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TPS62742: tps62742 ESD issue

Part Number: TPS62742
Other Parts Discussed in Thread: BQ24091

Dear team,

Customer find tps62742 seems latch-up when going on ESD test. Please refer to attached schematic.

Issue description:

When customer begin ESD test (8Kv) on Vbus or GND of bq24091, the output voltage of TPS62742 changed to 0.5V, output current several hundred mA. We doubt if it is because the low-side MOSFET short to GND. As customer has added ESD diode, TPS62742 turn to normal when enable again.  

If cut off the load of TPS62742, only input connect with battery, the phenomenon still exist.

If ESD test under 2Kv, no abnormal phenomenon.

Would you kindly give some suggestion?



  • Hello,

    it is important to understand which standard was used for this esd test (8kV). This test was done system level but in our d/s is specified device level with the relative standards and values. Please refer to our documentation, I attached here the related part of the d/s.