TPS2373: TPS2373-4 VC_OUT function

Zhizhao Niu

Part Number: TPS2373

Hi team,

Our customer is using TPS2373-4. Could you please comment on If we don’t need to use VC_OUT function, can we leave VC_IN and VC_OUT open or connect to RTN? Thank you very much!

B.R.

Lucas

over 5 years ago

0 Michael Pahl over 5 years ago

TI__Mastermind 21320 points

Hello Lucas,

The datasheet explains, " If VC_OUT is not used, VC_IN must be connected to the low voltage bias supply of the PWM controller to ensure proper operation."

VC_IN is the input power rail for the IC.

If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

Regards,

Michael P.

Applications Engineer

Texas Instruments

0 Zhizhao Niu over 5 years ago in reply to Michael Pahl

TI__Expert 4420 points

Hi Michael,

Thank you for your reply and a further question is that when we don't use VC_OUT, VC_IN need to connect to the PWM controller VCC how about VC_OUT? Do we need to place a cap between VC_IN and RTN or I can left it open? Thanks!

B.R.

Lucas

0 Michael Pahl over 5 years ago in reply to Zhizhao Niu

TI__Mastermind 21320 points

Yes VC_IN needs a cap.

If you are connecting VC_In to a DCDC controller, why not use VC_OUT instead? That eliminates the advanced startup feature entirely.

If VC_OUT is not used leave it unconnected.