TPS55330: Please tell me the recommend parts number.

user1182952

Prodigy 100 points

Part Number: TPS55330
Other Parts Discussed in Thread: BQ24072, , TPS61178

Hello,
Followings are my In/Out design spec.
Vin=2.7V to 4.2V( this is the Li ion battery spec)
Vout=20V
Iout=2A

In this case, I want to know the parts number of "D1" and "L1".
Or, please tell me the recommended spec of these parts.

Best Regards

over 8 years ago

0 Youhao Xi over 8 years ago

TI__Guru* 78380 points

Do you mean 2.7V in to start up or during operation the voltage can drop down to 2.7V but at start up the Vin is 3V or higher?

0 user1182952 over 8 years ago in reply to Youhao Xi

Prodigy 100 points

Hi, Youhao Xi

When startup then Vin is upper 3.0V.
Followings are this projects Brock diagram.

USB
|
V
Li-ion battery <--> BQ24072(>3.3V) --> TPS55330 --> 20V:1A load
(load: 2A is wrong, 1A is true)

I want to know the "D1" and "L1" spec or parts number.
And also I want to know Can I achive this projects?

best regards

0 Youhao Xi over 8 years ago in reply to user1182952

TI__Guru* 78380 points

I am afraid the TPS55330 cannot support your 20V@1A load. It is 20W and the input current could be >7A @3.0Vin, exceeding the current limit of the IC. The TPS61178 seems having a better chance to support your load.

0 user1182952 over 8 years ago in reply to Youhao Xi

Prodigy 100 points

Hello. Mr.Youhao Xi

Thank you for your support.
Maybe I was incorrectly choose that product TSP55330.
I'll try to re-select and re-design TPS61178 instead of TPS55330.

Thanks
best regards

Power management

Power management forum

TPS55330: Please tell me the recommend parts number.