This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CSD85302L: I-V Characteristics and Max Current Rating of the Forward Biased Body Diode

Part Number: CSD85302L

Tool/software:

I am looking to disable the battery charging via this switch utilized by my battery protection IC and need to use this switch because the charger attempts to supplement and unintentionally gets charged while the wireless charger system is building up power at the input. 

I plan to disable one FET to prevent current from entering the battery and exit via the body diode if needed. The design is already build, so I don't have the option to create a less lossy alternative. The body diode will only be forward biased for very short periods of time < 100ms at a voltage of around 4.45V, but there may be situations where it needs to conduct around 10mA if the system is power is not correctly power pathed by the PMIC with integrated battery charger.


Can you provide the IV characteristics of the body diode along with the maximum current rating of the forward biased body diode to make sure we are within safe limits and a sufficient operating voltage. 

  • Hello Cameron,

    Thank you for your interest in TI FETs. Please see plot below of body diode VF vs. current. When the body diode is forward biased it will clamp the voltage to a junction drop. The current capability of the body diode is limited by power dissipation. At 10mA, VF of the body diode is around 0.54V and the dissipation will be minimal. Please see application note on body diode current carrying capability. Please let me know if you need any additional information.

    https://www.ti.com/lit/pdf/SNVAA86

    Best Regards,

    John Wallace

    TI FET Applications