參數(shù)資料
型號: DW025AB-8
元件分類: 電源模塊
英文描述: 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE
文件頁數(shù): 2/20頁
文件大?。?/td> 1627K
代理商: DW025AB-8
10
Tyco Electronics Corp.
Data Sheet
June 1997
36 Vdc to 75 Vdc Input; Dual Outputs; 25 W
DW025 Dual Output-Series Power Modules: dc-dc Converters;
Test Congurations (continued)
8-808(C)
A. Pinout A (DW025AJ-M, BK-M, CL-M) Congura-
tion
8-809(C)
B. Pinout B (DW025AA-M, AB-M, AF-M, BB-M,
CC-M) Conguration
Note: Use a 0.1 F 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
8-753(C)
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.
Figure 13. Output Voltage and Efciency Measure-
ment Test Setup
Design Considerations
Input Source Impedance
The power module should be connected to a low ac-
impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. A 33 F electrolytic capacitor (ESR < 0.7
at
100 kHz) mounted close to the power module helps
ensure stability of the unit.
VO1(+)
VO2(–)
SCOPE
0.1 F
COPPER STRIP
0.1 F
SCOPE
COMM
RLOAD1
RLOAD2
VO1(+)
VO2(–)
SCOPE
0.1 F
COPPER STRIP
0.1 F
SCOPE
RLOAD1
RLOAD2
VO1(–)
VO2(+)
VI(+)
I I
I O
SUPPLY
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD
VI(–)
VO1
VO2
COM
LOAD
η
VOJ
COM
[]IOJ
J1
=
2
VI +
() VI
()
[]II
-------------------------------------------------- x 100
=
Pinout A
η
VOJ +
()
VOJ
()
[]IOJ
J1
=
2
VI +
() VI
()
[]II
--------------------------------------------------------------x 100
=
Pinout B
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