleled with 10µF  
0.2  
0.3  
%
%
Load Regulation  
Ripple and Noise  
100  
240  
mV pk-pk  
Temperature Coefficient  
At all outputs  
0.02  
560  
560  
% of Vnom./°C  
Maximum Output Capacitance  
(Loads : CR mode)  
μF  
μF  
(Loads : CC mode)  
GENERAL and SAFETY  
Efficiency  
Vin=110V, full load  
86.5  
88.2  
%
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SDC_IRQ.A01.D06 Page 15 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
FUNCTIONAL SPECIFICATIONS (IRQ-24/4.2-T110)  
Isolation Resistance  
10  
MΩ  
pF  
Isolation Capacitance  
500  
Per Telcordia SR-332, Issue 2, Method 1,  
Class 1, Ground Fixed, Tcase=+25°C  
Calculated MTBF  
1800  
200  
Hours x 103  
DYNAMIC CHARACTERISTICS  
Switching Frequency  
KHz  
Turn On Time  
Vin On to Vout Regulated  
Remote On to Vout Regulated  
Vout Rise Time  
18  
30  
mS  
mS  
TBD  
TBD  
From 0ꢀ~100ꢀ  
10  
300  
25  
500  
mS  
µSec  
mV  
Dynamic Load Response  
Dynamic Load Peak Deviation  
MECHANICAL  
50-75-50%, 1A/us, within 1% of Vout  
same as above  
400  
600  
Conditions  
Minimum  
Typical/Nominal  
2.28x 1.45 x 0.5  
57.91x36.83x 12.7  
2.23  
Maximum  
Units  
Inches  
mm  
Outline Dimensions (with baseplate)  
Weight (with baseplate)  
Ounces  
Grams  
63.6  
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SDC_IRQ.A01.D06 Page 16 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-24/4.2-T110)  
4.5  
4
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
ꢁ.5  
2.5  
2
57.6V  
110V  
160V  
1.5  
1
0.5  
0
40  
50  
60  
70  
80  
90  
100  
110  
0.5  
0.9  
1.2  
1.6  
2.0  
2.4  
2.8  
ꢁ.2  
ꢁ.5  
ꢁ.9  
Baseplate Temperature ()  
Iout(A)  
Efficiency vs. Load Current  
Thermal Derating vs. Baseplate temperature  
Turn-on transient at zero load current  
(10 mS/div, Top Trace: Vout, 10V/div; Bottom Trace: ON/OFF, 2V/div)  
Turn-on transient at full load current  
(10 mS/div, Top Trace: Vout, 10V/div; Bottom Trace: ON/OFF, 2V/div)  
Turn-on transient at zero load current  
Turn-on transient at full load current  
(10 mS/div, Top Trace: Vout, 10V/div; Bottom Trace: Vin, 50V/div)  
(10 mS/div, Top Trace: Vout, 10V/div; Bottom Trace: Vin, 50V/div)  
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SDC_IRQ.A01.D06 Page 17 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
PERFORMANCE DATA (IRQ-24/4.2-T110)  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 0, Cload = 0, ScopeBW = 20MHz )  
Ripple and Noise @25ºC  
(Vin = 110V, Vout = nom., Iout= 4.2A, Cload = 0, ScopeBW = 20MHz )  
16  
57.6V  
14  
110V  
12  
160V  
10  
8
6
4
2
0
0.00  
1.00  
2.00  
ꢁ.00  
4.00  
Load Current (A)  
Step Load Transient Response@25ºC  
(Vin = 110V, Vout = nom., Iout= 75-50-75% of full load, Cload = 0µF, ScopeBW =20MHz )  
Power Dissipation vs. Load Current @25ºC  
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SDC_IRQ.A01.D06 Page 18 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Thermal Derating (IRQ-24/4.2-T110, Unit mounted on a 10 X 10 inch PCB)  
TRANSVERSE (AIRFLOW FROM Vin- TO Vin+)  
LONGITUDINAL (AIRFLOW FROM Vin TO Vout)  
4.5  
4
4.5  
4
ꢁ.5  
ꢁ.5  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
2.5  
2
2.5  
2
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
1.5  
1
1.5  
1
0.5  
0
0.5  
0
ꢁ0  
ꢁ0  
ꢁ0  
40  
50  
60  
70  
80  
85  
85  
85  
ꢁ0  
ꢁ0  
ꢁ0  
40  
50  
60  
70  
80  
85  
85  
85  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 57.6V)  
Maximum Current Temperature Derating (Vin = 57.6V)  
4.5  
4
4.5  
4
ꢁ.5  
ꢁ.5  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
2.5  
2
2.5  
2
1.5  
1
1.5  
1
0.5  
0
0.5  
0
50  
70  
40  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Temperature Derating (Vin = 110V)  
Maximum Current Temperature Derating (Vin = 110V)  
4.5  
4
4.5  
4
ꢁ.5  
ꢁ.5  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
600 LFM  
500 LFM  
400 LFM  
ꢁ00 LFM  
200 LFM  
100 LFM  
2.5  
2
2.5  
2
1.5  
1
1.5  
1
0.5  
0
0.5  
0
50  
70  
40  
50  
60  
70  
80  
Ambient Temperature ()  
Ambient Temperature ()  
Maximum Current Derating (Vin = 160V)  
Maximum Current Derating (Vin = 160V)  
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SDC_IRQ.A01.D06 Page 19 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
MECHANICAL SPECIFICATIONS  
Dimensions are in inches (mm) shown for ref. only.  
INPUT/OUTPUT CONNECTIONS  
Pin  
Function  
Vin(+)  
1
On/Off Control  
Vin(-)  
2
3
4
Vout(-)  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2˚  
Sense(-)  
Trim  
Sense(+)  
Vout(+)  
5
6
7
8
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SDC_IRQ.A01.D06 Page 20 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
MECHANICAL SPECIFICATIONS  
Dimensions are in inches (mm) shown for ref. only.  
INPUT/OUTPUT CONNECTIONS  
Pin  
Function  
Vin(+)  
1
On/Off Control  
Vin(-)  
2
3
4
6
Vout(-)  
Trim  
Vout(+)  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2˚  
8
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SDC_IRQ.A01.D06 Page 21 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
RECOMMENDED FOOTPRINT  
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SDC_IRQ.A01.D06 Page 22 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
STANDARDS COMPLIANCE  
Parameter  
Notes  
EN 60950-1/A12:2011  
Reinforced insulation  
UL 60950-1/R:2011-12  
CAN/CSA-C22.2 No. 60950-1/A1:2011  
IEC 61000-4-2  
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)  
Note: An external input fuse must always be used to meet these safety requirements.  
ENVIRONMENTAL QUALIFICATION TESTING  
Parameter  
# Units  
Test Conditions  
Vibration  
15  
15  
60  
15  
5
EN 61373:1999 Category I, Class B, Body mounted  
EN 61373:1999 Category I, Class B, Body mounted  
Vin nom , units at derating point,101days  
-40 °C to 125 °C, unit temp. ramp 15 °C/min.,500cycles  
Mechanical Shock  
DMTBF(Life Test)  
Temperature Cycling Test( TCT)  
Power and Temperature Cycling Test  
(PTCT)  
Temperature operating = min to max, Vin = min to max, Load=50% of rated  
maximum,100cycles  
Temperature ,Humidity and  
Bias(THB)  
85 °C85RH,Vin=max, Load=min load,1072Hour(72hours with a pre-conditioning soak,  
unpowered)  
15  
EN60068-2-30: Temperatures: + 55 °C and + 25 °C; Number of cycles: 2 (respiration  
effect);Time: 2 x 24 hours; Relative Humidity: 95%  
Damp heat test, cyclic  
Dry heat test  
15  
5
EN60068-2-2, Vin=nom line, Full load, 85°C for 6 hours.  
Vin=min to max ,95% rated load, units at derating point,500hours  
Vin=nom line, Full load,-40°C for 2 hours.  
High Temperature Operating  
Bias(HTOB)  
15  
Low Temperature operating  
5
High temperature limits, low temperature limits, Vibration limits, Combined Environmental  
Tests.  
Highly Accelerated Life Test(HALT)  
5
EMI  
3
Class A in CISSPR 22 or IEC62236-3-2(GB/T 24338.4)  
IEC 6100-4-2: +/-8kv contact discharge /+/-15kv air discharge  
EN50121-3-2  
ESD  
3
3
Surge Protection  
Solderability  
15Pins  
MIL-STD-883, method 2003 (IPC/EIA/JEDEC J-SID-002B)  
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SDC_IRQ.A01.D06 Page 2ꢁ of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Technical Notes  
Vout Start-Up Time (see Specifications) is the time interval between the  
point when the rising input voltage crosses the Start-Up Threshold and  
the fully loaded output voltage enters and remains within its specified  
accuracy band. Actual measured times will vary with input source  
impedance, external input capacitance, input voltage slew rate and final  
value of the input voltage as it appears at the converter.  
On/Off Control  
The input-side, remote On/Off Control function (pin 2) can be ordered to  
operate with either logic type:  
Negative (“N” suffix): Negative-logic devices are off when pin 2 is left  
open (or pulled high, applying +3.5V to +13V), and on when pin 2 is  
pulled low (0 to 0.8V) with respect to –Input as shown in Figure 1.  
These converters include a soft start circuit to moderate the duty  
cycle of its PWM controller at power up, thereby limiting the input inrush  
current.  
The On/Off Remote Control interval from On command to Vout (final  
5%) assumes that the converter already has its input voltage stabilized  
above the Start-Up Threshold before the On command. The interval is  
measured from the On command until the output enters and remains  
within its specified accuracy band. The specification assumes that the  
output is fully loaded at maximum rated current. Similar conditions apply  
to the On to Vout regulated specification such as external load  
capacitance and soft start circuitry.  
+VIN  
+VCC  
ON/OFF  
CONTROL  
Recommended Input Filtering  
–VIN  
The user must assure that the input source has low AC impedance to  
provide dynamic stability and that the input supply has little or no  
inductive content, including long distributed wiring to a remote power  
supply. The converter will operate with no additional external capacitance  
if these conditions are met.  
Figure 1. Driving the Negative Logic On/Off Control Pin  
Dynamic control of the remote on/off function is best accomplished  
with a mechanical relay or an open-collector/open-drain drive circuit  
(optically isolated if appropriate). The drive circuit should be able to sink  
appropriate current (see Performance Specifications) when activated and  
withstand appropriate voltage when deactivated. Applying an external  
voltage to pin 2 when no input power is applied to the converter can  
cause permanent damage to the converter.  
For best performance, we recommend installing a low-ESR capacitor  
immediately adjacent to the converter’s input terminals. The capacitor  
should be a ceramic type such as the Murata GRM32 series or a polymer  
type. Make sure that the input terminals do not go below the  
undervoltage shutdown voltage at all times. More input bulk capacitance  
may be added in parallel (either electrolytic or tantalum) if needed.  
Input Fusing  
Recommended Output Filtering  
Certain applications and/or safety agencies may require fuses at the  
inputs of power conversion components. Fuses should also be used when  
there is the possibility of sustained input voltage reversal which is not  
current-limited. For greatest safety, we recommend a fast blow fuse  
installed in the ungrounded input supply line.  
The converter will achieve its rated output ripple and noise with no  
additional external capacitor. However, the user may install more external  
output capacitance to reduce the ripple even further or for improved  
dynamic response. Again, use low-ESR ceramic (Murata GRM32 series)  
or polymer capacitors. Mount these close to the converter. Measure the  
output ripple under your load conditions.  
+Vin  
Fuse  
+Vin  
+Vout  
Use only as much capacitance as required to achieve your ripple and  
noise objectives. Excessive capacitance can make step load recovery  
sluggish or possibly introduce instability. Do not exceed the maximum  
rated output capacitance listed in the specifications.  
Rload  
Input Ripple Current and Output Noise  
All models in this converter series are tested and specified for input  
reflected ripple current and output noise using designated external  
input/output components, circuits and layout as shown in the figures  
below. The Cbus and Lbus components simulate a typical DC voltage bus.  
-Vin  
-Vin  
-Vout  
Figure 2. Input Fusing  
Output Over-Voltage Protection  
The IRQ output voltage is monitored for an over-voltage condition using a  
comparator. The signal is optically coupled to the primary side and if the  
output voltage rises to a level which could be damaging to the load, the  
sensing circuitry will power down the PWM controller causing the output  
voltage to decrease. Following a time-out period the PWM will restart,  
causing the output voltage to ramp to its appropriate value. If the fault  
condition persists, and the output voltage again climbs to excessive  
levels, the over-voltage circuitry will initiate another shutdown cycle. This  
on/off cycling is referred to as “hiccup” mode.  
Input Under-Voltage Shutdown and Start-Up Threshold  
Under normal start-up conditions, converters will not begin to regulate  
properly until the rising input voltage exceeds and remains at the Start-Up  
Threshold Voltage (see Specifications). Once operating, converters will  
not turn off until the input voltage drops below the Under-Voltage  
Shutdown Limit. Subsequent restart will not occur until the input voltage  
rises again above the Start-Up Threshold. This built-in hysteresis prevents  
any unstable on/off operation at a single input voltage.  
Start-Up Time  
Assuming that the output current is set at the rated maximum, the Vin to  
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SDC_IRQ.A01.D06 Page 24 of 28  
 
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Murata Power Solutions makes Characterization measurements in a  
closed cycle wind tunnel with calibrated airflow. We use both  
thermocouples and an infrared camera system to observe thermal  
performance. As a practical matter, it is quite difficult to insert an  
anemometer to precisely measure airflow in most applications.  
Sometimes it is possible to estimate the effective airflow if you thoroughly  
understand the enclosure geometry, entry/exit orifice areas and the fan  
flow rate specifications.  
To  
Oscilloscope  
Lbus  
Current  
Probe  
+Vin  
Vin  
Cbus  
Cin  
CAUTION: If you exceed these Derating guidelines, the converter may  
have an unplanned Over Temperature shut down. Also, these graphs are  
all collected near Sea Level altitude. Be sure to reduce the derating for  
higher altitude.  
-Vin  
Cin = 220uF, ESR < 700mΩ @ 100kHz  
Cbus = 220uF, ESR < 100mΩ @ 100kHz  
Lbus =< 500uH  
Output Fusing  
Figure ꢁ. Measuring Input Ripple Current  
The converter is extensively protected against current, voltage and  
temperature extremes. However your output application circuit may need  
additional protection. In the extremely unlikely event of output circuit  
failure, excessive voltage could be applied to your circuit. Consider using  
an appropriate fuse in series with the output.  
+Vout  
Output Current Limiting  
Current limiting inception is defined as the point at which full power  
falls below the rated tolerance. See the Performance/Functional  
Specifications. Note particularly that the output current may briefly rise  
above its rated value in normal operation as long as the average output  
power is not exceeded. This enhances reliability and continued operation  
of your application. If the output current is too high, the converter will  
enter the short circuit condition.  
C1  
C2  
SCOPE  
Rload  
-Vout  
Output Short Circuit Condition  
C1 = 1uF; C2 = 10uF  
LO AD 2-3 INCHES(51-76mm) FROM MODULE  
When a converter is in current-limit mode, the output voltage will drop as  
the output current demand increases. If the output voltage drops too low  
(approximately 97% of nominal output voltage for most models), the PWM  
controller will shut down. Following a time-out period, the PWM will  
restart, causing the output voltage to begin rising to its appropriate value.  
If the short-circuit condition persists, another shutdown cycle will initiate.  
This rapid on/off cycling is called “hiccup mode.” The hiccup cycling  
reduces the average output current, thereby preventing excessive internal  
temperatures and/or component damage.  
Figure 4 Measuring Output Ripple and Noise (PARD)  
Minimum Output Loading Requirements  
All models regulate within specification and are stable under no load to  
full load conditions. Operation under no load might however slightly  
increase output ripple and noise.  
Thermal Shutdown  
The “hiccup” system differs from older latching short circuit systems  
because you do not have to power down the converter to make it restart.  
The system will automatically restore operation as soon as the short  
circuit condition is removed.  
To prevent many over temperature problems and damage, these  
converters include thermal shutdown circuitry. If environmental  
conditions cause the temperature of the DC-DC’s to rise above the  
Operating Temperature Range up to the shutdown temperature, an on-  
board electronic temperature sensor will power down the unit. When the  
temperature decreases below the turn-on threshold, the converter will  
automatically restart. There is a small amount of hysteresis to prevent  
rapid on/off cycling.  
Output Capacitive Load  
These converters do not require external capacitance added to achieve  
rated specifications. Users should only consider adding capacitance to  
reduce switching noise and/or to handle spike current load steps. Install  
only enough capacitance to achieve noise objectives. Excess external  
capacitance may cause degraded transient response and possible  
oscillation or instability.  
CAUTION: If you operate too close to the thermal limits, the converter  
may shut down suddenly without warning. Be sure to thoroughly test your  
application to avoid unplanned thermal shutdown.  
NOTICE: Please use only this customer data sheet as product  
documentation when laying out your printed circuit boards and applying  
this product into your application. Do NOT use other materials as official  
documentation such as advertisements, product announcements, or  
website graphics.  
Temperature Derating Curves  
The graphs in this data sheet illustrate typical operation under a variety of  
conditions. The Derating curves show the maximum continuous ambient  
air temperature and decreasing maximum output current which is  
acceptable under increasing forced airflow measured in Linear Feet per  
Minute (“LFM”). Note that these are AVERAGE measurements. The  
converter will accept brief increases in current or reduced airflow as long  
as the average is not exceeded.  
We strive to have all technical data in this customer data sheet highly  
accurate and complete. This customer data sheet is revision-controlled  
and dated. The latest customer data sheet revision is normally on our  
website (www.murata-ps.com) for products which are fully released to  
Manufacturing. Please be especially careful using any data sheets labeled  
“Preliminary” since data may change without notice.  
Note that the temperatures are of the ambient airflow, not the  
converter itself which is obviously running at higher temperature than the  
outside air.  
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SDC_IRQ.A01.D06 Page 25 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Remote Sense Input  
Trimming the Output Voltage  
The Trim input to the converter allows the user to adjust the output  
voltage over the rated trim range (please refer to the Specifications). In  
the trim equations and circuit diagrams that follow, trim adjustments use  
either a trimpot or a single fixed resistor connected between the Trim  
input and either the +Sense or –Sense terminals. Trimming resistors  
should have a low temperature coefficient ( 100 ppm/deg.C or less) and  
be mounted close to the converter. Keep leads short. If the trim function  
is not used, leave the trim unconnected. With no trim, the converter will  
exhibit its specified output voltage accuracy.  
Use the Sense inputs with caution. Sense is normally connected at the  
load. Sense inputs compensate for output voltage inaccuracy delivered at  
the load. This is done by correcting IR voltage drops along the output  
wiring and the current carrying capacity of PC board etch. This output  
drop (the difference between Sense and Vout when measured at the  
converter) should not exceed 0.5V. Consider using heavier wire if this  
drop is excessive. Sense inputs also improve the stability of the converter  
and load system by optimizing the control loop phase margin.  
NOTE: The Sense input and power Vout lines are internally connected  
through low value resistors to their respective polarities so that the  
converter can operate without external connection to the Sense.  
Nevertheless, if the Sense function is not used for remote regulation, the  
user should connect +Sense to +Vout and –Sense to –Vout at the  
converter pins.  
There are two CAUTIONs to observe for the Trim input:  
CAUTION: To avoid unplanned power down cycles, do not exceed  
EITHER the maximum output voltage OR the maximum output power  
when setting the trim. Be particularly careful with a trimpot. If the output  
voltage is excessive, the OVP circuit may inadvertantly shut down the  
converter. If the maximum power is exceeded, the converter may enter  
current limiting. If the power is exceeded for an extended period, the  
converter may overheat and encounter overtemperature shut down.  
The remote Sense lines carry very little current. They are also  
capacitively coupled to the output lines and therefore are in the feedback  
control loop to regulate and stabilize the output. As such, they are not low  
impedance inputs and must be treated with care in PC board layouts.  
Sense lines on the PCB should run adjacent to DC signals, preferably  
Ground. In cables and discrete wiring, use twisted pair, shielded tubing or  
similar techniques.  
CAUTION: Be careful of external electrical noise. The Trim input is a  
senstive input to the converter’s feedback control loop. Excessive  
electrical noise may cause instability or oscillation. Keep external  
connections short to the Trim input. Use shielding if needed.  
Any long, distributed wiring and/or significant inductance introduced  
into the Sense control loop can adversely affect overall system stability. If  
in doubt, test your applications by observing the converter’s output  
transient response during step loads. There should not be any  
appreciable ringing or oscillation. You may also adjust the output trim  
slightly to compensate for voltage loss in any external filter elements. Do  
not exceed maximum power ratings.  
Trim Equations  
Trim Down  
Connect trim resistor between  
5.11  
D
RTrimDn  
Contact and PCB resistance  
losses due to IR drops  
Trim Up  
Connect trim resistor between  
trim pin and +Sense  
+VOUT  
VIN  
IOUT  
+SENSE  
5.11* Vnom * (1+D )  
RTrimUp  
Sense Current  
D
1.225 * D  
ON/OFF  
CONTROL  
TRIM  
SENSE  
-VOUT  
LOAD  
Sense Return  
IOUT Return  
Where,  
D = | (Vnom  
out ) / Vnom |  
Vnom is the nominal, untrimmed output voltage.  
Vout is the desired new output voltage.  
VIN  
Do not exceed the specified trim range or maximum power ratings when adjusting trim.  
Use 1% precision resistors mounted close to the converter on short leads.  
Contact and PCB resistance  
losses due to IR drops  
If sense is not installed, connect the trim resistor to the respective Vout pin.  
Figure 5 Remote Sense Circuit Configuration  
Trim Circuits  
Please observe Sense inputs tolerance to avoid improper operation:  
[Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] 10ꢀ of Vout  
Output overvoltage protection is monitored at the output voltage pin, not  
the Sense pin. Therefore excessive voltage differences between Vout and  
Sense together with trim adjustment of the output can cause the  
overvoltage protection circuit to activate and shut down the output.  
Power derating of the converter is based on the combination of maximum  
output current and the highest output voltage. Therefore the designer  
must insure:  
(Vout at pins) x (Iout) (Max. rated output power)  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 26 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
+VOUT  
+VOUT  
+SENSE  
TRIM  
+VIN  
+VIN  
+SENSE  
RTRIM DOWN  
ON/OFF  
CONTROL  
TRIM  
ON/OFF  
CONTROL  
LOAD  
LOAD  
-SENSE  
-SENSE  
-VOUT  
-VIN  
-VOUT  
-VIN  
Figure 8 Trim Connections to Decrease Output Voltage  
SMT Reflow Soldering Guidelines  
Figure 6 Trim Connections Using A Trimpot  
The surface-mount reflow solder profile shown below is suitable for  
SAC305 type lead-free solders. This graph should be used only as a  
guideline. Many other factors influence the success of SMT reflow  
soldering. Since your production environment may differ, please thoroughly  
review these guidelines with your process engineers.  
+VOUT  
+VIN  
+SENSE  
ON/OFF  
CONTROL  
TRIM  
LOAD  
RTRIM UP  
-SENSE  
-VOUT  
-VIN  
Figure 7 Trim Connections to Increase Output Voltages  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 27 of 28  
IRQ Series  
Encapsulated 100-Watt Isolated DC-DC Converter  
Vertical Wind Tunnel  
Murata Power Solutions employs a computer controlled  
custom-designed closed loop vertical wind tunnel, infrared  
video camera system, and test instrumentation for accurate  
airflow and heat dissipation analysis of power products.  
The system includes a precision low flow-rate anemometer,  
IR Transparent  
optical window  
variable speed fan, power supply input and load controls,  
Variable  
temperature gauges, and adjustable heating element.  
The IR camera monitors the thermal performance of the  
Unit Under Test (UUT) under static steady-state conditions. A  
special optical port is used which is transparent to infrared  
wavelengths.  
Unit under  
test (UUT)  
speed fan  
IR Video  
Camera  
Both through-hole and surface mount converters are  
soldered down to a 10"x10" host carrier board for realistic  
heat absorption and spreading. Both longitudinal and trans-  
verse airflow studies are possible by rotation of this carrier  
board since there are often significant differences in the heat  
dissipation in the two airflow directions. The combination of  
adjustable airflow, adjustable ambient heat, and adjustable  
Input/Output currents and voltages mean that a very wide  
range of measurement conditions can be studied.  
The collimator reduces the amount of turbulence adjacent  
to the UUT by minimizing airflow turbulence. Such turbu-  
lence influences the effective heat transfer characteristics  
and gives false readings. Excess turbulence removes more  
heat from some surfaces and less heat from others, possibly  
causing uneven overheating.  
Heating  
element  
Precision  
low-rate  
anemometer  
3” below UUT  
Ambient  
temperature  
sensor  
Both sides of the UUT are studied since there are differ-  
ent thermal gradients on each side. The adjustable heating  
element and fan, built-in temperature gauges, and no-contact  
IR camera mean that power supplies are tested in real-world  
conditions.  
Airflow  
collimator  
This product is subject to the following operating requirements  
and the Life and Safety Critical Application Sales Policy:  
Refer to: http://www.murata-ps.com/requirements/  
Murata Power Solutions, Inc.  
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
ISO 9001 and 14001 REGISTERED  
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other  
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply  
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without  
notice.  
© 2016 Murata Power Solutions,Inc.  
www.murata-ps.com/support  
SDC_IRQ.A01.D06 Page 28 of 28  

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