TPS61162 / PWM dimming frequency

K.Yaita

Guru 29720 points

Other Parts Discussed in Thread: TPS61162

Hi,

I have questions about TPS61162.

In datasheet Page.3, It indicates that recommended Fpwm is "40kHz to 100kHz".

But, Typical Characteristics in Page.6, "PWM Freq=20kHz" is the condition. Isn't this recommended condition?

If the former "40kHz to 100kHz" is correct, Why the customer needs to set the frequency upper 40kHz?

My customer plans to use 31kHz for Fpwm, Is this condition unrecommended?

Regards,

Yaita

over 12 years ago

0 Li Deng over 12 years ago

TI__Prodigy 110 points

Hi Yaita,

The recommended PWM frequency is still "40kHz to 100kHz". We will correct the Typical Characteristics in Page.6. 31kHz PWM frequency is not recommended (may cause some flickering issue), so please guide your customer to increase the PWM freq to higher than 40kHz.

Thanks.

Li Deng

0 K.Yaita over 12 years ago in reply to Li Deng

Guru 29720 points

Hi Li,

OK. I will have a talk to my customer about that.

I appreciate your support.

Regards,

Yaita

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TPS61162 / PWM dimming frequency