PQ60033EKA15NNS-G [SYNQOR]
Eighth-brick DC-DC Converter; 八分之一砖DC- DC转换器
| 型号： | PQ60033EKA15NNS-G |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | Eighth-brick DC-DC Converter |
| 文件： | 总15页 (文件大小：815K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Technical
Specification
PQ60033EKx15
48V
Input
3.3V
Output
15A
Current
2000V dc
Eighth-brick
DC-DC Converter
Isolation
The PowerQor® Eighth-brick converter series is composed of
next-generation, board-mountable, isolated, fixed switching
frequency dc-dc converters that use synchronous rectification
to achieve extremely high power conversion efficiency. The
power dissipated by the converter is so low that a heatsink
is not required, which saves cost, weight, height, and
application effort. All of the power and control components
are mounted to the multi-layer PCB substrate with high-yield
surface mount technology. Since the PowerQor converter has
no explicit thermal interfaces, it is extremely reliable. RoHS
Compliant (see page 15).
Operational Features
• High efficiency, 88% at full rated load current
• Delivers up to 15A of output current with minimum derating - no
heatsink required
• Wide input voltage range: 35-75V, with 100V, 100ms input voltage
transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
Control Features
• On/Off control referenced to input side (positive and negative logic
options are available)
• Remote sense for the output voltage compensates for output
distribution drops
Mechanical Features
• Industry standard eighth-brick pin-out configuration
• Size: 0.90” x 2.3” (22.9x58.4mm)
• Output voltage trim permits custom voltages and voltage margining
• Low Profile total height only 0.340” (8.64mm), permits better
airflow and smaller card pitch
Safety Features
• Total weight: 0.85oz (24g)
Pending
• Flanged pins designed to permit surface mount soldering
(avoid wave solder) using FPiP technique"
• 2000V, 30MΩ input-to-output isolation provides input/output
ground separation
• UL 60950-1 recognized (US & Canada), basic insulation rating
• TUV certified to EN60950-1
Protection Features
• Board and plastic components meet UL94V-0
flammability requirements
• Input under-voltage lockout disables converter at low input
voltage conditions
• Output current limit and short circuit protection protects
converter and load from permanent damage and consequent
hazardous conditions
CONTENTS
Page No.
Mechanical Drawing - Open frame - EKA & EKL (low Profile) . . . . . . . . 2
Mechanical Drawing - Encased . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PQ60033EKA15 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . .4-5
PQ60033EKx15 Standards & Qualification Testing . . . . . . . . . . . . . . . . 6
PQ60033EKx15 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 1
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
MECHANICAL DRAWING - OPEN FRAME - EKA & EKL (LOW PROFILE)
.900 (22.86)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.340 ± 0.014
(8.64 ± 0.35)
Overall Height
0.150 (3.81)
0.410 ± 0.014
(10.41 ± 0.35)
Overall Height
8
7
6
5
4
0.145 (3.68)
0.145 (3.68)
2.30
(58.4)
Side View
Top View
2.00
(50.8)
1
2
3
.14 (3.6)
0.121±.017
(3.07±0.43)
0.051±.017
(1.3±0.43)
0.150 (3.8)
Bottom Side Clearance
Bottom Side Clearance
0.300 (7.62)
EKA
Side View
EKL
Side View
0.600 (15.24)
NOTES
PIN DESIGNATIONS
1)
2)
3)
4)
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
Pin
Name
Vin(+)
Function
diameter standoff shoulders.
1
Positive input voltage
TTL input to turn converter on
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
2
ON/OFF and off, referenced to Vin(–), with
internal pull up.
All Pins: Material - Copper Alloy- Finish (RoHS 6/6) - Matte Tin over
Nickel plate
3
4
Vin(–)
Vout(–) Negative output voltage
SENSE(–) Negative remote sense1
TRIM
Output voltage trim2
Negative input voltage
5)
6)
Undimensioned components are shown for visual reference only.
5
6
7
8
All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x
+/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7)
8)
9)
Weight: 0.85 oz (24 g) typical
SENSE(+) Positive remote sense3
Workmanship: Meets or exceeds IPC-A-610C Class II
Vout(+) Positive output voltage
The flanged pins are designed to permit surface mount soldering
(allowing to avoid the wave soldering process) through the use of the
flanged pin-in-paste technique.
Notes:
1) SENSE(–) should be connected to Vout(–)
10)
UL/TUV standards require a clearance greater than 0.04” (1.02mm)
between input and output for Basic insulation. This issue should be
considered if any copper traces are on the top side of the user’s
board. Note that the ferrite core shown at left above is considered
part of the input/primary circuit.
either remotely or at the converter.
2) Leave TRIM pin open for nominal output voltage.
3) SENSE(+) should be connected to Vout(+)
either remotely or at the converter.
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 2
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKC15
MECHANICAL DRAWING - ENCASED
.986±0.020 (25.04±0.5)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.150 (3.81)
0.500 ± 0.025
(12.7 ± 0.63)
Overall Height
8
7
6
5
4
2.386±0.020
(60.6±0.5)
Top View
Side View
2.00
(50.8)
0.183±0.020
(4.65±0.5)
1
2
3
0.193±0.020 (4.9±0.5)
0.300 (7.62)
0.180±.010
(4.57±0.25)
0.600 (15.24)
PIN DESIGNATIONS
NOTES
1)
2)
3)
4)
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
Pin
Name Function
1
Vin(+) Positive input voltage
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
TTL input to turn converter on
2
ON/OFF and off, referenced to Vin(–), with
Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
internal pull up.
All Pins: Material - Copper Alloy- Finish (RoHS 6/6) - Matte Tin over
Nickel plate
3
4
5
6
7
8
Vin(–)
Negative input voltage
Vout(–) Negative output voltage
SENSE(–) Negative remote sense1
5)
6)
Undimensioned components are shown for visual reference only.
All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x
+/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
TRIM
Output voltage trim2
SENSE(+) Positive remote sense3
7)
8)
9)
Weight: 5 oz (142 g) typical
Workmanship: Meets or exceeds IPC-A-610C Class II
Vout(+) Positive output voltage
The flanged pins are designed to permit surface mount soldering
(allowing to avoid the wave soldering process) through the use of the
flanged pin-in-paste technique.
Notes:
1) SENSE(–) should be connected to Vout(–) either
remotely or at the converter.
2) Leave TRIM pin open for nominal output voltage.
3) SENSE(+) should be connected to Vout(+) either
remotely or at the converter.
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 3
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
PQ60033EKx15 ELECTRICAL CHARACTERISTICS
Ta = 25°C, airflow rate = 300 LFM, Vin = 48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
75
V
V
V
Continuous
Operating
Continuous
Operating Transient Protection
Isolation Voltage
100
100ms transient, square wave
Input to Output
2000
100
V dc
°C
°C
V
Basic insulation
Operating Temperature
Storage Temperature
-40
-55
0
125
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
13.5
35
48
75
V
33.0
31.5
1.2
34.0
32.3
1.7
35.0
33.5
2.2
V
V
See Note 1
V
1.7
A
100% Load, 35V Vin, nominal Vout
61.3
7.4
mA
mA
Disabled Input Current
10
2
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Recommended External Input Capacitance
Input Filter Component Values (L\C)
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
0.03
A s
96
1.8
60
mV
mA
mA
A
1000V/ms input transient
RMS thru 10μH inductor; Figures 13 & 15
RMS; Figures 13 & 14
20
Fast acting external fuse recommended
Typical ESR 0.1-0.2Ω; Figure 13
47
µF
1\2.35
µH\µF Internal values; see Figure E
3.267
3.250
3.30
3.333
V
±0.12\3.96
±0.09\2.97
±10
%\mV
%\mV
mV
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
3.300
3.350
V
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 2
45
mV
mV
A
Full load; see Figures 13 & 16
RMS
15
Full load; see Figures 13 & 16
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance Electrolytic
EFFICIENCY
0
15
Subject to thermal derating; Figures 5 - 8
17.0
19.0
3
21.0
A
V
4
6.5
2
11.5
A
Negative current drawn from output
Negative current drawn from output
Nominal Vout at full load (resistive load)
mA
mF
3
100% Load
88
88
%
%
Figures 1 - 4
Figures 1 - 4
50% Load
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 4
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
PQ60033EKx15 ELECTRICAL CHARACTERISTICS (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max. Units Notes & Conditions
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
Step Change in Output Current (5A/µs)
Settling time
98
dB
120Hz
See Note 3
240
130
600
mV
mV
µs
50% to 75% to 50% Iout max; Figure 11
50% to 75% to 50% Iout max; Figure 12
To within 1% Vout nom
Turn-On Transient
Turn-On Time
22
200
0
ms
ms
%
Full load, Vout=90% nom; Figures 9 & 10
-40°C to +125°C; Figure F
Start-Up Inhibit Time
180
240
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Maximum Output Capacitance
2000
30
V
See Absolute Maximum Ratings
See Note 4
MΩ
pF
Isolation Capacitance (input to output)
1000
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
Transformer Temperature
FEATURE CHARACTERISTICS
Switching Frequency
270
300
330
kHz
ON/OFF Control (Option P)
Off-State Voltage
0
2
0.8
V
V
On-State Voltage
13.5
ON/OFF Control (Option N)
Off-State Voltage
2
0
13.5
0.8
V
V
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Application notes; Figures A & B
5
6
V
Pull-Up Resistance
10
kΩ
%
%
%
°C
°C
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-10
10
10
Measured across Pins 8 & 4; Figure C
Measured across Pins 8 & 4
120
130
125
10
140
Over Full Temperature Range; % of nominial Vout
Average PCB Temperature
6
2.5
10 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
6
1.1
10 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
6
10 Hrs. See our website for details
Note 1: The UVLO values represented here are typical of lighter load conditions. The unit may shut down under high load conditions before the typical
UVLO limits.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 3: The module requires a minimum amount of capacitance (100μF) in order to ride through a No Load to Full Load transient (0.1A/μs) without
shutdown.
Note 4: Higher values of isolation capacitance can be added external to the module.
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 5
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
PQ60033EKx15 Standards & Qualification Testing
Pending
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL/cUL 60950-1
File # E194341, Basic insulation
Certified by TUV
EN60950-1
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
Test on entire assembly; board & plastic components UL94V-0 compliant
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. Contact SynQor for official safety certificates on new
releases or download from the SynQor website.
Parameter
# Units Test Conditions
QUALIFICATION TESTING
Life Test
32
5
95% rated Vin and load, units at derating point, 1000 hours
Vibration
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
5
10
5
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
5
5
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 6
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
100
95
90
85
80
75
70
65
60
91
90
89
88
87
86
85
84
83
35 Vin
48 Vin
75 Vin
25º C
40º C
55º C
0
5
10
15
100
200
300
400
Load Current (A)
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power
vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C
(nominal input voltage).
14
12
10
8
6
5
4
6
4
3
25º C
35 Vin
40º C
55º C
2
0
48 Vin
75 Vin
2
0
5
10
15
100
200
300
400
Load Current (A)
Air Flow (LFM)
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
Figure 3: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
20
15
10
400 LFM (2.0 m/s)
5
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
25
40
55
Ambient Air Temperature (ºC)
70
85
Figure 6: Thermal plot of converter at 14.6 A load current (48W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter from
pin 3 to pin 1 (nominal input voltage).
Figure 5: Maximum output power-derating curve vs. ambient air
temperature for airflow rates of 100 LFM through 400 LFM with air
flowing from pin 3 to pin 1 (nominal input voltage).
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 7
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
20
15
10
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
0
25
40
55
Ambient Air Temperature (ºC)
70
85
Figure 8: Thermal plot of converter at 13.9A load current (46 W) with
55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
Figure 7: Maximum output power derating curves vs. ambient air
temperature for airflow rates of 100 LFM through 400 LFM with air flowing
across the converter from input to output (nominal input voltage).
Figure 10: Turn-on transient at zero load (10 ms/div). Load cap: 10 µF,
100 mΩ ESR tantalum capacitor and 1 µF ceramic capacitor. Ch 1: Vout
(1V/div), Ch 2: ON/OFF input (5 V/div).
Figure 9: Turn-on transient at full load (resistive load) (10 ms/div). Load cap:
10 uF, 100 mΩ ESR tantalum capacitor and 1 uF ceramic capacitor. Input
voltage pre-applied. Ch 1: Vout (1V/div), Ch 2: ON/OFF input (5 V/div).
Figure 11: Output voltage response to step-change in load current (50%-
75%-50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF tantalum cap and
1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).
Figure 12: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max): dI/dt = 1A/µs). Load cap: 470µF, 30 mΩ
ESR tantalum cap and 1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2:
Iout (5A/div).
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 8
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
See Fig. 15
10 µH
See Fig. 14
source
impedance
See Fig. 16
iS
iC
DC/DC
Converter
VOUT
VSOURCE
15
µ
W
F,
ESR
1 µF
47 µF,
ceramic
100m
<1
W ESR
capacitor
tantalum
electrolytic
capacitor
capacitor
Figure 14: Input Terminal Ripple Current, ic, at full rated output current
and nominal input voltage with 10µH source impedance and 47µF
electrolytic capacitor (50 mA/div). See Figure 13.
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current
(Figure 15) and Output Voltage Ripple (Figure 16).
Figure 15: Input reflected ripple current, is, through a 10 µH source
inductor, using a 47µF electrolytic input capacitor (5mA/div). See
Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 1µF ceramic capacitor and
15µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.
12
11
10
9
8
7
6
5
4
3
100% Load
2
1
0
50% Load
0% Load
40.0
39.5
39.0
38.5
38.0
37.5
37.0
36.6
36.0
35.5
35.0
Input Voltage (V)
Figure 18: Achievable trim-up percentage vs. input voltage at 0%, 50%
and full load. Vin=35-40V.
Figure 17: Output voltage response to step-change in input voltage
(48V to 75V), at 15A load current. Load cap: 15µF tantalum capacitor
and 1uF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Vin (50V/div).
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 9
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
0
-10
1
-20
-30
0.1
-40
-50
-60
0.01
-70
-80
35 Vin
48 Vin
75 Vin
-90
35 Vin
48 Vin
75 Vin
0.001
0.0001
-100
-110
-120
10
100
1,000
Hz
10,000
100,000
10
100
H1,z000
10,000
100,000
Figure 19: Magnitude of incremental output impedance (Zout = Vout/Iout)
Figure 20: Magnitude of incremental forward transmission
for minimum, nominal, and maximum input voltage at full rated power.
(FT = Vout/Vin) for minimum, nominal, and maximum input voltage at
full rated power.
5
-5
1000
100
10
-15
-25
-35
35 Vin
1
35 Vin
48 Vin
75 Vin
-45
48 Vin
75 Vin
0.1
-55
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 22: Magnitude of incremental input impedance (Zin = Vin/Iin)
Figure 21: Magnitude of incremental reverse transmission (RT = Iin/Iout)
for minimum, nominal, and maximum input voltage at full rated power.
for minimum, nominal, and maximum input voltage at full rated power.
5
4
3
2
35 Vin
1
48 Vin
75 Vin
0
0
5
10
15
20
25
Load Current (A)
Figure 23: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Product # PQ60033EKx15
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Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative
logic version, the ON/OFF signal is active low (meaning that a
low turns the converter on). Figure A details five possible circuits
for driving the ON/OFF pin. Figure B is a detailed look of the
internal ON/OFF circuitry.
BASIC OPERATION AND FEATURES
The single stage power converter switches at a fixed
frequency for predictable EMI performance. Rectification of
the transformer’s output is accomplished with synchronous
rectifiers. These devices, which are MOSFETs with a very low
on-state resistance, dissipate far less energy than Schottky
diodes. This is the primary reason that the PowerQor
converter has such high efficiency, even at very low output
voltages and very high output currents.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be
connected to Vout(-) at the point on the board where regulation
is desired. A remote connection at the load can adjust for a
voltage drop only as large as that specified in this datasheet,
that is
Dissipation throughout the converter is so low that it does
not require a heatsink for operation. Since a heatsink is not
required, the PowerQor converter does not need a metal
baseplate or potting material to help conduct the dissipated
energy to the heatsink. The PowerQor converter can thus be
built more simply and reliably using high yield surface mount
techniques on a PCB substrate.
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
The PowerQor series of eighth-brick, quarter-brick and half-
brick converters uses the industry standard footprint and
pin-out configuration.
Pins 7 and 5 must be connected for proper regulation of
the output voltage. If these connections are not made, the
converter will deliver an output voltage that is slightly higher
than its specified value.
CONTROL FEATURES
Note: the output over-voltage protection circuit senses the
voltage across the output (pins 8 and 4) to determine when
it should trigger, not the voltage across the converter’s sense
leads (pins 7 and 5). Therefore, the resistive drop on the board
should be small enough so that output OVP does not trigger,
even during load transients.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There
are two versions of the converter that differ by the sense of the
logic used for the ON/OFF input.
ON/OFF
ON/OFF
ON/OFF
_
_
_
Vin( )
Vin( )
Vin( )
5V
Positive Logic
(Permanently Enabled)
Negative Logic
(Permanently Enabled)
Remote Enable Circuit
10k
50k
100pF
5V
ON/OFF
ON/OFF
TTL
TTL/
CMOS
ON/OFF
_
Vin( )
_
_
Vin( )
Vin( )
Open Collector Enable Circuit
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Product # PQ60033EKx15
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Doc.# 005-0005111 Rev. B
06/17/09
Page 11
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
Total DC Variation of Vout: For the converter to meet its
full specifications, the maximum variation of the DC value of
Vout, due to both trimming and remote load voltage drops,
should not be greater than that specified for the output
voltage trim range.
To decrease the output voltage, the user should connect a
resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be
PROTECTION FEATURES
511
∆%
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in the
application note titled “Input System Instability”. The lockout
circuitry is a comparator with DC hysteresis. When the input
voltage is rising, it must exceed the typical Turn-On Voltage
Threshold value (listed on the specification page) before the
converter will turn on. Once the converter is on, the input
voltage must fall below the typical Turn-Off Voltage Threshold
value before the converter will turn off.
R
=
- 10.22 (kW)
trim-down
( )
where
Vnominal – Vdesired
Vnominal
=
x 100%
∆%
To increase the output voltage, the user should connect a
resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
Output Current Limit: Once the output current reaches the
current-limit point, the converter is in the cycle-by-cycle current
limit mode for a short time that the typical value is 210µs. If the
over current no longer exists during this short time, the converter
resumes the normal condition. If the over current still persists
after this short time, the converter enters a “hiccup mode” where
it repeatedly turns on and off at a 5 Hz (nominal) frequency until
the over current condition is removed. The dual advantages of
this design are that a short term overload will not cause a hiccup
mode restart and it prevents excessive heating of the converter
or the load board in extended over current condition.
5.11VOUT(100+∆%)
1.225∆%
511
_
_
R
=
trim-up
where
(kW)
10.22
)
(
∆%
V
= Nominal Output Voltage
OUT
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the
output voltage can be trimmed up or down.
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
It is not necessary for the user to add capacitance at the Trim
pin. The node is internally bypassed to eliminate noise.
10,000
1,000
100
10
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
The thermal shutdown circuit is designed to turn the converter
off when the temperature at the sensed location reaches the
Over-Temperature Shutdown value. It will allow the converter
to turn on again when the temperature of the sensed location
falls by the amount of the Over-Temperature Shutdown Restart
Hysteresis value.
1
0
1
2
3
4
5
6
7
8
9
10
% increase Vout
% decrease Vout
Figure C: Trim Graph for 1.8Vout module
Figure C: Trim Graph for 3.3 Vout module
Product # PQ60033EKx15
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06/17/09
Page 12
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
Startup Inhibit Period: The Startup Inhibit Period ensures
that the converter will remain off for approximately 200ms
when it is shut down for any reason. In all, there are five ways
that the converter can be shut down, initiating a Startup Inhibit
Period:
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor website which provides
an understanding of why this instability arises, and shows the
preferred solution for correcting it.
• Input Under-Voltage Lockout
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
• Turned off by the ON/OFF input
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external
input electrolytic capacitor. The recommended external input
capacitance is specified in the “Input Characteristics” section.
More detailed information is available in the application note
titled “EMI Characteristics” on the SynQor website.
Vout(+)
Vin(+)
Vsense(+)
Electrolytic
Capacitor
External
Input
Filter
R
trim-up
or
47µF
Vin
Trim
ON/OFF
C
R
load
trim-down
Iload
_
Vsense( )
_
_
Vin( )
Vout( )
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C
_
Vin( )
Figure E: Internal Input Filter Diagram (component values listed on the specifications page).
Product # PQ60033EKx15
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06/17/09
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Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the
Input Under-Voltage Lockout is released, and a Startup Inhibit
Period is initiated. At the end of this delay, the ON/OFF pin is
evaluated, and since it is active, the unit turns on.
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
V
in
Under-Voltage
Lockout
Turn-On
Threshold
ON/OFF
(pos logic)
OFF
ON
ON
OFF
ON
22 ms
(typical turn on time)
V
out
10ms
(typical start-up
inhibit period)
200ms
200ms
t
t0
t1
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60033EKx15
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Doc.# 005-0005111 Rev. B
06/17/09
Page 14
Input35-75V
Output3.3V
Current15A
Part No.PQ60033EKx15
Technical Specification
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
PQ 60 033 E K A 15 N R S - G
6/6 RoHS
Options (see
Ordering Information)
Output Current
Continuous Input
Voltage
Maximum
Output Current
Model Number
Output Voltage
Thermal Design
Performance Level
Package Size
PQ60033EKA15xyz - G
PQ60033EKL15xyz - G
PQ60033EKC15xyz - G
35-75V
35-75V
35-75V
3.3V
3.3V
3.3V
15A
15A
15A
EKA has standard height, EKL is a low profile product
Output Voltage
Input Voltage
Product Family
The following options must be included in place of the x y z
spaces in the model numbers listed above.
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. The “-G”
suffix indicates 6/6 RoHS compliance.
Options Description: x y z
Thermal Design
Enable Logic
Pin Style
Feature Set
S - Standard
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
A - Open Frame
L - Low Profile
C - Encased
P - Positive
N - Negative
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. This SynQor product is 6/6 RoHS
compliant. For more information please refer to SynQor’s
RoHS addendum available at our RoHS Compliance / Lead Free
PATENTS
SynQor holds the following patents, one or more of which
might apply to this product:
Initiative web page or e-mail us at rohs@synqor.com
.
5,999,417
6,594,159
6,927,987
7,119,524
6,222,742
6,731,520
7,050,309
7,269,034
6,545,890
6,894,468
7,072,190
7,272,021
6,577,109
6,896,526
7,085,146
7,272,023
Contact SynQor for further information:
Warranty
Phone:
Toll Free: 888-567-9596
978-849-0600
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from SynQor.
Fax:
E-mail:
Web:
978-849-0602
power@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product # PQ60033EKx15
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005111 Rev. B
06/17/09
Page 15
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