LANC122.5W12 [WALL]
DC/DC Converter 9-18 VDC Input 2.5 VDC Output at 3.5A; DC / DC转换器9-18 VDC输入2.5 VDC输出为3.5A
| 型号： | LANC122.5W12 |
| 厂家： | 
WALL INDUSTRIES,INC. |
| 描述： | DC/DC Converter 9-18 VDC Input 2.5 VDC Output at 3.5A |
| 文件： | 总14页 (文件大小：880K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TECHNICAL DATASHEET
LANC122.5W12
DC/DC Converter
9-18 VDC Input
2.5 VDC Output at 3.5A
Features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
RoHS Compliant
Single Output
Standard 24 Pin DIP and SMT Package
Five-Sided Continuous Shield
No Minimum Load Required
High Power Density
UL
TUV
CB
CE MARK
High Efficiency up to 88%
Small Size: 1.25 x 0.8 x 0.450 Inches
Input to Output Isolation (1600VDC)
2:1 Wide Input Voltage Range
Fixed Switching Frequency
Input Under-Voltage Protection
Output Over-Voltage Protection
Over-Current Protection
Applications:
•
•
•
•
Distributed Power Architectures
Communications Equipment
Computer Equipment
Output Short Circuit Protection
Remote ON/OFF
Work Stations
Description:
The LANCW12 single output series offers 12 watts of output power from a package in an IC compatible 24pin
DIP and SMT configuration. LANCW12 single output series has 2:1 wide input voltage of 9-18VDC, 18-
36VDC, and 36-75VDC. The LANCW12 single output series features 1600VDC of isolation, short circuit
protection and five sided shielding. All models are particularly suited for telecommunications, industrial,
mobile telecom, and test equipment applications.
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1 of 14
TECHNICAL DATASHEET
LANC122.5W12
Technical Specifications
Model No. LANC122.5W12
All specifications are based on 25 oC, Nominal Input Voltage and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
Related condition
Min
Nom
Max
Unit
Switching Frequency
INPUT (Vin)
Test at nominal Vin and full load
400
kHz
Operating Voltage Range
Input Voltage (Continuous)
Input Voltage (Transient 100ms)
UVLO Turn-on Threshold
UVLO Turn-off Threshold
Input Standby Current
Input Voltage Variation
Input Current
9
12
18
20
36
Vdc
Vdc
Vdc
Vdc
Vdc
mA
9
8
Nominal Vin and No Load
50
Complies with EST300 132 part 4.4
Nominal Vin and Full Load
5
V/ms
mA
935
5 to 20MHz, 12µH source impedance
(See the Test Setup section - pg 8)
Test at nominal Vin and full load
(See the Test Setup section – pg 8)
Reflected Ripple Current
20
82
mApk-pk
%
EFFICIENCY
OUTPUT (Vo)
Operating Output Range
Load Regulation
Line Regulation
Nominal Vin and Full Load
0% to 100% Full Load
2.47
-1.0
-0.2
2.5
2.53
+1.0
+0.2
Vdc
%
LL to HL at Full Load
%
5Hz to 20MHz bandwidth
(See the Test Setup section - pg 8)
Output Ripple & Noise
85
mVpk-pk
Output Current
0
3.5
3
A
Output Voltage Overshoot
Over Voltage Protection
Over Current Protection
Short Circuit Protection
DYNAMIC LOAD RESPONSE
Peak Deviation
LL to HL at Full Load
Zener diode clamp
0
% Vout
Vdc
3.9
150
% FL
Continuous, automatic recovery
Test at nominal Vin
Load step change from 75 to 100% or 100 to 75 % of FL
200
250
mV
µs
Setting Time (Vout < 10% peak deviation)
The ON/OFF pin voltage is referenced to -Vin
(See the Remote ON/OFF Control section - pg 5)
REMOTE ON/OFF
ON/OFF pin High Voltage (Remote ON)
ON/OFF pin Low Voltage (Remote OFF)
ON/OFF pin Low Voltage, input current
START UP TIME
3.0
0
12
1.2
2.5
Vdc
Vdc
mA
Test at nominal Vin and constant resistive load
Power Up
450
5
ms
ms
Remote ON/OFF
ISOLATION
Isolation Voltage (Input-Output)
Isolation Voltage (Output to Case–DIP Type)
Isolation Voltage (Output to Case–SMT Type)
Isolation Voltage (Input to Case - DIP Type)
Isolation Voltage (Input to Case - SMT Type)
Isolation Resistance
1600
1600
1000
1600
1000
1
Vdc
Vdc
Vdc
Vdc
Vdc
GΩ
Isolation Capacitance
1200 pF
ENVIRONMENTAL
Operating Ambient Temperature (w/ derating)
Operating Case Temperature
Storage Temperature
-40
85
oC
oC
oC
100
105
-55
Temperature Coefficient
-0.02
+0.02 % / oC
See the MTBF and Reliability section (pg 13)
MTBF
Bellcore TR-NWT-000332, TC=40°C
MIL-STD-217F
2,750,000
1,080,000
hours
hours
MECHANICAL
See Figure 1
Weight
18.0
1.25 x 0.8 x 0.450
grams
Dimensions
inches
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Page 2 of 14
TECHNICAL DATASHEET
LANC122.5W12
Figure 1: Mechanical Dimensions
Pin size is 0.02(0.5) Dia or
0.01 x 0.02 (0.25 x 0.50) Rectangular Pin
DIP Type
0.08(2.0)
1
Table 1
23
22
2
3
Pin Connection
Pin
1
Define
CTRL
-Input
-Input
Pin
Define
BOTTOM
VIEW
2
23
22
+Input
+Input
16
9
3
14
11
9
NC
NC
16
14
-Output
+Output
11
0.15
(3.8)
0.40
(10.2)
0.60(15.2)
0.80(20.3)
1. All dimensions are in Inches (mm)
Tolerance: x.xx±0.02 (x.x±0.5)
2. Pin pitch tolerance ±0.014(0.35)
SMT Type
Suffix-S
0.44(11.2)
0.43(10.9)
1.00(25.4)
Table 2
0.92(23.4)
Pin Connection
Pin
1
Define
CTRL
-Input
-Input
Pin
Define
24
20
1
2
23
22
+Input
+Input
3
5
BOTTOM
9
NC
NC
NC
16
14
-Output
+Output
NC
VIEW
11
9
16
13
Others
Others
Pin Area
12
0.04 x 0.02
(1.0 x 0.5)
0.80(20.3)
1. All dimensions in Inches (mm)
Tolerance: x.xx±0.02 (x.x±0.5)
2. Pin pitch tolerance ±0.014(0.35)
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Page 3 of 14
TECHNICAL DATASHEET
LANC122.5W12
DESIGN CONSIDERATIONS:
Output Over Current Protection
When excessive output currents occur in the system, circuit protection is required on all power supplies.
Normally, overload current is maintained at approximately 150% of rated current for the LANCW12 single
output series.
Fold back-mode is a method of operation in a power supply whose purpose is to protect the power supply from
being damaged during an over-current fault condition. It also enables the power supply to operate normally when
the fault is removed.
One of the problems resulting from over current is that excessive heat may be generated in power devices;
especially MOSFET and Schottky diodes and the temperature of those devices may exceed their specified limits.
A protection mechanism has to be used to prevent those power devices from being damaged.
The operation of fold back is as follows. When the current sense circuit sees an over-current event, the output
voltage of the module will be decreased for low power dissipation and decrease the heat of the module.
Figure 2
Output Over Voltage Protection
The output over-voltage protection consists of an output Zener diode that monitors the voltage on the output
terminals. If the voltage on the output terminals exceeds the over-voltage protection threshold, then the Zener
diode clamps the output voltage.
Input Source Impedance
The power module should be connected to a low impedance input source. Highly inductive source impedance
can affect the stability of the power module. Input external L-C filter is recommended to minimize input
reflected ripple current. The inductor is simulated source impedance of 12µH and capacitor is Nippon chemi-con
KZE series 47µF/100V. The capacitor must as close as possible to the input terminals of the power module for
lower impedance.
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Page 4 of 14
TECHNICAL DATASHEET
LANC122.5W12
Thermal Consideration
The power module operates in a variety of thermal environments. However, sufficient cooling should be
provided to help ensure reliable operation of the unit. Heat is removed by conduction, convention, and radiation
to the surrounding environment. Proper cooling can be verified by measuring the point as the figure below. The
temperature at this location should not exceed 105°C. When operating, adequate cooling must be provided to
maintain the test point temperature at or below 105°C. Although the maximum point temperature of the power
modules is 105°C, you can limit this temperature to a lower value for extremely high reliability.
Figure 3
Measurement shown in inches and millimeters
TOP VIEW
Remote ON/OFF Control
The positive logic remote ON/OFF control circuit is included.
Turns the module ON during a logic High on the On/Off pin and turns OFF during a logic Low. The On/Off pin
is an open collector/drain logic input signal (Von/off) that’s referenced to GND. If not using the Remote On/Off
feature, please open circuit between on/off pin and –input pin to turn the module on.
Remote ON/OFF Implementation
Figure 4
Isolated-Closure Remote ON/OFF
Figure 5
Figure 6
Level Control using Line Voltage
Level Control using TTL Output
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Page 5 of 14
TECHNICAL DATASHEET
LANC122.5W12
Graph 1: Efficiency vs. Output Current
Graph 2: Efficiency vs. Input Voltage (Full Load)
Vin=9V
Vin=12V
Vin=18V
% Of Full Load
Input Voltage (V)
Graph 3: Output Power vs. Ambient Temperature & Airflow
(Nominal Vin)
Graph 4: Power Dissipation Vs. Output Current
Vin=9V
Vin=12V
Vin=18V
Natural Convection
100LFM
200LFM
300LFM
9V
400LFM
12V
18V
500LFM
Ambient Temperature, Ta (°C)
% Of Full Load
Graph 5: Typical Input Start-Up and Output Rise Characteristic
Graph 6: Typical Output Ripple and Noise
(Nominal Vin and Full Load)
(Nominal Vin and Full Load)
Vin
Vout
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Page 6 of 14
TECHNICAL DATASHEET
LANC122.5W12
Graph 7: Using ON/OFF Voltage Start-Up and Vo Rise
Graph 8: Transient Response to Dynamic Load Change from
Characteristic (Nominal Vin and Full Load)
100% to 75% to 100% of Full Load at Nominal Vin
Von-off
Vout
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Page 7 of 14
TECHNICAL DATASHEET
LANC122.5W12
TEST SETUP:
The LANC122.5W12 specifications are tested with the following configurations:
Input Reflected-Ripple Current Measurement Test Setup
Figure 7
Component
Value
12µH
47µF
Voltage
----
Reference
Aluminum Electrolytic Capacitor
L
----
C
100V
Peak-to-Peak Output Ripple & Noise Measurement Setup
Figure 9
Figure 8
Output Voltage and Efficiency Measurement Setup
Figure 10
Vout × Iout
Vin× Iin
Efficiency =
×100%
NOTE: All measurements are taken at the module terminals
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Page 8 of 14
TECHNICAL DATASHEET
LANC122.5W12
EMC Considerations
Suggested Schematic for EN55022 Conducted Emission Class A Limits
Figure 11
Recommended Layout with Input Filter
Figure 12
To meet Conducted Emissions EN55022 CLASS A needed the following components:
LANC12xxW12
Component
C1
C2, C3
Value
6.8uF
Voltage
50V
Reference
1210 MLCC
1206 MLCC
1000pF
2KV
LANC24xxW12
Component
C1
C2, C3
Value
4.7uF
Voltage
50V
Reference
1210 MLCC
1206 MLCC
1000pF
2KV
LANC48xxW12
Component
C1
C2, C3
Value
Voltage
100V
Reference
1812 MLCC
1206 MLCC
2.2uF
1000pF
2KV
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Page 9 of 14
TECHNICAL DATASHEET
LANC122.5W12
EMC Considerations (Continued)
Suggested Schematic for EN55022 Conducted Emission Class B limits
Figure 13
Recommended Layout with Input Filter
Figure 14
To meet Conducted Emissions EN55022 CLASS B needed the following components:
LANC12xxW12
Component
C1
Value
3.3µF
Voltage
50V
Reference
1812 MLCC
1206 MLCC
C3, C4
L1
1000pF
325µH
2KV
----
Common Choke, P/N: PMT-050
LANC24xxW12
Component
C1
Value
4.7µF
Voltage
Reference
50V
2KV
----
1812 MLCC
1206 MLCC
Common Choke, P/N: PMT-050
C3, C4
L1
1000pF
325µH
LANC48xxW12
Component
C1
Value
2.2µF
Voltage
Reference
100V
2KV
----
1812 MLCC
1206 MLCC
Common Choke, P/N: PMT-050
C3, C4
L1
1000pF
325µH
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Page 10 of 14
TECHNICAL DATASHEET
LANC122.5W12
Recommended Pad Layout for DIP Type
Figure 15
Recommended Pad Layout for SMT Type
Figure 16
1. All dimensions in Inches (mm)
2. Pin pitch tolerance ±0.35mm
3. Tolerance: x.xx±0.02 (x.x±0.5)
x.xxx±0.01 (x.xx±0.25)
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Page 11 of 14
TECHNICAL DATASHEET
LANC122.5W12
Soldering and Reflow Considerations:
Lead Free Wave Solder Profile for DIP Type
Reference Solder: Sn-Ag-Cu; Sn-Cu
Hand Welding:
Soldering Iron: Power 90W
Welding Time: 2~4 sec
Temp: 380~400°C
Figure 17
TIME (SEC)
Zone
Reference Parameter
Rise temp. speed: 3℃/sec max.
Preheat temp: 100~130℃
Peak temp: 250~260℃
Preheat
Zone
Actual
Heating
Peak time (T1+T2 time): 4~6 sec
Lead free reflow profile for SMT type
Figure 18
TIME (SEC)
Zone
Preheat
Zone
Reference Parameter
Rise temp. speed: 1~3℃/sec
Preheat time: 60~120sec
Preheat temp.155~185℃
Rise temp. speed: 1~3℃/sec
Melting time: 30~60 sec
Melting temp: 217°C
Reference Solder: Sn-Ag-Cu; Sn-Cu
Actual
Heating
Peak temp: 230~240℃
Peak time: 10~20 sec
Rise temp. speed: -1~ -5℃/sec
Cooling
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Page 12 of 14
TECHNICAL DATASHEET
LANC122.5W12
Packaging Information:
Figure 19
DIP Type
16 PCS per tube
SMT Type
Figure 20
16 PCS per tube
Safety and Installation Instruction:
Fusing Consideration
Caution: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone
operation to an integrated part of sophisticated power architecture. To maximum flexibility, internal fusing is not
included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety
agencies require a normal-blow fuse with maximum rating of 3A. Based on the information provided in this data
sheet on Inrush energy and maximum DC input current; the same type of fuse with lower rating can be used.
Refer to the fuse manufacturer’s data for further information.
MTBF and Reliability
The MTBF of the LANCW12 single output series of DC/DC converters has been calculated using Bellcore
TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40°C (Ground fixed and controlled
environment). The resulting figure for MTBF is 2.75 × 106 hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25°C. The resulting figure for MTBF is
1.078 × 106 hours.
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Page 13 of 14
TECHNICAL DATASHEET
LANC122.5W12
Ordering Information:
Part Number Example:
LANC 12 2.5 W 12 - S
Series
Designation
Nominal Input
Voltage
Nominal Output
Voltage
Option
Blank
S
Description
DIP Type
SMT Type
2:1 Wide Input
Voltage Range
Maximum Output
Power
Company Information:
Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and
development engineers will provide a solution that exceeds your performance requirements on-time and on
budget. Our ISO9001-2000 certification is just one example of our commitment to producing a high quality, well
documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for
working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements.
We will continue to provide ongoing support for your project above and beyond the design and production
phases. Give us a call today to discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
ꢀ(603)778-2300
ꢀ(888)587-9255
ꢀ(603)778-9797
E-mail:
Web:
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Address:
(888) 597-WALL
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Page 14 of 14
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