Application recommendation of 6S1P battery input to 24Vout@1A DC/DC

Junghwa Ha

Prodigy 245 points

Other Parts Discussed in Thread: TPS55340, LM5176, LM5118, LM34936

Hello,

I want to get a recommendation of DC/DC application as below:

Vin = VBAT from 6S1P battery input

Vout = 24V with 1A max.

I can find several candidate. But I want to get cost effective and proper to our application.

over 6 years ago

0 Helen chen over 6 years ago

TI__Mastermind 40080 points

Dear Sir,
What is your maximum Vin?

0 Junghwa Ha over 6 years ago in reply to Helen chen

Prodigy 245 points

Hello,

Vmax is 30V.

Junghwa

0 Helen chen over 6 years ago in reply to Junghwa Ha

TI__Mastermind 40080 points

You can use TPS55340 sepic converter. Please take a look at slvu742a.

0 Junghwa Ha over 6 years ago in reply to Helen chen

Prodigy 245 points

Hello,

Thank you for your recommendation.

But when I search component with WEBENCH DESIGN CENTER, it didn't recommend TPS55340.

Search condition

Input DC 5V-30V

Output 24V at 1A

Temp 30C

Result shows such as LM25188/LM5118/LM34936/LM5176.

And when I see EVM document, it just accepts 6V to 18V of VIN.

When I tried to follow detailed design procedure from DS, webench interactive preview doesn't show solution with this requirement.

https://webench.ti.com/wb5/WBTablet/PartDesigner/quickview.jsp?base_pn=TPS55340&origin=ODS&litsection=application

I want to know what is difference in circuit when VIN is changed from 6-18V to 20-26V

Actually VIN is planned to use 6S1P battery voltage.

VBAT will varies 20V to 26.1V

Can I use TPS55340 EVM kit to test our application?

During review of TPS55340 EVM, I found a question and answer related to VIN voltage and IOUT.

http://www.ti.com/tool/TPS55340EVM-017

https://e2e.ti.com/support/power-management/f/196/p/796838/2947865#2947865?jktype=e2e

Junghwa

0 Helen chen over 6 years ago in reply to Junghwa Ha

TI__Mastermind 40080 points

Dear Sir,
TPS55340 supports 32Vin, and the Webench only shows boost solution. It doesn' t show Speic solution. That's why u can't find it.

0 Junghwa Ha over 6 years ago in reply to Helen chen

Prodigy 245 points

Hello,
I see. Then I can use TPS55340 to my application.
Can I know how to test SEPIC EVM kit with 20-26.1V input to 24V output?
According to slvu742a user guide, EVM has 6V to 18V input voltage range.
I can't find any value change information as to different voltage input range from DS, either.
Before applying TPS55340 to my application, I want to check the basic performance of the component using EVM kit.