TPS62230: The reason to change the SW-freq by output load current.

Motoyasu Hattori

Part Number: TPS62230

Hi,

According to TPS62230 datasheet P.19, Figure23, we understand switching frequency is changed by output load current. Why is changed? Please advise us. As the background, my customer wants to reduce ripple near LDO (10mV). But target frequency is changed due to load. That is why he asks.

Thanks and best regards,
M.HATTORI.

over 4 years ago

0 Varun John over 4 years ago

TI__Mastermind 21560 points

Hi Motoyasu,

TPS62230 has a lower switching frequency at higher loads to overcome the higher resistive drops in the circuit. TPS62230 allows up to 15uF effective output capacitance. If the customer is below this value, he could add some more output caps to lower the ripple.

Best regards,

Varun

0 Varun John over 4 years ago in reply to Varun John

TI__Mastermind 21560 points

Hi Motoyasu,

Do you have any further questions? I am closing this thread. You can reopen it by posting your comment here.

Best regards,

Varun

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TPS62230: The reason to change the SW-freq by output load current.