TPS53819A: The new design

Zhang Liang

Part Number: TPS53819A
Other Parts Discussed in Thread: LM5171, TPS40077, TPS40057

Tool/software:

Hi,

We need the buck DC/DC, and input is 24V, output is 12V/40A, please advise if the TPS53819A is available or not? thanks.

7 months ago

0 Peter James Miller 7 months ago

TI__Guru 56985 points

Zhang Liang

https://www.ti.com/product/TPS53819A

It is listed as active and orderable. You'll need to log in to view inventory

https://www.ti.com/product/TPS53819A#order-quality

0 Zhang Liang 7 months ago in reply to Peter James Miller

Genius 4205 points

Hi Peter,

Sorry, I mean if the TPS53819A can suppor the parameter of input voltage 24V, output is 12V/40A, if not, please advise if there are any other promote? thanks.

0 Peter James Miller 7 months ago in reply to Zhang Liang

TI__Guru 56985 points

Zhang Liang

My apologies for misunderstanding you question.

No, the TPS53819A does not support a 12V output, it has a maximum rated output voltage of 5.5V. This is due to the maximum voltage rating on the VO pin of 6V, and the internal compensation ramp's linear operating range.

For a 20V - 26V input, 12V Output @ 40A, the only non-isolated solution I see using the WeBench Power Designer tool is the LM5171

https://webench.ti.com/power-designer/switching-regulator/select

https://www.ti.com/product/LM5171

It may also be possible to design a TPS40057 or TPS40077 controller to operate at 40A output current, but the integrated drivers were not indented to drive MOSFETs for a 40A power stage.

https://www.ti.com/product/TPS40057

https://www.ti.com/product/TPS40077

Interface

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TPS53819A: The new design