某世界級大廠的led psu，他的保護ic使用的是weltrend wt7510，只有OVD跟UVD

WT7510
DESCRIPTION
The WT7510 provides protection circuits, power good output (PGO), fault protection latch(FPL_N), and a protection detector function(PDON_N) control. It can minimize external components of switching power supply systems in personal computer.
The Over Voltage Detector (OVD) monitors 3.3V, 5V, 12V input voltage
level. The Under Voltage Detector (UVD) monitors 3.3V, 5V input voltage
level:
(1).When OVD or UVD detect the fault voltage level, the PGO is LOW
and FPL_N is latched HIGH. The PDON_N will resets the fault protection
latch from LOW to HIGH. There is a 1.2ms delay from PDON_N to FPL_N.
(2).When OVD and UVD detect the right voltage level, the power good
output(PGO) will be issue.


FEATURES
The Over Voltage Detector (OVD) monitors 3.3V, 5V, 12V input voltage level.
The Under Voltage Detector (OVD) monitors 3.3V, 5V input voltage level.
Both of the power good output (PGO) & fault protection latch(FPL_N) with Open Drain Output Stage.

300ms time delay for PGO.
38ms for PDON_N input signal Debounce.

73us for internal signal De-glitches.
1.2ms time delay for PDON_N turn-off FPL_N.
Package: 8-Pin DIP, 8-Pin SOIC
　
這是WT7510這顆保護IC的資料，看的懂英文的應該知道我在說什麼，別說太明以免他們又來恐嚇我