TPS25810: the output current is small.

Moon Wang

Part Number: TPS25810

Tool/software:

Hi expect,

My customer wants to do the charger with 5V2A in DFP mode. Below is the sch, which support 5V3A that is same as the sch in datasheet:

Now they tested the output current is only 1A. The charged device is normal when they change to other charger and the charge current is around 2A.

in addition, to avoid the influence of T1, they shorted it but having same result 1A.

The output voltage waveform is as below:

Do you have any idea to check the issue？

BR,

Moon

5 months ago

0 Tommy Lin 5 months ago

TI__Mastermind 31400 points

Hi,

One of our team member will respond to this shortly.

Regards

+1 Chuck Branch 5 months ago in reply to Tommy Lin

TI__Mastermind 32501 points

Moon,

The current limit will depend on the RD that is presented by the type C cable. if the RD is 22K, then the target current is 1.5A, so the limit will be close to 2A. If the RD is 5.1K, then the target current is 3A and the current limit will be close to 3.8A.

Without knowing the voltage on CC1 or CC2, then we cannot tell what the current limit will be.

Can you provide the voltage on CC1/CC2?

Regards,

Chuck

0 Moon Wang 5 months ago in reply to Chuck Branch

TI__Intellectual 1285 points

thanks for reply. The issue is solved after re-wielding the component.

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TPS25810: the output current is small.