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參數(shù)資料
| 型號： | DW025ACL1-M |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 774K |
| 代理商： | DW025ACL1-M |
Tyco Electronics Corp.
11
Data Sheet
June 1997
36 Vdc to 75 Vdc Input; 25 W
DW025 Triple Output-Series Power Modules:
Test Configurations (continued)
8-811(C).a
Note: Use the specified 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 19. Output Noise Measurement Test Setup
8-749(C).b
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.
Figure 20. Triple Output Voltage and Efficiency
Measurement Test Setup
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source im-
pedances can affect the stability of the power module. A
33 F electrolytic capacitor (ESR < 0.7
at 100 kHz)
mounted close to the power module helps to ensure the
stability of the unit.
Safety Considerations
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, and EN60950.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), one of
the following must be true:
I All inputs are SELV and floating, with the output also
floating.
I All inputs are SELV and grounded, with the output
also grounded.
I Any non-SELV input must be provided with reinforced
insulation from any other hazardous voltages, includ-
ing the ac mains, and must have a SELV reliability
test performed on it in combination with the convert-
ers. Inputs must meet SELV requirements.
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 maxi-
mum 5 A normal-blow fuse in the ungrounded lead.
VO1(+)
SCOPE
0.1 F
COPPER STRIP
0.47 F
R LOAD1
VO3(-)
0.47 F SCOPE
R LOAD2
VO2(+)
SCOPE
COM
R LOAD3
VI(+)
I I
I O1
SUPPLY
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD2
SENSE
VO1(+)
SENSE
COM
VO1(+)
VI(-)
COM
VO2(+)
VO3(-)
LOAD1
LOAD3
I O2
I O3
SENSE
VO3(-)
SENSE
VO2(+)
η
VOj +
() VCOM
–
[]IOj
j1
=
3
∑
VI +
()
VI –
()
–
()
+
[]II
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×
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