Monday, 7 September 2020

LGP32-12P EAY62769501 OPVP-0137 LCD TV Power board schematic, pin voltages and functions

 Used ICs: IC101: L6599AD; IC202: AZ431LANTR-E1; IC251: AS431AN; IC601: SCY99102BDR2G

AC 100V to AC 240V

Inrush Current: 80A zero-peak max at cold start and any specified line, load, temperature conditions.

Power Output Characteristics


On Condition: In a moment of Power-ON Signal activated, the current of 3.5V output should be limited within 40mA(Max) at LCD TV condition for stability. [Do not turn “Power-ON” Signal on at the load condition of 3.5V output, more than 40mA.]

Total regulation for each output circuit includes the results of input voltage variation, load variation, warm-up drift and temperature change.

The following instruments shall be used for measuring ripple noise.

1. Probe having impedance ratio of 1:1.

2. Oscilloscope having frequency characteristic of 100MHz or more.

Ripple and noise are measured at the end of output cable which are added a 0.1uF ceramic capacitor and 47uF electrolytic capacitor. (Connected parallel)


Burn-in

More than 2 hours at 45(±5), Normal input voltage.

AC on/off must be test 1 time after burn-in.

80% Load of specification.

This Power Supply has  protections.

* Short circuit protection between different output terminals is not considered.

* Trip point for over voltage indicates the operating point when the output voltage slowly increases.

* The conditions of Over Current measurement Multi output(3.5V,12V,24V) is nominal load state except an over current measurement.

Connectors and voltages

Schematic [Circuit diagram]


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