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TPS25910 and TPS25942 /about internal FET

Tsukui Yusuke
Guru 21930 points
Other Parts Discussed in Thread: TPS25910

Hi,

Could you tell me about TPS25910 and TPS25942 internal FET.
Please tell me the power dissipation of this FET.
Customer wants to use e-fuse of the many power dissipation FET .

Best Regards,
Yusuke/Japan Disty


 

 

  • 0
    TI__Intellectual 2980 points

    Hello 

    The FET power dissipation will depend on the output load  current  . Actually The TPS25910 device operates in power-limit mode during an overload condition and increases the voltage drop across power switch. It self protects by using a thermal sensing circuit that monitors the operating temperature of the power switch and disables operation if the temperature exceeds the thermal shutdown condition (160°C typical).  The thermal sensor turns off the power switch when the die temperature exceeds 160°C. Hysteresis is built into the thermal sensor, and the switch turns on after the device has cooled approximately 20°C.

    The TPS25942 has slightly different operation,

    Please refer to section ...10.3.4.1 Overload Protection & 10.3.4.2 Short Circuit Protection for the detailed information  also Figure 30. Thermal Shutdown Time vs Power Dissipation" in the TPS25942 data sheet for the power dissipation and the time it takes to shut down.

     Please let me know if you have further question

     Best Regards

    Dinesh