TPS61165: PWM Control

Khoi Nguyen83

Part Number: TPS61165

I try to send PWM 50% and 25% duty cycle, 5KHz to 100KHz into control pin but it would turn off the LED instead of dimming it.

Am I missing something?

over 7 years ago

0 Caryss Li over 7 years ago

TI__Expert 4550 points

HI Khoi,
Could you please give us more information? what is the test sequence you use, better from start up.

0 Khoi Nguyen83 over 7 years ago in reply to Caryss Li

Expert 1180 points

It is powered up with CTRL pin pulled high. Then we drive 5KHZ 50% signal. I'm not using 1-wire interface.

I just want to make sure I have the right sequence so I don't miss anything. Then we can debug issue with customer LCD we are using.

0 Caryss Li over 7 years ago in reply to Khoi Nguyen83

TI__Expert 4550 points

5kHz is quite close to 1-wire interface detection timing scheme. Is it possible to increase the PWM frequency?

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TPS61165: PWM Control