Data Sheet
November 2001
HW025 Dual Positive Output-Series Power Modules: dc-dc Converter:
36 Vdc to 75 Vdc Input, Dual Positive Outputs; 25 W
Features
I
I
Low profile
Small size: 54.4 mm x 57.4 mm x 7.5 mm
(2.14 in. x 2.26 in. x 0.29 in.)
High efficiency: 85% typical
Two tightly regulated outputs
Flexible current allocation between outputs
Fixed frequency
Remote on/off
Output voltage adjustment (trim)
Output overcurrent protection
Overtemperature protection
Meets the voltage isolation requirements for
ETSI 300-132-2 and complies with and is Licensed
for Basic Insulation rating per EN60950 (-B option)
Wide operating temperature range
(–40 °C to 100 °C)
UL
*
60950 Recognized,
CSA
†
C22.2 No. 60950-00
Certified, and
VDE
‡
0805 (EN60950)
Licensed
CE mark meets 73/23/EEC and 93/68/EEC
directives
§
I
I
I
I
I
I
I
I
The HW025 Dual Positive Output-Series Power Modules use
advanced, surface-mount technology and deliver high-quality,
efficient, and compact dc-dc conversion.
Applications
I
I
I
I
Distributed power architectures
Communications equipment
Computer equipment
I
I
Options
I
I
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Remote on/off logic choice (positive or negative)
Surface Mount
Basic Insulation
I
Description
The HW025 Dual Positive Output-Series Power Modules are open frame dc-dc converters that operate over an
input voltage range of 36 Vdc to 75 Vdc and provide two, independent, precisely regulated positive outputs.
The modules have a maximum power rating of 25 W with a typical full-load efficiency of 85%. The circuit
architecture allows power to be traded between the two outputs, while maintaining a high efficiency.
*
UL
is a registered trademark of Underwriters Laboratories, Inc.
†
CSA
is a registered trademark of Canadian Standards Association.
‡
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
§ 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.)
HW025 Dual Positive Output-Series Power Modules: dc-dc Converters:
36 Vdc to 75 Vdc Input, Dual Positive Outputs; 25W
Data Sheet
November 2001
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
Input Voltage:
Continuous
Transient (2ms)
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
I/O Isolation Voltage
Symbol
V
I
V
I, trans
T
A
T
stg
—
Min
—
—
–40
–55
—
Max
80
100
100
105
1500
Unit
Vdc
V
°C
°C
Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply 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
; see Figures 1
and 2.)
Inrush Transient
Input Reflected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 µH source impedance;
see Figure 15)
Input Ripple Rejection (120 Hz)
EMC, EN55022
(V
I
,
nom
, full load)
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This 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 fuse with a maximum rating of 3 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.
Symbol
V
I
I
I, max
Min
36
—
Typ
48
—
Max
75
1.1
Unit
Vdc
A
—
I
I
—
—
—
4
1.0
—
A
2
s
mAp-p
—
—
54
—
See EMC Considerations section.
dB
2
Tyco Electronics Corp.
Data Sheet
November 2001
HW025 Dual Positive Output-Series Power Modules: dc-dc Converters:
36 Vdc to 75 Vdc Input, Dual Positive Outputs; 25W
Electrical Specifications
(continued)
Table 2. Output Specifications
Parameter
Output Voltage Set Point
(V
I
= 48 V; I
O1
= I
O2 =
2.5 A
; T
A
= 25 °C)
Device
HW025AF
HW025FG
Output Voltage
(Over all operating input voltage, resistive
load, and temperature conditions until end
of life.)
Output Regulation:
Line (V
I
= 36 V to 75 V)
Load (I
O
= I
O, min
to I
O, max
)
Temperature (T
A
= –40 °C to + 70 °C)
Output Ripple and Noise Voltage (see
Figures 9 and 16):
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth)
External Load Capacitance
Output Current
NOTE: The maximum combined output
current must not exceed 5A.
Output Current-limit Inception
(V
O
= 90% of V
O, nom
)
Output Short-circuit Current
(V
O
= 250 mV)
Efficiency
for V
01
= 5.0 V, V
02
= 3.3 V
(V
I
= 48 V, I
01
= I
02
= 2.5 A, T
ref
= 25 °C)
for V
01
= 3.3 V, V
02
= 2.5 V
(V
I
= 48 V, I
01
= I
02
= 2.5 A, T
ref
= 25 °C)
Switching Frequency
HW025AF
HW025FG
Symbol
V
O1, set
V
O2, set
V
O1, set
V
O2, set
V
O1
V
O2
V
O1
V
O2
—
—
—
Min
4.92
3.25
3.25
2.46
4.78
3.16
3.16
2.39
—
—
—
Typ
5.00
3.30
3.30
2.50
—
—
—
—
0.01
0.05
0.60
Max
5.08
3.35
3.35
2.54
5.21
3.44
3.44
2.61
0.2
0.2
2.0
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
%V
O
%V
O
%V
O
All
All
All
All
All
All
All
All
All
HW025AF
HW025FG
All
HW025AF
HW025FG
All
—
—
C
VO1, max
C
VO2, max
I
O1
I
O2
I
O, TOT
I
O, cli
I
O, cli
I
O, SL
η
η
—
—
—
0
0
0.0
0.0
0.0
—
—
—
82
80
—
—
70
—
—
—
—
—
—
—
1.0
85
83
300
30
100
100*
100*
4.0
4.0
5.0
9
†
9
†
—
—
—
—
mVrms
mVp-p
µF
µF
Adc
Adc
Adc
A
A
Adc
%
%
kHz
* It is recommended that the output capacitance’s are balanced, where possible. Consult your sales representative or the factory for higher
capacitance.
† These are manufacturing test limits. In some situations, results may differ.
Tyco Electronics Corp.
3
HW025 Dual Positive Output-Series Power Modules: dc-dc Converters:
36 Vdc to 75 Vdc Input, Dual Positive Outputs; 25W
Data Sheet
November 2001
Electrical Specifications
(continued)
Table 2. Output Specifications
(continued)
Parameter
Dynamic Response
(
∆
I
O
/
∆
t = 1 A/10 µs, V
I
= 48 V, T
ref
= 25 °C):
Load Change from IO1 = 50% to 75% of
I
O1
, max or I
O1
= 50% to 25% of IO1,
max; I
O2
= 30% of I
O2
, max:
Peak Deviation
Settling Time (V
O
< 10% of peak
deviation)
Load Change from IO2 = 50% to 75% of
I
O2
, max or I
O2
= 50% to 25% of I
O2
, max;
I
O1
= 30% of I
O1
, max:
Peak Deviation
Settling Time (V
O
< 10% of peak
deviation)
Device
Symbol
Min
Typ
Max
Unit
All
All
—
—
—
—
100
2000
—
—
mV
µs
All
All
—
—
—
—
100
2000
—
—
mV
µs
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Min
—
10
Typ
0.2
—
Max
—
—
Unit
nF
M
Ω
General Specifications
Parameter
Calculated MTBF (I
O
= 80% of I
O, max
; T
A
= 20 °C)
HW025AF
HW025FG
Weight
Min
Typ
4,000,000
4,900,000
—
Max
Unit
hours
hours
g (oz.)
—
23 (0.81)
Solder Ball and Cleanliness Requirements
The open frame (no case or potting) power module will meet the solder ball requirements per J-STD-001B. These
requirements state that solder balls must neither be loose nor violate the power module minimum electrical spacing.
The cleanliness designator of the open frame power module is C00 (per J specification).
Solder, Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result
of inadequate circuit-board cleaning and drying can affect both the reliability of a power module and the testability
of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning, and drying procedures,
refer to the
Board-Mounted Power Modules Soldering and Cleaning
Application Note
(AP97-021EPS).
4
Tyco Electronics Corp.
Data Sheet
November 2001
HW025 Dual Positive Output-Series Power Modules: dc-dc Converters:
36 Vdc to 75 Vdc Input, Dual Positive Outputs; 25W
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Table 3. Feature Specifications
Parameter
Remote On/Off Signal Interface*
(V
I
= 0 V to 75 V; open collector or equivalent
compatible; signal referenced to V
I
(–)
terminal; see Figure 18. and Feature
Descriptions.):
HW025 Preferred Negative Logic:
Logic Low—Module On
Logic High—Module Off
HW025 Optional Positive Logic:
Logic Low—Module Off
Logic High—Module On
Logic Low:
At I
on/off
= 1.0 mA
At V
on/off
= 0.0 V
Logic High:
At I
on/off
= 0.0 µA
Leakage Current
Turn-on Time (I
O1
& I
O2
= 2.5A; V
O1
and V
O2
within ±1% of steady state;
see Figure 7/14.)
Output Voltage Adjustment Range (trim), each
output:
Note:
There are restrictions to the
combinations of output voltage.
See Output Voltage Adjustment Section.
Output Overvoltage Protection
(Note: Only on V
O1
)
Overtemperature Protection
* A Minimum OFF Period of 1 sec is recommended.
Device
Symbol
Min
Typ
Max
Unit
—
—
—
—
—
V
on/off
I
on/off
V
on/off
I
on/off
—
0
—
—
—
—
—
—
—
—
15
1.2
1.0
15
50
—
V
mA
V
µA
ms
HW025AF
V
01
V
02
V
01
V
02
V
01
V
01
T
ref
76
76
60
5.6
3.5
—
—
—
—
—
—
—
120
105
105
105
105
7.0
4.0
—
%V
%V
%V
%V
V
V
°C
HW025FG
HW025AF
HW025FG
All
Tyco Electronics Corp.
5
