TPS562201: Protection circuit

Hi Michiaki,

Yes. TPS562201 has  OCL, UVP and thermal shut down feature.

-       OCL

• Monitor low-side FET drain to source voltage. ---Yes.
• If over current is detected, low-side FET keeps on until less than OCL level. (2.4A – 4.0A)  ---Yes. 
• If TPS562201 recover from OCL, high-side FET turns on from after next cycle. ---Yes, high side will turn on a fixed value and the current is monitored in the same manner.

-       UVP

• If UVP is detected, TPS562201 is shutdown at typ 24 us, and then restart after hiccup time at typ 15 ms. ---24us is delay time. After 24us, the part will enter UVP.
• What is hiccup wait time of typ 1.8 ms ? --- I copy a waveform from other part datasheet. The mechanism is the same, the time may be different.

-       Thermal shutdown

• If the temperature exceeds typ 160 degree, TPS56201 is shutdown. ---Yes.160 degree is a typical value, will have some variation from part to part.
• How to recover shut down mode ? ---If the temp lower than 25 degree than thermal *** down value, the IC will restart automatically.

Thanks,

Lishuang