TPS25730: TPS2573

Jacob Bitton

Part Number: TPS25730

Tool/software:

My system is powered only from an USB Type-C port (there is no battery !!!) 5V/3A.

As I need more power I want using the controller TPS25730 that can negotiates with USB PD device to sink up to 20V/5A.

My question is: As I don't have a battery or external power supply where from I generate 3.3V for the input pin 38 VIN_3V3 Supply for core circuitry and I/O?

Regards

over 1 year ago

0 Christopher Lim1 over 1 year ago

TI__Mastermind 37855 points

Hi Jacob,

The TPS25730 can operate in "Dead Battery Mode", where it will take power from the VBUS on the Type-C port. It is not required to have a 3.3-V rail for VIN3V3.

Thanks and Regards,

Chris

0 Jacob Bitton over 1 year ago in reply to Christopher Lim1

Prodigy 70 points

In dead Battery Mode, what happened when VBUS is 20V?

Is the TPS25730D includes an internal buck converter that generate the core voltage from 20V VBUS?

+1 Christopher Lim1 over 1 year ago in reply to Jacob Bitton

TI__Mastermind 37855 points

Hi Jacob,

As seen in the picture above, there is an internal LDO that is generating the core voltage.

Thanks and Regards,

Chris

Power management

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TPS25730: TPS2573