WS3232 datasheet(6/7 Pages) WINSEMI

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WS3232

3232

Cycle-by-Cycle current limiting (OCP), LED open/short

circuit protection, CS resistor short circuit protection, VCC

UVLO,OVP and Clamp, over temperature protection, and

so on.

When the LED is open circuit, it will trigger over-voltage

protection logic and latch, the system stops switching

immediately; When the LED short circuit is detected, the

system works at low frequency(Fop=5Khz), so the power

loss is low. At some catastrophic fault condition, such as

shorted CS resistor or flyback transformer saturation, the

internal fast fault detection circuit will trigger and latch, the

system stops switching immediately.

After the system enters into fault latch condition, the VCC

voltage will fall until it reaches UVLO threshold. Then the

system will re-start again. If the fault condition is removed,

the system will recover to normal operation.

The thermal shutdown circuitry in the WS3232 senses the

die temperature after start up, and the thermal protection

threshold is set to 150℃ with a 25℃ hysteresis. When the

temperature on die of WS3232 rises and reaches the

threshold, the

power MOSFET

will be shut down

immediately

and

maintained

switch

off

until

the

temperature on die falls 25℃ from thermal protection

trigger point.

WS3232 Datasheet(PDF) 6 Page - Shenzhen Winsemi Microelectronics Co., Ltd

WS3232 Datasheet(HTML) 6 Page - Shenzhen Winsemi Microelectronics Co., Ltd

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