TPS2051B reverse current

Mac Chen

Other Parts Discussed in Thread: TPS2051B, TPS2051

Hi Sir,

I did the design with the TPS2051B as the following sch.

TPS2051 will connect the DP cable to the TV or the displace devices. This cable could be the active cable or the passive cable.

so if the circuit is operating, and the DP cable is always connected, everything is good.

But when we remove the DC5V power, we found the reverse current is from TV by the active cable to TPS2051.

and TPS2051 did not block it.

Did I get someting wrong, or how could we fix it ?

BR,

Mac.

over 9 years ago

0 Aleksandras_Kaknevicius over 9 years ago

TI__Genius 15780 points

Hi Mac,

This part falls under the Power Interface forum. I will go ahead and move this post.

Thanks,

Alek Kaknevicius

0 Eric Wright over 9 years ago in reply to Aleksandras_Kaknevicius

TI__Mastermind 42795 points

TPS2051B will block reverse current when the EN pin is de-asserted. If the EN pin is asserted and VIN > UVLO then TPS2051B VIN is connected to VOUT just like a switch.

Power management

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TPS2051B reverse current