TPS61372EVM-033: Setting the Output voltage for AUTO PFM mode.

Miyanaga

Prodigy 190 points

Part Number: TPS61372EVM-033

I understand that like the following.

I'd like to set 7.9V.

In the case of Forced PWM,

Vout = 0.594 * (1 + 1230k/100k) = 7.9V.

By the way,

If I will also use Auto PFM mode, could you please tell me the value of Vref?

Vout = 1.016 * (1 + 1230k/100k) = 13.5V?

Best regards,

Miyanaga

over 6 years ago

0 Minqiu Xie over 6 years ago

TI__Mastermind 21565 points

Hi Miyanaga:

Thanks for reaching out. The 1.016 actually means (1+1.6%) time Vref. Sorry that the table doesn't explain it very clear.

If you set the Auto PFM, and once it enter into PFM, the Vout_set will be 1.6% higher than the typical value in Force PWM. But please notice, set Auto PFM doesn't means the converter must enter into PFM. It depends on the load condition and other factors.

0 Miyanaga over 6 years ago in reply to Minqiu Xie

Prodigy 190 points

Hi, Minqiu san,

Thank you for your reply.

I understand.

Best regards,

Miyanaga

Power management

Power management forum

TPS61372EVM-033: Setting the Output voltage for AUTO PFM mode.