TPS62932: Frequency setting

Taku Murayama

Part Number: TPS62932

① the switching frequency when I exit PFM mode is different from the set frequency.
When the load is low even after exiting the PFM mode, does the set frequency sometimes not reach?

② the frequency setting is set to 2.2MHz, but the setting may be 2.2MHz or higher due to the variation of the resistor.
Is there any problem as a DCDC even if it is set at 2.2MHz or higher?

over 1 year ago

0 Aurora Tie over 1 year ago

TI__Genius 16760 points

Hi,

It's the weekend now. My colleague Bella will reply to you next Monday. Thank you for your patience.

Aurora

0 Shuhei Goto over 1 year ago in reply to Aurora Tie

TI__Expert 4850 points

Hi Aurora,

Thank you for reply.
If you have any update, please provide us.

Best regards,
Goto

0 Aurora Tie over 1 year ago in reply to Shuhei Goto

TI__Genius 16760 points

Hi Goto,

Bella is on vacation today, so I will reply. For you questions:

1. PFM mode will reduce the frequency, this is normal. When the inductor current continues, the frequency will become the set value. This mode improves light load efficiency.

2. Our device takes the resistance error into consideration when designing, so a frequency higher than 2.2MHz is acceptable. There is no problem.

Aurora

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TPS62932: Frequency setting