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參數(shù)資料
| 型號(hào)： | 12H3040-7D5 |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE H02, MODULE |
| 文件頁(yè)數(shù)： | 13/19頁(yè) |
| 文件大小： | 356K |
| 代理商： | 12H3040-7D5 |
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H Series Data Sheet
50 Watt DC-DC Cassette Converters
REV. MAR 27, 2006
Page 3 of 19
www.power-one.com
Functional Description
The input voltage is fed via an input filter to the input
capacitor. This capacitor sources a single-transistor forward
converter. Each output is powered by a separate secondary
winding of the main transformer. The resultant voltages are
rectified and their ripples smoothed by a power choke. The
control logic senses the main output voltage
Vo1 and
generates, with respect to the maximum admissible output
currents, the control signal for the primary switching
transistor. This signal is fed back via a coupling transformer.
The auxiliary outputs
Vo2 and Vo3 are unregulated. Each
auxiliary output's current is sensed and transferred to the
main control circuit using a current transformer. If one of the
outputs is driven into current limit, the other outputs will
reduce their output voltages as well because all output
currents are controlled by the same control circuit.
Fig. 1
DC-DC converter block diagram
1 Single output modules H1000 (R input)
Input
filter
Current
limitation
output 3
Main control circuit
Current
limitation
output 2
29
11
8
23
5
26
32
17
14
20
Forward
converter
approx.
70
kHz
Y
1
Y
17
14
2
Vi+
Vi–
i
D/V
R
G
CMKT
03067
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