TPS548A28: phase short test

Part Number: TPS548A28

Tool/software:

Hello, our client wants to conduct phase short-circuit tests on the power chip. There are two types: short-circuiting the phase before power-on and short-circuiting the phase after power-on. Both require that the VRD power supply not be damaged and can return to normal after the fault is removed. Is this requirement reasonable for the power chip? From the functional block diagram and principle, is there a possibility of the H-fet burning out? Are there any other chip solutions?

  • Hi Xujunfeng, 

    Are you talking about short SW to ground or SW to Vin? Both will result in damage or potential damage. 

    SW to ground will result in significant current will draw from VIN resulting in potential device damage and long-term reliability degradation.

    SW to Vin will result in significant failure currents will be present. The device will be damaged.

    I am not sure if there are other devices that have a SW short protection.

    Best,

    Ryan