TPS92691: TPS92691 input and output with same frequency and duty cycle

Star Xu

Genius 9645 points

Part Number: TPS92691

Please help check the attached schematic.

The phenomenon is Pin4 input PWM single and PIN15，PIN11 output the same frequency and duty cycle.

We can use MCU PWM single dimming the LED with max 60W.

test condition is DC：5.4V-8.1V，load：two series 12V LED.

Waiting for your reply

Thanks

Star

over 6 years ago

0 Clinton Jensen over 6 years ago

TI__Mastermind 25500 points

Hello Star,

I don't see any issues with the schematic, but I am not sure the exact issue you are having.

Are you saying GATE is just turning on and off with PWM but not switching when PWM is high? Can you get waveforms of what you are seeing? Is the device not regulating with PWM high? Thanks.

Regards,

Clint

0 Clinton Jensen over 6 years ago

TI__Mastermind 25500 points

Hello Star,

Has this issue been resolved so I can close this thread? Please let me know.

Thanks,

Clint

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TPS92691: TPS92691 input and output with same frequency and duty cycle