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參數(shù)資料
| 型號： | FW150F9 |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 99 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 1150K |
| 代理商： | FW150F9 |
Tyco Electronics Corp.
7
Data Sheet
September 1997
dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W
FW150F Power Module:
Test Congurations
8-203 (C).l
Note: Measure input reected-ripple current with a simulated source
inductance (LTEST) of 12 H. Capacitor CS offsets possible bat-
tery impedance. Measure current as shown above.
Figure 8. Input Reected-Ripple Test Setup
8-683 (C).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.
Figure 9. Output Voltage and Efciency
Measurement Test Setup
8-513 (C)
Note: Use a 0.1 F ceramic capacitor. Scope measurement should
be made using a BNC socket. Position the load between
50 mm (2 in.) and 80 mm (3 in.) from the module.
Figure 10. Peak-to-Peak Output Noise
Measurement 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. For the test conguration in Figure 8, a 33 F
electrolytic capacitor (ESR < 0.7
at 100 kHz)
mounted close to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, consult the factory for further application
guidelines.
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:
s
All inputs are SELV and oating, with the output also
oating.
s
All inputs are SELV and grounded, with the output
also grounded.
s
Any non-SELV input must be provided with rein-
forced insulation from any other hazardous voltages,
including the ac mains, and must have a SELV reli-
ability test performed on it in combination with the
converters. Inputs must meet SELV requirements.
If the input meets extra-low voltage (ELV) require-
ments, then the converter’s output is considered ELV.
The input to these units is to be provided with a maxi-
mum 20 A normal-blow fuse in the ungrounded lead.
Electrical Descriptions
Current Limit
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and can endure current limiting for an unlim-
ited 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 specied range.
TO OSCILLOSCOPE
12 H
VI(+)
VI(–)
CURRENT
PROBE
LTEST
BATTERY
CS 220 F
ESR < 0.1
@ 20
°C, 100 kHz
33 F
ESR < 0.7
@ 100 kHz
VI(–)
VO(+)
PARALLEL
SENSE(+)
SENSE(–)
VO(–)
VI(+)
IO
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY
II
CONTACT
RESISTANCE
η
VO +
() – VO –
()
[]IO
VI +
() – VI –
()
[]II
--------------------------------------------------
x 100
=
VO(+)
VO(–)
RESISTIVE
LOAD
SCOPE
0.1 F
COPPER STRIP
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