TPS54239: Why maximum output range only 7 volts?

NObody

Expert 1100 points

Part Number: TPS54239
Other Parts Discussed in Thread: TPS54336A

Sorry to bother.

Customer want to know that why TPS54239 maximum output only 7 volts?

The other similar item -- TPS54336A's maximum output can reach 25 volts.

What is cause of this difference?

Another question, where can find the lower switch current limit of TPS54239? (like attachment picture)

We can't find it form datasheet.

0 Jason Wang (BSR-MV) over 6 years ago

hi,
TPS54239 is belongs to DCAP2 mode and TPS54336A is belongs to peak current mode.
So there is Vout max limitation for TPS54239.

0 NObody over 6 years ago in reply to Jason Wang (BSR-MV)

Expert 1100 points

Hi, Jason：

Thanks for your reply soon.

More one question.

As the attachment picture.

why sink current limit is zero?

this is because only one way of current loop when low side FET on, right?

0 Jason Wang (BSR-MV) over 6 years ago in reply to NObody

yes, correct!

0 NObody over 6 years ago in reply to Jason Wang (BSR-MV)

Expert 1100 points

ok, thanks

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