TPS55160-Q1: Higher input voltage capability

Klaus Moelholm

Part Number: TPS55160-Q1
Other Parts Discussed in Thread: LM5176, LM5001, TPS55340

I consider using a LM5176 with an input voltage down to 3.6V and it will therefore need a 9V bias voltage. For this task TPS55160-Q1 was suggested but the issue with this part is that the max input voltage is 36V and the abs. max. is 40V.

But in my application we have the following specifications:

Nominal Input voltage: 3.6 to 36V

Input overvoltage TVS protection = TPSMA6L36A: VbrMax = 44.2V @ It = 1mA

Output voltage: 9V

Output current: 4mA

Ambient temperature: The board will be mounted inside a box with no air flow and the temperature inside the box is estimated to be up to about 83C and down do -40C.

The building height should be kept below 4mm where possible, and the absolute max building height is 8 mm.

If You have any suggestion for a similar part that can handle higher voltages, it would be a big help.

Best regards

Klaus

over 4 years ago

0 Helen chen over 4 years ago

TI__Mastermind 40080 points

Dear Sir,

The closest part is TPS55160-Q1, but you need to clamp the maximum input at 36V . Ensure it will never exceed this value. LM5176 is OK, but it is a little bit over design.

You can also use LM5001 in Sepic topology.

0 Klaus Moelholm over 4 years ago in reply to Helen chen

Prodigy 170 points

Dear Helen,

I agree that a LM5176 design would be to big. LM5001 looks more tempting but when I try to enter my requirements in WEBENCH I get different error messages when Try to update my design.

Best regards

Klaus

0 Helen chen over 4 years ago in reply to Klaus Moelholm

TI__Mastermind 40080 points

Dear Sir,

Webench only support Boost. For the sepic, you need to simulate it with TI-tina or pspice. You can refer to the TPS55340 EVM circuit for a referecne. 0827.slvu742a-SEPIC.pdf

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TPS55160-Q1: Higher input voltage capability