VISHAY AA-M

Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Options
n
n
Higher-accuracy output voltage clamp set point
Short pins: 2.79 mm ± 0.25 mm
(0.110 in. ± 0.010 in.)
n
Heat sink available for extended operation
n
Negative logic remote on/off
Description
The DW025-Series Power Modules use advanced, surfacemount technology and deliver high-quality, compact, dc-dc
conversion at an economical price.
Features
n
Small size: 71.1 mm x 61.0 mm x 12.7 mm
(2.80 in. x 2.40 in. x 0.50 in.)
n
Low output noise
n
Industry-standard pinout
n
Metal case with separate case ground pin
n
2:1 input voltage range
n
Remote on/off (positive logic)
n
n
n
n
UL* Recognized, CSA † Certified, and VDE
Licensed
Within FCC and CISPR Class A Radiated Limits
CE mark meets 73/23/EEC and 93/68/EEC
directives‡
Two tightly regulated outputs
The DW025-Series Power Modules are a family of
dc-dc converters that operate over an input voltage
range of 36 Vdc to 75 Vdc and provide two regulated
outputs. These modules offer low noise levels with
industry-standard pinouts in a small footprint. Each
highly reliable and efficient unit features remote
on/off and current limit.
Each output is individually regulated by its own control circuit and has an independent overvoltage
clamp. With standard outputs of +3.3 V, ±5 V, ±12 V,
and ±15 V, the DW025-Series is flexible enough to
provide modified standard units with any combination
of output voltages from 2 V to 15 V.
Efficiency greater than 80%, a wide operating temperature range, and a metal case are additional features of these modules. They have UL, CSA, and
VDE recognition and operate within FCC and CISPR
Class A limits for radiated emissions.
The DW025AJ-M, BK-M, and CL-M Power Modules
are available with common output ground pins
(pinout A); the DW025AA-M, AB-M, AF-M, BB-M,
and CC-M Power Modules are available with separate output ground pins (pinout B).
Applications
n
Distributed power architectures
n
Telecommunications
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of the Canadian Standards Association.
‡ This product is intended for integration into end-use equipment.
All the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on selected
products.)
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Symbol
Min
Max
Unit
Input Voltage
Continuous
Transient (<10 ms)
VI
VI, trans
—
—
80
100
V
V
I/O Isolation Voltage
dc
Transient (1 minute)
—
—
—
—
500
850
V
V
Operating Case Temperature
TC
–40
100
°C
Storage Temperature
Tstg
–55
125
°C
Electrical Specifications
Note: Two pinouts are available for the DW025-Series Power Modules. The DW025AJ-M, AB-M, BK-M, and
CL-M Power Modules, which have both positive and negative outputs, have a common output ground pin
(pinout A). The DW025AA-M, AB-M, AF-M, BB-M, and CC-M Power Modules, which have dual positive outputs, have separate output ground pins (pinout B). See Outline Diagrams section.
Unless otherwise indicated, specifications apply to all modules over all operating input voltage, resistive load, and
temperature conditions.
Table 1. Input Specifications
Parameter
Symbol
Min
Typ
Max
Unit
VI
36
48
75
Vdc
II, max
—
—
2.0
A
Inrush Transient
i2 t
—
—
0.8
A2s
Input Reflected-ripple Current, Peak-to-Peak
(5 Hz to 20 MHz, 12 µH source impedance;
TC = 25 °C) (See Figure 11 and Design
Considerations section.)
—
—
25
—
mAp-p
Input Ripple Rejection (120 Hz)
—
—
60
—
dB
Operating Input Voltage
Maximum Input Current
(VI = 0 V to 75 V; IO = IO, max; see Figure 1.)
Fusing Considerations
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 a sophisticated power architecture. To preserve 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, dc fuse with a maximum rating of 5 A (see Safety Considerations section).
Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same
type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data for further information.
2
Lineage Power
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Electrical Specifications (continued)
Table 2. Output Specifications
Parameter
Output Voltage
(Over all operating input voltage,
resistive load, and temperature
conditions until end of life. See
Figure 13.)
Device
Symbol
Min
Typ
Max
Unit
DW025AJ-M
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
4.80
– 4.80
11.40
– 11.40
14.25
–14.25
4.80
4.80
4.80
11.40
4.80
3.16
11.40
11.40
14.25
14.25
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5.25
–5.25
12.60
–12.60
15.75
–15.75
5.25
5.25
5.25
12.60
5.25
3.45
12.60
12.60
15.75
15.75
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
VO1, set
VO2, set
4.90
– 4.90
11.76
–11.76
14.70
–14.70
4.90
4.90
4.90
11.76
4.90
3.23
11.76
11.76
14.70
14.70
5.0
–5.0
12.0
–12.0
15.0
–15.0
5.0
5.0
5.0
12.0
5.0
3.3
12.0
12.0
15.0
15.0
5.10
–5.10
12.24
–12.24
15.30
–15.30
5.10
5.10
5.10
12.24
5.10
3.37
12.24
12.24
15.30
15.30
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
All
All
—
—
—
—
0.1
0.1
0.2
0.4
%
%
DW025AJ-M,
AA-M, BK-M,
BB-M, CL-M,
CC-M, AB-M
—
—
0.1
0.4
%
DW025AF-M
—
—
0.4
0.8
%
DW025AJ-M,
AA-M, AF-M
—
—
15
70
mV
DW025BK-M,
BB-M
—
—
40
150
mV
DW025CL-M,
CC-M
—
—
40
190
mV
DW025AB-M
(5 V output)
—
—
15
70
mV
DW025AB-M
(12 V output)
—
—
40
150
mV
DW025BK-M
DW025CL-M
DW025AA-M
DW025AB-M
DW025AF-M
DW025BB-M
DW025CC-M
Output Voltage Set Point
(VI = 48 V; IO = IO, max; TA = 25 °C)
DW025AJ-M
DW025BK-M
DW025CL-M
DW025AA-M
DW025AB-M
DW025AF-M
DW025BB-M
DW025CC-M
Output Regulation:
Line (VI = 36 V to 75 V)
Load (IO1 = IO, min to IO, max, IO2 = IO, max)
Load (IO2 = IO, min to IO, max, IO1 = IO, max)
Temperature
(TC = – 40 °C to +100 °C)
Lineage Power
3
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Electrical Specifications (continued)
Table 2. Output Specifications (continued)
Parameter
Output Ripple and Noise
(See Figure 12.):
RMS
Peak-to-peak (5 Hz to 20 MHz)
Output Current
(At IO < IO, min, the modules may exceed
output ripple specifications.)
Output Current-limit Inception
(VO = 90% of VO, nom; see Figure 2.)
Output Short-circuit Current
(VO = 250 mV)
Efficiency (VI = 48 V; IO = IO, max;
TC = 25 °C; see Figures 3 and 13.)
4
Device
Symbol
Min
Typ
Max
Unit
DW025AJ-M,
AA-M, AF-M
—
—
—
15
mVrms
DW025BK-M, BB-M
—
—
—
20
mVrms
DW025CL-M, CC-M
—
—
—
25
mVrms
DW025AB-M
(5 V output)
—
—
—
15
mVrms
DW025AB-M
(12 V output)
—
—
—
20
mVrms
DW025AJ-M,
AA-M, AF-M
—
—
—
150
mVp-p
DW025BK-M, BB-M
—
—
—
200
mVp-p
DW025CL-M, CC-M
—
—
—
250
mVp-p
DW025AB-M
(5 V output)
—
—
—
150
mVp-p
DW025AB-M
(12 V output)
—
—
—
200
mVp-p
DW025AJ-M,
AA-M, AF-M
IO1
IO2
0.20
0.20
—
—
2.50
2.50
A
A
DW025BK-M, BB-M
IO1
IO2
0.10
0.10
—
—
1.04
1.04
A
A
DW025CL-M, CC-M
IO1
IO2
0.08
0.08
—
—
0.83
0.83
A
A
DW025AB-M
IO1
IO2
0.20
0.10
—
—
2.50
1.04
A
A
DW025AJ-M,
AA-M, AF-M
—
—
3.7
6.5
A
DW025BK-M, BB-M
—
—
1.5
2.9
A
DW025CL-M, CC-M
—
—
1.3
2.7
A
DW025AB-M
IO1
IO2
—
—
3.7
1.5
6.5
2.9
A
A
DW025AJ-M,
AA-M, AF-M
—
—
3.5
7.0
A
DW025BK-M, BB-M
—
—
1.0
3.0
A
DW025CL-M, CC-M
—
—
1.0
3.0
A
DW025AB-M
IO1
IO2
—
—
3.5
1.0
7.0
3.0
A
A
DW025AJ-M, AA-M
η
75
78
—
%
DW025AF-M
η
68
75
—
%
DW025AB-M
η
75
79
—
%
DW025BK-M, BB-M
η
79
82
—
%
DW025CL-M, CC-M
η
79
82
—
%
Lineage Power
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Electrical Specifications (continued)
Table 2. Output Specifications (continued)
Parameter
Device
Symbol
Min
Typ
Max
Unit
DW025AJ-M,
AA-M, AF-M
—
—
160
—
mV
DW025BK-M,
BB-M
—
—
250
—
mV
DW025CL-M,
CC-M
—
—
250
—
mV
DW025AB-M
(5 V output)
—
—
160
—
mV
DW025AB-M
(12 V output)
—
—
250
—
mV
All
—
—
3
—
ms
DW025AJ-M,
AA-M, AF-M
—
—
160
—
mV
DW025BK-M,
BB-M
—
—
250
—
mV
DW025CL-M,
CC-M
—
—
250
—
mV
DW025AB-M
(5 V output)
—
—
160
—
mV
DW025AB-M
(12 V output)
—
—
250
—
mV
All
—
—
3
—
ms
Dynamic Response
(ýIO/ýt = 1 A/10 µs, VI = 48 V,
TA = 25 °C):
Load Change from IO = 50% to 75% of
IO, max: (See Figures 7 to 9.):
Peak Deviation
Settling Time (VO < 10% peak
deviation)
Load Change from IO = 50% to 25% of
IO, max (See Figures 4 to 6.):
Peak Deviation
Settling Time (VO < 10% peak
deviation)
Table 3. Isolation Specifications
Parameter
Min
Typ
Max
Unit
Isolation Capacitance
—
1200
—
pF
Isolation Resistance
10
—
—
M¾
Max
Unit
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C)
Weight
Lineage Power
Typ
2,800,000
—
—
hours
113 (4.0)
g (oz.)
5
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions and Design Considerations for further information.
Parameter
Remote On/Off (positive logic)
(VI = 0 V to 75 V; open collector or
equivalent compatible; signal
referenced to VI(–) terminal. See
Figures 10, 14 and Feature
Descriptions.):
DW025xx-M Positive Logic:
Logic Low—Module Off
Logic High—Module On
DW025xx1-M Negative Logic:
Logic Low—Module On
Logic High—Module Off
Module Specifications:
On/Off Current—Logic Low
On/Off Voltage:
Logic Low
Logic High (Ion/off = 0)
Open Collector Switch Specifications:
Leakage Current During Logic High
(Von/off = 10 V)
Output Low Voltage During Logic
Low (Ion/off = 1 mA)
Turn-on Time (IO = 80% of IO, max; VO
within ±1% of steady state)
Output Voltage Overshoot
Output Overvoltage Clamp
Device
Symbol
Min
Typ
Max
Unit
All
Ion/off
—
—
1.0
mA
All
All
Von/off
Von/off
0
—
—
—
1.2
10
V
V
All
Ion/off
—
—
50
µA
All
Von/off
—
—
1.2
V
All
—
—
30
—
ms
All
—
—
0
5
%
DW025AJ-M
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
VO1
VO2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
7
–7
16
–16
20
–20
7
7
7
16
7
5
16
16
20
20
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
VUVLO
VUVLO
—
20
28
28
36
—
V
V
DW025BK-M
DW025CL-M
DW025AA-M
DW025AB-M
DW025AF-M
DW025BB-M
DW025CC-M
Input Undervoltage Lockout:
Module On
Module Off
6
All
All
Lineage Power
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Characteristic Curves
85
INPUT CURRENT, II (A)
VO
1.0
1.0
0.8
0.8
0.6
0.6
II
0.4
0.4
0.2
0.2
0
0.0
0
10
20
30
40
50
60
NORMALIZED OUTPUT VOLTAGE
1.2
EFFICIENCY, η (%)
80
1.2
75
70
CC,CL
BB,BK
AA,AJ
AF
65
60
55
50
45
0.1
70
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
NORMALIZED BOTH OUTPUT CURRENTS TO
FULL LOAD, IO (A)
INPUT VOLTAGE, VI (V)
8-993(C).a
8-995(C)
Figure 3. DW025-Series Efficiency vs. Normalized
Both Output Currents to Full Load at
VI = 48 V and TA = 25 °C
OUTPUT VOLTAGE, VO (mV)
(50 mV/div)
1.2
1.0
0.8
0.6
VO = 3.3 V
5V
12 V
15 V
0.4
50 mV
5.0 V
0.2
0.0
0.0
0.5
1.0
1.5
2.0
2.5
NORMALIZED OUTPUT CURRENT TO FULL LOAD, IO (A)
8-994(C)
Figure 2. DW025-Series Normalized Output Current
vs. Normalized Output Voltage at
VI = 48 V and TA = 25 °C
OUTPUT CURRENT, IO (A)
(0.5 A/div)
NORMALIZED OUTPUT VOLTAGE, VO (V)
Figure 1. DW025-Series Input Current and Normalized Output Voltage vs. Input Voltage at
Full Load and TA = 25 °C
1.0 A
∆IO
= 1 A/10 µs
∆t
0.5 A
0.5 ms
0.5 A
TIME, t (0.5 ms/div)
8-1019(C)
Figure 4. DW025-Series Typical 5 V Output Voltage
Response to a Step Load Change from
50% to 25% of IO, max at VI = VI, nom and
TA = 25 °C
Characteristic Curves (continued)
Lineage Power
7
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (mV)
(0.5 A/div)
(50 mV/div)
OUTPUT CURRENT, IO (A)
(0.2 A/div)
OUTPUT VOLTAGE, VO (V)
(0.1 V/div)
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
100 mV
12.0 V
0.416 A
∆IO
= 1 A/10 µs
∆t
0.208 A
0.2 A
0.5 ms
Data Sheet
April 2008
50 mV
5.0 V
1.5 A
∆IO
= 1 A/10 µs
∆t
1.0 A
0.5 ms
0.5 A
TIME, t (0.5 ms/div)
8-1017(C)
TIME, t (0.5 ms/div)
8-1018(C)
OUTPUT VOLTAGE, VO (V)
(0.1 V/div)
100 mV
15.0 V
0.333 A
∆IO= 1 A/10 µs
∆t
0.166 A
0.2 A
0.5 ms
TIME, t (0.5 ms/div)
8-1017(C).a
Figure 6. Typical DW025-Series 15 V Output Voltage
Response to a Step Load Change from
50% to 25% of IO, max at VI = VI, nom and
TA = 25 °C
8
Figure 7. Typical DW025-Series 5 V Output Voltage
Response to a Step Load Change from
50% to 75% of IO, max at VI = VI, nom and
TA = 25 °C
OUTPUT CURRENT, IO (A)
(0.2 A/div)
OUTPUT CURRENT, IO (A)
(0.2 A/div)
OUTPUT VOLTAGE, VO (V)
(0.1 V/div)
Figure 5. Typical DW025-Series 12 V Output Voltage
Response to a Step Load Change from
50% to 25% of IO, max at VI = VI, nom and
TA = 25 °C
100 mV
12.0 V
0.624 A
∆IO
= 1 A/10 µs
∆t
0.416 A
0.2 A
0.5 ms
TIME, t (0.5 ms/div)
8-1017(C).b
Figure 8. Typical DW025-Series 12 V Output Voltage
Response to a Step Load Change from
50% to 75% of IO, max at VI = VI, nom and
TA = 25 °C
Lineage Power
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
OUTPUT VOLTAGE, VO (V)
(0.1 V/div)
Characteristic Curves (continued)
Test Configurations
TO OSCILLOSCOPE
100 mV
LTEST
V I (+)
12 µH
15.0 V
BATTERY
CS 220 µF
IMPEDANCE < 0.1 Ω
@ 20 °C, 100 kHz
OUTPUT CURRENT, IO (A)
(0.2 A/div)
V I (–)
0.500 A
∆IO
= 1 A/10 µs
∆t
0.333 A
8-489(C).a
Note: Measure input reflected-ripple current with a simulated source
impedance (LTEST) of 12 µH. Capacitor CS offsets possible
battery impedance. Current is measured at the input of the
module.
0.2 A
Figure 11. Input Reflected-Ripple Test Setup
0.5 ms
TIME, t (0.5 ms/div)
8-1018(C).a
NORMALIZED
OUTPUT VOLTAGE, VO
Figure 9. Typical DW025-Series 15 V Output Voltage
Response to a Step Load Change from
50% to 75% of IO, max at VI = VI, nom and
TA = 25 °C
VO, set
REMOTE ON/OFF,
Von/off (V) (2 V/div)
0V
2V
0V
∆IO
= 1 A/10 µs
∆t
1 ms
TIME, t (1 ms/div)
8-1020(C)
Figure 10. Typical DW025-Series Output Voltage
Rise Time with Remote On/Off at
VI = VI, nom, IO = 0.8 (IO, max) and TA = 25 °C
Lineage Power
9
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Test Configurations (continued)
CONTACT AND
DISTRIBUTION LOSSES
VO1
V I (+)
LOAD
IO
II
COPPER STRIP
COM
SUPPLY
VO1(+)
LOAD
0.1 µF
SCOPE
RLOAD1
VO2
VI(–)
CONTACT
RESISTANCE
COMM
8-753(C)
0.1 µF
SCOPE
RLOAD2
VO2(–)
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
In addition, VI(–) is internally connected to case.
2
∑
8-808(C)
A. Pinout A (DW025AJ-M, BK-M, CL-M) Configuration
Pinout A
η
∑
VO1(+)
SCOPE
RLOAD1
VO1(–)
VO2(+)
0.1 µF
=1
= J------------------------------------------------x 100
[VI(+) – VI(–)]II -
2
COPPER STRIP
0.1 µF
[ V OJ – COM ] I OJ
SCOPE
RLOAD2
Pinout B
η
[ V OJ ( + ) – V OJ ( – ) ] I OJ
J=1
= -------------------------------------------------------------- x 100
[VI(+) – VI(–)]II
Figure 13. Output Voltage and Efficiency Measurement Test Setup
VO2(–)
Design Considerations
8-809(C)
B. Pinout B (DW025AA-M, AB-M, AF-M, BB-M,
CC-M) Configuration
Note: Use a 0.1 µF ceramic capacitor. Scope measurement should
be made by using a BNC socket. Position the load between
50 mm (2 in.) and 75 mm (3 in.) from the module.
Figure 12. Output Noise Measurement Test Setup
10
Input Source Impedance
The power module should be connected to a low acimpedance input source. Highly inductive source
impedances can affect the stability of the power module. A 33 µF electrolytic capacitor (ESR < 0.7 Ω at
100 kHz) mounted close to the power module helps
ensure stability of the unit.
Lineage Power
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Design Considerations (continued)
Current Limit
Safety Considerations
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting
circuitry and can endure current-limiting for an unlimited
duration. At the point of current-limit inception, the unit
shifts from voltage control to current control. If the output voltage is pulled very low during a severe fault, the
current-limit circuit can exhibit either foldback or tailout
characteristics (output current decrease or increase).
The unit operates normally once the output current is
brought back into its specified range.
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e., UL-1950, CSA 22.2-950, EN60950.
For the converter output to be considered to be meeting the requirements of safety extra-low voltage
(SELV), one of the following must be true:
■
All inputs are SELV and floating with the output also
floating.
■
All inputs are SELV and grounded with the output
also grounded.
■
Any non-SELV input must be provided with reinforced insulation from any other hazardous voltages,
including the ac mains, and must have a SELV reliability test performed on it in combination with the
converters.
If the input meets extra-low voltage (ELV) requirements, then the converter’s output is considered ELV.
The input to these units is to be provided with a maximum 5 A normal-blow fuse in the ungrounded lead.
Input/Output Voltage Reversal
CAUTION: Applying a reverse voltage across the
module input or output forward biases
an internal diode. Attempting to start
the module under this condition can
damage the module.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic high
voltage on the remote on/off pin, and off during a logic
low. Negative logic remote on/off, code suffix “1,” turns
the module off during a logic high and on during a logic
low.
To turn the power module on and off, the user must
supply a switch to control the voltage between the
on/off terminal and the VI(–) terminal (Von/off). The
switch can be an open collector or equivalent (see
Figure 14). A logic low is Von/off = 0 V to 1.2 V. The
maximum Ion/off during a logic low is 1 mA. The switch
should maintain a logic-low voltage while sinking 1 mA.
During a logic high, the maximum Von/off generated by
the power module is 10 V. The maximum allowable
leakage current of the switch at Von/off = 10 V is 50 µA.
VI(+)
VI(–)
–
Feature Descriptions
Output Overvoltage Clamp
The output overvoltage clamp consists of control
circuitry, independent of the primary regulation loop,
that monitors the voltage on the output terminals. The
control loop of the clamp has a higher voltage set point
than the primary loop (see Feature Specifications
table). This provides a redundant voltage control that
reduces the risk of output overvoltage.
Lineage Power
VO1
LOAD
Von/off
COM
+
Ion/off
LOAD
ON/OFF
VO2
8-754(C)
Figure 14. Remote On/Off Implementation
11
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Thermal Considerations
WIND TUNNEL WALL
MEASURE CASE
TEMPERATURE AT
CENTER OF UNIT
AIRFLOW
CONNECTORS TO
LOADS, POWER
SUPPLIES, AND
DATALOGGER,
6.35 (0.25) TALL
203.2
(8.00)
AIRFLOW
50.8
(2.00)
101.6
(4.00)
AIR VELOCITY PROBE
AMBIENT TEMPERATURE
THERMOCOUPLE
12.7 (0.50)
203.2 (8.00)
9.7 (0.38)
19.1 (0.75)
8-866(C).a
Note: Dimensions are in millimeters and (inches). Drawing is not to scale.
Figure 15. Thermal Test Setup
The 25 W dual output power modules are designed to
operate in a variety of thermal environments. As with
any electronic component, sufficient cooling must be
provided to help ensure reliable operation of the unit.
Heat-dissipating components inside the module are
thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding
environment.
12
The thermal data presented is based on measurements taken in a wind tunnel. The test setup shown in
Figure 15 was used to collect data. Actual performance
can vary depending on the particular application
environment.
Lineage Power
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Thermal Considerations (continued)
Air Velocity
Basic Thermal Performance
The air velocity required to maintain a desired maximum case temperature for a given power dissipation
and ambient temperature can be calculated using
Figure 21 and the following equation:
The DW025-Series Dual Output Power Modules have a
separate power stage for each of the outputs. This
means that the maximum operating temperature can
be predicted quite closely by treating each output individually and then summing the results. Figures 16
through 21 are used to predict the safe operating condition for many different operating and environmental
conditions.
The method used to determine the maximum ambient
temperature at a given air velocity is a four-step process.
1. Find the power dissipated for output 1 by using the
appropriate chart (Figures 16 through 19) for a particular output condition (IO1).
2. Repeat step 1 for output 2 using Figures 16 through
19.
3. Find the total power dissipated by summing the
power dissipated on each of the outputs:
(PDOUT1 + PDOUT2) = PDtotal
T C, max – T A
P D total
θCA = -------------------------------where θCA is the thermal resistance from case-to-ambient air (°C/W), TC, max is the desired maximum case
temperature (°C), TA is the ambient inlet temperature
(°C), and PDtotal is the total power dissipated from the
module (W).
For example, to maintain a maximum case temperature
of 85 °C with an ambient inlet temperature of 55 °C and
a power dissipation of 6.7 W, the thermal resistance is:
85 °C – 55 °C
θCA ≤ ------------------------------------ = 4.5 °C/W
6.7 W
This corresponds to an air velocity greater than
0.46 ms–1 (90 fpm) in Figure 21.
4. Use the total power dissipated with Figure 20 to
determine the maximum ambient temperature at different air velocities.
For example, the DW025AF-M power module operating
at full load on both outputs with 54 V input has a power
dissipation of 3.6 W (from Figure 17) plus 3.1 W (from
Figure 16) for a total of 6.7 W. Using Figure 20, it can
be determined that the maximum ambient temperature
at natural convection that the DW025AF-M can operate
at is approximately 56 °C.
Keep in mind that these are approximations of the temperatures and airflows required to keep the case temperature below its maximum rating. The maximum case
temperature at the point shown in Figure 15 must be
kept at 100 °C or less.
Lineage Power
13
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Thermal Considerations (continued)
3.0
POWER DISSIPATION, PD (W)
Air Velocity (continued)
POWER DISSIPATION, PD (W)
4.0
3.5
3.0
VI = 72 V
VI = 54 V
VI = 36 V
2.5
2.0
2.5
2.0
1.5
VI = 36 V
1.0
VI = 54 V
VI = 72 V
0.5
0.0
0.0
1.5
0.2
0.4
1.0
0.6
1.0
0.8
1.2
OUTPUT CURRENT, IO (A)
8-1005(C).a
0.5
0
0
0.5
1.0
1.5
2.0
2.5
Figure 18. 12 V Output Power Dissipation vs.
Output Current
OUTPUT CURRENT, IO (A)
8-986(C).a
Figure 16. 3.3 V Output Power Dissipation vs.
Output Current
POWER DISSIPATION, PD (W)
3.0
POWER DISSIPATION, PD (W)
4.0
3.5
3.0
VI = 72 V
VI = 54 V
VI = 36 V
2.5
2.0
1.5
2.5
2.0
1.5
VI = 36 V
VI = 54 V
VI = 72 V
1.0
0.5
0.0
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
OUTPUT CURRENT, IO (A)
0.5
8-999(C).a
0
0
0.5
1.0
1.5
2.0
2.5
Figure 19. 15 V Output Power Dissipation vs.
Output Current
OUTPUT CURRENT, IO (A)
8-987(C).a
Figure 17. 5 V Output Power Dissipation vs. Output
Current
14
Lineage Power
Data Sheet
April 2008
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Use of Heat Sinks and Cold Plates
Air Velocity (continued)
The DW025-Series case includes through-threaded
M3 x 0.5 mounting holes allowing attachment of heat
sinks or cold plates from either side of the module. The
mounting torque must not exceed 0.56 N/m (5 in.-lb.).
TOTAL POWER DISSIPATION, PD (W)
Thermal Considerations (continued)
10.0
9.0
The following thermal model can be used to determine
the required thermal resistance of the sink to provide
the necessary cooling:
8.0
7.0
6.0
2.03 ms –1 (400 ft./min)
4.0 1.02 ms –1 (200 ft./min)
–1
3.0 0.51 ms (100 ft./min)
0.31 ms –1 (60 ft./min)
2.0
NATURAL
CONVECTION
1.0
PD
50
60
70
80
90
100
LOCAL AMBIENT TEMPERATURE, TA (°C)
8-988(C)
Figure 20. Total Power Dissipation vs. Local
Ambient Temperature and Air Velocity
TA
θSA
where PD is the power dissipated by the module, θCS
represents the interfacial contact resistance between
the module and the sink, and θSA is the sink-to-ambient
thermal impedance (°C/W). For thermal grease or foils,
a value of θCS = 0.1 °C/W—0.3 °C/W is typical.
The required θSA is calculated from the following equation:
θSA = [(Tc – TA)/PD] – θCS
Note that this equation assumes that all dissipated
power must be shed by the heat sink. Depending on
the user-defined application environment, a more accurate model including heat transfer from the sides and
bottom of the module can be used. This equation provides a conservative estimate in such instances.
7.0
THERMAL RESISTANCE CASE
TO AMBIENT (°C/W)
l
θCS
0.0
40
Ts
Tc
5.0
6.0
5.0
For further information, refer to the Thermal Energy
Management CC-, CW-, DC-, and DW-Series 25 W
to 30 W Board-Mounted Power Modules Technical
Note.
4.0
3.0
2.0
1.0
0.0
NAT 0.25
CONV (50)
0.51 0.76
(100) (150)
1.02
(200)
1.27 1.52 1.78 2.03
(250) (300) (350) (400)
VELOCITY ms –1 (ft./min.)
8-989(C)
Figure 21. Case-to-Ambient Thermal Resistance vs.
Air Velocity
Lineage Power
15
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Outline Diagrams
Dimensions are in millimeters and (inches).
Copper paths must not be routed beneath the power module standoffs.
Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.).
Pinout A (DW025AJ-M, BK-M, CL-M)
Top View
71.1 (2.80) MAX
PIN 1 INDICATOR
61.0
(2.40)
MAX
M3
DC-DC Power Module
MADE IN USA
Side View
0.51
(0.020)
12.7 (0.50)
MAX
5.1 (0.20)
MIN
Bottom View
1.02 (0.040) ± 0.08 (0.003) DIA
TIN-PLATED
BRASS, 8 PLACES
STAND-OFF,
4 PLACES
4.8 (0.19)
5.1 (0.20)
7.1 (0.28)
5
VO2(–)
4
20.32
(0.800)
VI(–)
10.16 (0.400)
3
6
VI(+)
10.16 (0.400)
2
20.32
(0.800)
50.8
(2.00)
7
ON/OFF
20.32
(0.800)
VO1(+)
CASE
1
30.5
(1.20)
COM
10.16
(0.400)
MOUNTING INSERTS
M3 x 0.5 THROUGH,
4 PLACES
8
NC
48.3 (1.90)
11.4 (0.45)
63.50 ± 0.38 (2.500 ± 0.015)
3.8 (0.15)
8-845(C).a
16
Lineage Power
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Outline Diagrams (continued)
Dimensions are in millimeters and (inches).
Copper paths must not be routed beneath the power module standoffs.
Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.).
Pinout B (DW025AA-M, AB-M, AF-M, BB-M, CC-M)
Top View
71.1 (2.80) MAX
PIN 1 INDICATOR
Lucent
61.0
(2.40)
MAX
M3
DC-DC Power Module
MADE IN USA
Side View
12.7 (0.50)
MAX
0.51
(0.020)
5.1 (0.20)
MIN
Bottom View
1.02 (0.040) ± 0.08 (0.003) DIA
TIN-PLATED
BRASS, 9 PLACES
STAND-OFF,
4 PLACES
4.8 (0.19)
5.1 (0.20)
7.1 (0.28)
5
VO2(–)
4
6
VO2(+)
VI(–)
10.16 (0.400)
10.16 (0.400)
7
3
VI(+)
VO1(–)
CASE
VO1(+)
10.16 (0.400)
20.32
(0.800)
50.8
(2.00)
10.16 (0.400)
2
8
1
30.5
(1.20)
20.32
(0.800)
ON/OFF
MOUNTING INSERTS
M3 x 0.5 THROUGH,
4 PLACES
NC
20.32
(0.800)
9
48.3 (1.90)
11.4 (0.45 )
63.50 ± 0.38 (2.500 ± 0.015)
3.8 (0.15)
8-846(C).a
Lineage Power
17
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Recommended Hole Patterns
Component-side footprint.
Dimensions are in millimeters and (inches).
Recommended hole size for pin: 1.27 mm (0.050 in.).
Pinout A (DW025AJ-M, BK-M, CL-M)
M3 x 0.5 CLEARANCE HOLE
4 PLACES (OPTIONAL)
CASE OUTLINE
1
8
2
7
3
6
30.5
(1.20)
20.32
(0.800)
10.16 (0.400)
61.0
(2.40)
MAX
10.16 (0.400 )
4
10.16
(0.400) 20.32
(0.800)
50.8
(2.00)
20.32
(0.800)
5
5.1 (0.20)
48.3 (1.90)
11.4 (0.45)
63.50 ± 0.38 (2.500 ± 0.015)
3.8 (0.15)
71.1 (2.80) MAX
8-845(C).a
Pinout B (DW025AA-M, AB-M, AF-M, BB-M, CC-M)
CASE OUTLINE
CASE OUTLINE
M3 x 0.5 CLEARANCE HOLE
4 PLACES (OPTIONAL)
1
9
2
8
3
7
4
6
30.5
(1.20)
20.32
(0.800)
10.16 (0.400)
61.0
(2.40)
MAX
20.32
(0.800)
10.16 (0.400)
10.16 (0.400)
50.8
(2.00)
10.16 (0.400)
20.32
(0.800)
5
5.1 (0.20 )
48.3 (1.90)
11.4 (0.45)
63.50 ± 0.38 (2.500 ± 0.015)
3.8 (0.15)
71.1 (2.80) MAX
8-846(C).a
18
Lineage Power
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
Ordering Information
Table 4. Ordering Information Table
Input
Voltage
Output
Voltage
Output
Power
Remote
On/Off Logic
Device Code
Pinout
Comcode
36 V to 75 V
5.0 V, –5.0 V
25 W
positive
DW025AJ-M
A
107587545
36 V to 75 V
12.0 V, –12.0 V
25 W
positive
DW025BK-M
A
107587602
36 V to 75 V
15.0 V, –15.0 V
25 W
positive
DW025CL-M
A
107587628
36 V to 75 V
5.0 V, –5.0 V
25 W
positive
DW025AA-M
B
107731598
36 V to 75 V
5.0 V, 3.3 V
25 W
positive
DW025AF-M
B
107587529
36 V to 75 V
12.0 V, 12.0 V
25 W
positive
DW025BB-M
B
107587586
36 V to 75 V
15.0 V, 15.0 V
25 W
positive
DW025CC-M
B
TBD
36 V to 75 V
5.0 V, 12.0 V
25 W
positive
DW025AB-M
B
107587503
Optional features may be ordered using the device code suffixes shown below. To order more than one option, list
suffixes in numerically descending order followed by the -M suffix, indicating metric (M3 x 0.5 heat sink hardware).
The heat sinks designed for this package have an M prefix, i.e., MHSTxxx45 and MHSLxxx45 (see Thermal
Energy Management CC-, CW-, DC-, and DW-Series 25 W to 30 W Board-Mounted Power Modules Technical
Note).
Table 5. Options Table
Option
Short pins: 2.79 mm ± 0.25 mm
(0.110 in. ± 0.010 in.)
Negative Remote on/off logic
Device Code
Suffix
8
1
Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability.
Lineage Power
19
DW025 Dual Output-Series Power Modules: dc-dc Converters;
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
Data Sheet
April 2008
A sia-Pacific Head qu art ers
T el: +65 6 41 6 4283
World W ide Headq u arters
Lin eag e Po wer Co rp oratio n
30 00 Sk yline D riv e, Mes quite, T X 75149, U SA
+1-800-526-7819
(Outs id e U .S.A .: +1- 97 2-2 84 -2626)
www.line ag ep ower.co m
e-m ail: tech sup [email protected] lin ea gep ower.co m
Eu ro pe, M id dle-East an d Afric a He ad qu arters
T el: +49 8 9 6089 286
Ind ia Head qu arters
T el: +91 8 0 28411633
Lineage Power reserves the right to make changes to the produc t(s) or information contained herein without notice. No liability is ass umed as a res ult of their use or
applic ation. No rights under any patent acc ompany the sale of any s uc h pr oduct(s ) or information.
© 2008 Lineage Power Corpor ation, (Mesquite, Texas ) All International Rights Res er ved.
April 2008
DS96-078EPS (Replaces DS96-077EPS)