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TPS25830A-Q1: VBAT Transient protection and IC Recommendation

Egemen Aksoy
Intellectual 735 points
Part Number: TPS25830A-Q1
Other Parts Discussed in Thread: TPS25832A-Q1,

Tool/software:

Hello,

In our project, we consider using the TPS25830A-Q1 or TPS25832A-Q1 ICs to charge a mobile phone from a 12V vehicle battery.

Are these integrated circuits resistant to 40V transients and load dumps?

Could we use one of these ICs directly with a TVS diode (SM8S24A-Q) connected from Vbat to GND without any additional protection circuitry?

Which of the two mentioned ICs would you recommend for this application?

Additionally, could you suggest a more compatible or IC if available?

Best regards,

Egemen Aksoy

  • 0
    TI__Expert 4721 points

    Hi Egemen,

    The maximum absolute voltage for Vin is 40V. The transient response of load change is good for both chips.

    For a simplified circuit, you can just connect the product to battery with limited protection, such as a TVS, The products have integrated protection: TPS25830A-Q1 also integrates short-to-battery protection on VBUS, CC1, CC2, DM_IN and DP_IN pins (up to 18-V support). The TPS25832A-Q1 does not support data line (CC and Dx) short to VBAT protection

    As for which is better, I think it's mainly decided by if you need data line (Dx and CC) short-to VBAT protection.

    83xA-Q1 would be good for automotive 5V/3A charging, if you need PD you can look at TPS25762/TPS25763.

    BR,

    Ke Wang