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HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

Enhanced Short Circuit Protection

When most LEDs are shorted in the application circuit, the current regulation may lose control

resulting in the current increasing to an extremely high level. When the current is more than twice

of the set Ipeak, resulting from externally shorted LEDs, the device will shut down gate driving

operations.

The operation state is shown in the accompanying figure. When the circuit is operating normally,

output voltage is adjusted to meet the current requirement. If the circuit encounters a serious short,

HT7L4091.

Normal

Slight

Short

Serious

Short

Shut Down

CS

Vin

GND

RT

LD