TPS2549-Q1: With LM63635-Q1 Buck converter design review

SHIJU R

Part Number: TPS2549-Q1
Other Parts Discussed in Thread: LM63635-Q1,

In my new design i have a USB port with power delivery for charging 5V @2.4A requirement . So i drafted the circuit by using TPS2549-Q1 and LM63635-Q1 , same is attached here for the review ,Please provide me youir feedbacks if anything wrong is in the schematics circuit. Cable resistance i considered as 420mOhm.

over 2 years ago

0 Bing Hwang over 2 years ago

TI__Intellectual 2370 points

Hi Shiju,

/FAULT and /STATUS are open-drained, R290 can be removed.

And for VBUS capacitance, it should be no less than 120uF as per USB-IF USB 2.0 Specification as below:

Thanks.

Bing

0 SHIJU R over 2 years ago in reply to Bing Hwang

Prodigy 50 points

Thanks for reply bing

Buck LM63635-Q1 output (VBUS) i have currently 2x47uF so i need to change it into min 120uF or in the OUT pin (12) of TPS2549-Q1 i need to connect min of 120uF . please clarify.

Rest of the section are fine like LM63635-Q1 feedback section ?

regards

SHIJU.R

0 Bing Hwang over 2 years ago in reply to SHIJU R

TI__Intellectual 2370 points

Hi Shiju,

The requirement from USB 2.0 Spec is for VBUS, thus the VBUS pin to GND should at least 120uF.

For LM63635-Q1, as per the datasheet, it looks good from my side.

Thanks.

Bing

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Power management forum

TPS2549-Q1: With LM63635-Q1 Buck converter design review