TPS25947: looking for a power mux solution

Stefan Lintner

Expert 5105 points

Part Number: TPS25947

Hi Team,

customer is looking for a power Mux solution for below specs.

- Must select power from multiple sources (prioritized)
  - USB-C input 1
  - USB-C input 2
  - External battery
  - Internal battery
- Integrated button controller
- Voltage 5....10V
- Current 3...5A (internal battery charging)

our power mux solutions do not support those currents.

Would an efuse solution work here?
How would this be implemented?

BR,
Stefan

over 1 year ago

0 Arush Gupta over 1 year ago

TI__Mastermind 38335 points

Hi Stefan,

I will look into this and come back to you.

Meanwhile this app note provides you with a good example on how to implement efuse solution (on page 5). Basics of Power MUX (Rev. A) (ti.com)

Best Regards,

Arush

+1 Arush Gupta over 1 year ago

TI__Mastermind 38335 points

Hi Stefan,

In 259470x, you can use AUXOFF pin and OVLO pin to implement a priority power mux. You will need some OR gates for control logic (as shown in sketch).

Please reply here if you any questions.

Best Regards,

Arush

0 Arush Gupta over 1 year ago

TI__Mastermind 38335 points

Hi Stefan,

Does this answer your question? I will close the thread if you don't have any other questions.

Best Regards,

Arush

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TPS25947: looking for a power mux solution