TPS53622: actual frequency lower than setting

Miranda Gu

Part Number: TPS53622

Hi team,

My customers measured the SW waveform of TPS53622, didn't connect CPU load.

They found the actual SW frequency is only 556kHz, lower than the setting value 800kHz. They also measured other rails, the frequency was setting value ~800kHz.

What's the problem with this rail? What cause the frequency gap? Appreciate your comments!

over 3 years ago

0 Derrick Su over 3 years ago

TI__Intellectual 2845 points

Hi Miranda,

Please check the config. code if the setting is 800KHz. And if customer use voltage divider on feedback network or if the connection of feedback network is correct. Otherwise, please give me more information/condition, then it's really hard to find the reason depend on a waveform.

0 Miranda Gu over 3 years ago in reply to Derrick Su

TI__Genius 15317 points

Hi Derrick,

I will send you their schematics offline.

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TPS53622: actual frequency lower than setting