TPS2066C: High thermal termperaure when loading each channel 1A(total 1A*2= 2A) loading is normal? How is its curve about loading current vs thermal temperature?

Hi Novel,

For each channel, 1A is the maximum suggested load current, so the temp should be relatively high. Please check the Section 12.3 in the datasheet for the details of power dissipation and junction temperature. The chip temperature is highly related to the circuit layout, so we don't have a curve about loading current vs thermal temperature.

BR,

Ke Wang

Hi Novel,

For your questions:

1. If it's abnormal?

-> Could you check the efficiency of this chip? If it's tested at room temperature, I feel the temperature rise is a little bit high for around 1/4 W power loss. Personally I think it's abnormal and should be checked.

2. Is it acceptable?

-> Since it's not triggering the thermal shutdown, which means the junction temperature is no too high. It's decided by you and the application condition to say whether it's acceptable or not.

I'll also suggest checking the temp. measurement accuracy. For example, usually the reading from thermal camera may not be very accurate.

BR,

Ke Wang