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参数资料
| 型号： | LH1783-2RD4 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-32/11 |
| 文件页数： | 15/21页 |
| 文件大小： | 984K |
| 代理商： | LH1783-2RD4 |
H Series Data Sheet
70 Watt AC-DC Converters
BCD20019 Rev AA
Page 3 of 21
www.power-one.com
Part Number Description
L H 1 5 01 -2 R D3
Operating input range Vi:
85 – 255 VAC, 47 – 63 Hz ................... L
Series ................................................................................... H
Number of outputs ........................................................ 1, 2, 3
Output 1, Vo1 nom:
5.1 V ............ 0, 1, 2
12 V .................... 3
15 V ................ 4, 5
24 V .................... 6
other voltages ................ 7, 8
48 V .................... 9
Single-output models (different specs.) ..............01 – 99
Outputs 2, 3: Vo2 nom, Vo3 nom:
5.1 V ....................................................................01 – 19
12 V ..................................................................... 20 – 39
15 V ..................................................................... 40 – 59
24 V ..................................................................... 60 – 69
other voltages for multiple-output models ........... 70 – 99
Ambient temperature range TA:
–10 to 50 °C .................. -2
customer-specific .................. -0
Auxiliary functions and options:
Output voltage control input (single-output models) .... R
Save data signal (D1 – D8, to be specified) ................ D 1
ACFAIL signal (V2, V3, to be specified) ....................... V 1
1 Option D excludes option V and vice versa
Example:
LH1501-2D3: AC-DC converter,operating input voltage range 85 – 255 VAC, providing one output with 15 V /
4.5 A, equipped with an output voltage adjust input (R), and undervoltage monitor D3.
Functional Description
The input voltage is fed via an input fuse, an input filter, and an
inrush current limiter 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 and an output capacitor.
The main control circuit 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 transferred to the primary side by a coupling
transformer.
The auxiliary output voltages Vo2 and Vo3 are tracking. Each
auxiliary output's current is sensed 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 main control
circuit.
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