TPS62877-Q1: whether TPS62877-Q1 can support 30A continuous output at Full temperature(-40~125°c)?

Daoyan Zhao

Expert 3535 points

Part Number: TPS62877-Q1

Hi Expert,

May I ask whether TPS62877-Q1 can support 30A continuous output at Full temperature(-40~125°c)?

Because from below Lowside FET parameter, the current is only 29.5A. Thanks a lot!

Best regards,

dayoan

over 1 year ago

0 Excel Regidor over 1 year ago

TI__Mastermind 36681 points

Hello Dayoan,

Thanks for reaching out to us.

I will respond to your queries before the end of the day.

Best regards,

Excel

0 Daoyan Zhao over 1 year ago in reply to Excel Regidor

TI__Expert 3535 points

Hello Excel,

May I ask any updates? Thanks a lot!

Best regards,

Daoyan

+1 Excel Regidor over 1 year ago in reply to Daoyan Zhao

TI__Mastermind 36681 points

Hi Daoyan,

The low-side FET forward switch current limit parameter indicated in the table above is only applicable when the high-side FET reached the forward switch current limit first. When it happens, it turns off the high-side FET immediately and turns on the low-side FET after some delay. As the inductor current is ramping down, the low-side FET turns off once it reach the current threshold to prevent inductor saturation. Please refer to sec. 8.3.14 of the datasheet for the detailed description or in the figure below.

So, TPS62877-Q1 can support 30A of load current depending on the mission profile of the application.

Best regards,

Excel

0 Daoyan Zhao over 1 year ago in reply to Excel Regidor

TI__Expert 3535 points

Hi Excel,

Thanks for the explain. May I add another ensurement?

According to TPS62877 datasheet 8.3.14 over current protection, may I understand like this: "Only when the HS-FET exceeds the Limitation, over current protection will be triggered. If HS-FET does not exceed the limit, only the low side exceeds its limit, the OC protection will not be triggered, right?

Best regards,

Daoyan

0 Daoyan Zhao over 1 year ago in reply to Daoyan Zhao

TI__Expert 3535 points

Hello Excel,

May I know if any feedback? Thanks!

+1 Tanvee over 1 year ago in reply to Daoyan Zhao

TI__Genius 17301 points

Hi Daoyan,

As discussion on going offline. Let me know if you have further questions.

Thanks,

Tanvee

0 Excel Regidor over 1 year ago in reply to Tanvee

TI__Mastermind 36681 points

Hi Daoyan,

Can we close this thread? Or have additional queries?

Best regards,

Excel

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TPS62877-Q1: whether TPS62877-Q1 can support 30A continuous output at Full temperature(-40~125°c)?