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TPS61050: LED flashes

Part Number: TPS61050

Hi

Customers use TPS61050 to control Flash LED in PC CAMERA, the circuit is as follows.

LED_VCC supply voltage is 5V SDA, SCL, Flash_SYNC signal voltage is 1.8V When the power is found to be off, the LED will flash once.

When the LED_VCC voltage is reduced to 3.3V. Power is off, the LED will not flash.

When the current application to customers LED_VCC supply voltage of 5V. What are ways to avoid the power Power off, LED will not flash it?