Data Sheet
June 1997
DW025 Triple Output-Series Power Modules:
36 Vdc to 75 Vdc Input; 25 W
Options
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Short pins: 2.79 mm ± 0.25 mm
(0.110 in. ± 0.010 in.)
Negative logic remote on/off
Heat sink available for extended operation
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Description
The DW025 Triple Output-Series Power Modules are
dc-dc converters that operate over an input voltage
range of 36 Vdc to 75 Vdc and provide three outputs.
These modules offer extremely low noise levels with
industry-standard pinouts in a small footprint. Each
highly reliable and efficient unit features remote
on/off and current limit.
The maximum total output power of the DW025 Triple
Output-Series Power Modules is limited to 25 W. The
main output (V
O1
) is designed to deliver the entire
25 W. The auxiliary outputs (V
O2
and V
O3
) can
provide a total of 22.5 W, as long as the total output
power does not exceed 25 W.
Efficiency greater than 80%, a wide operating
temperature range, and a metal case are additional
features of these modules.
The DW025 Triple Output-Series Power Modules use
advanced, surface-mount technology and deliver high-quality,
compact, dc-dc conversion at an economical price.
Features
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Small size: 71.1 mm x 61.0 mm x 12.7 mm
(2.80 in. x 2.40 in. x 0.50 in.)
Low output noise
Industry-standard pinout
Metal case with separate case ground pin
2:1 input voltage range
Remote on/off (positive logic)
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UL
* Recognized,
CSA
†
Certified, and VDE
Licensed
Within FCC and CISPR Class A Radiated Limits
Higher accuracy output voltage clamp set point
CE mark meets 73/23/EEC and 93/68/EEC
directives
‡
*
UL
is a registered trademark of Underwriters Laboratories, Inc.
†
CSA
is a registered trademark of the Canadian Standards Asso-
ciation.
‡ This product is intended for integration into end-use equipment.
All the required procedures for CE marking of end-use equip-
ment should be followed. (The CE mark is placed on selected
products.)
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Applications
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Distributed power architectures
Telecommunications
DW025 Triple Output-Series Power Modules:
36 Vdc to 75 Vdc Input; 25 W
Data Sheet
June 1997
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute 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
Input Voltage Continuous
I/O Isolation Voltage:
dc
Transient (1 minute)
Operating Case Temperature
Storage Temperature
Symbol
V
I
—
—
T
C
T
stg
Min
—
—
—
–40
–55
Max
80
500
850
100
125
Unit
Vdc
V
V
°C
°C
Electrical Specifications
Unless otherwise indicated, specifications apply to all modules over all operating input voltage, resistive load, and
temperature conditions.
Table 1. Input Specifications
Parameter
Operating Input Voltage
Maximum Input Current
(V
I
= 0 V to 75 V; I
O
= I
O, max
)
Inrush Transient
Input Reflected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 µH source impedance;
T
C
= 25 °C; see Figure 18 and Design
Considerations section.)
Input Ripple Rejection (120 Hz)
Symbol
V
I
I
I, max
i
2
t
—
Min
36
—
—
—
Typ
48
—
—
25
Max
72*
2.0
0.2
—
Unit
Vdc
A
A
2
s
mAp-p
—
—
60
—
dB
* Operation is specified to 75 V, provided the minimum load on Output 1 is at least 0.75 A. Safety agency reports specify 75 V maximum input.
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 fus-
ing 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 in series with the ungrounded input
lead. 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
Tyco Electronics Corp.
Data Sheet
June 1997
DW025 Triple Output-Series Power Modules:
36 Vdc to 75 Vdc Input; 25 W
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 20.)
Output Voltage Set Point
(V
I
= 48 V; T
C
= 25 °C;
I
O1
= 2.0 A, I
O2
= I
O3
= 0.5 A)
Device
DW025ABK-M
Symbol
V
O1
V
O2
V
O3
V
O1
V
O2
V
O3
V
O1, set
V
O2, set
V
O3, set
V
O1, set
V
O2, set
V
O3, set
—
V
O1
V
O1
Min
4.80
10.80
–10.80
4.80
13.77
–13.77
4.90
11.83
–11.83
4.90
14.84
–14.84
—
—
—
Typ
—
—
—
—
—
—
5.00
12.20
–12.20
5.00
15.30
–15.30
0.1
0.1
0.5
Max
5.20
13.70
–13.70
5.20
17.20
–17.20
5.10
12.57
–12.57
5.10
15.76
–15.76
0.2
0.2
1.5
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
%
%
%
DW025ACL-M
DW025ABK-M
DW025ACL-M
Output Regulation:
Line (V
I
= 36 V to 75 V)
Load (I
O1
= I
O, min
to I
O, max,
I
O2
= I
O3
= I
O, min
)
Temperature (T
C
= –40 °C to
+100 °C)
Output Ripple and Noise
(See Figure 19.):
RMS
Peak-to-peak (5 Hz to 20
MHz)
Output Current
(At I
O
< I
O, min
, the modules may
exceed output ripple
specifications.)
Output Current-limit Inception
(V
O
= 90% of V
O, nom
and
minimum load on other
outputs.)
Output Short-circuit Current
(V
O
= 1 V and minimum load on
other outputs.)
Efficiency
(V
I
= 48 V; T
C
= 25 °C; see
Figures 13, 14, and 20.):
I
O1
= 2.5 A, I
O2
= I
O3
= 0.5 A
I
O1
= 2.0 A, I
O2
= I
O3
= 0.5 A
All
All
All
All
All
DW025ABK-M
DW025ACL-M
DW025ABK-M
DW025ACL-M
DW025ABK-M
DW025ACL-M
V
O1
V
O2,
V
O3
V
O1
V
O2,
V
O3
I
O1
I
O2,
I
O3
I
O1
I
O2,
I
O3
I
O1
I
O2,
I
O3
I
O1
I
O2,
I
O3
I
O1
I
O2,
I
O3
I
O1
I
O2,
I
O3
—
—
—
—
0.5
0.1
0.5
0.1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6
2
6
2
8
3
8
3
25
30
100
150
5.0
1.0
5.0
0.83
7.5
3.0
7.5
3.0
10.5
4.5
10.5
4.5
mVrms
mVrms
mVp-p
mVp-p
A
A
A
A
A
A
A
A
A
A
A
A
DW025ABK-M
DW025ACL-M
η
η
80
80
82
83
—
—
%
%
Tyco Electronics Corp.
3
DW025 Triple Output-Series Power Modules:
36 Vdc to 75 Vdc Input; 25 W
Data Sheet
June 1997
Electrical Specifications
(continued)
Table 2. Output Specifications
(continued)
Parameter
Dynamic Response
(
∆
I
O
/
∆
t = 1 A/10 µs, V
I
= 48 V,
T
C
= 25 °C):
Load Change from I
O
= 50%
to 75% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10%
peak deviation)
Load Change from I
O
= 50%
to 25% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10%
peak deviation)
Table 3. Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Min
—
10
Typ
0.02
—
Max
—
—
Unit
µF
M
Ω
Device
Symbol
Min
Typ
Max
Unit
All
All
V
O1
—
—
—
80
1
—
—
mV
ms
All
All
V
O1
—
—
—
80
0.5
—
—
mV
ms
General Specifications
Parameter
Calculated MTBF (I
O
= 80% of I
O, max
; T
C
= 40 °C)
Weight
Min
—
Typ
2,906,000
—
Max
113 (4.0)
Unit
hours
g (oz.)
4
Tyco Electronics Corp.
Data Sheet
June 1997
DW025 Triple Output-Series Power Modules:
36 Vdc to 75 Vdc Input; 25 W
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
(V
I
= 0 V to 75 V; open collector or equivalent
compatible; signal referenced to V
I
(–)
terminal. See Figure 21 and Feature
Descriptions.):
DW025XXX-M (positive logic)
Logic Low—Module Off
Logic High—Module On
DW025XXX1-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 (I
on/off
= 0)
Open Collector Switch Specifications:
Leakage Current During Logic High
(V
on/off
= 10 V)
Output Low Voltage During Logic Low
(I
on/off
= 1 mA)
Turn-on Time
(I
O
= 80% of I
O, max
; V
O
within ±1% of steady
state)
Output Voltage Overshoot
Output Overvoltage Clamp
Device
Symbol
Min
Typ
Max
Unit
All
All
All
All
All
All
I
on/off
V
on/off
V
on/off
I
on/off
V
on/off
—
—
0
—
—
—
—
—
—
—
—
—
5
1.0
1.2
10
50
1.2
—
mA
V
V
µA
V
ms
All
DW025ABK-M
DW025ACL-M
—
V
O1
V
O2
V
O3
V
O1
V
O2
V
O3
—
—
—
—
—
—
—
—
90
0
6
15
–15
6
19
–19
—
5
6.8
17
–17
6.8
21
–21
110
%
V
V
V
V
V
V
%V
o, nom
Output Voltage Set-point Adjustment Range
All
Tyco Electronics Corp.
5
Embedded System
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