BQ24072T: Over heat issue

Rajani Togari

Part Number: BQ24072T

Hi,

I have designed a charging ckt using BQ24072TRGTR. Charging current set to1.3A. I am able to observe the charging current, but the IC is getting heated up very fast. How control the over heat issue. Please suggest.

over 4 years ago

0 Anthony P Pham over 4 years ago

TI__Mastermind 23200 points

Hi Rajani,

Since the concern is the chip overheating, I'm wondering what battery voltage and input voltage you're seeing.

Regards,

Anthony Pham

0 Rajani Togari over 4 years ago in reply to Anthony P Pham

Prodigy 60 points

Hi Anthony,

I a using 3.6V Li-Ion battery, rated capacity :2500 mAh, charge voltage : DC4.2V.

Am applying 5.2V at Vin.

Regards Rajani.

0 Anthony P Pham over 4 years ago in reply to Rajani Togari

TI__Mastermind 23200 points

Hi Rajani,

With the given information from your schematic as well (VIN = 5.2, Charge Current = 1.3A, & VBAT = 3.6V), I found the temperature to be over 100C. What temperature are you seeing?

I'd recommend decreasing the input voltage, decreasing the charge current, or adding a thermal ground plane in your design.

Regards,

Anthony Pham

0 Anthony P Pham over 4 years ago in reply to Anthony P Pham

TI__Mastermind 23200 points

Hi Rajani,

Any updates?

Regards,

Anthony Pham

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BQ24072T: Over heat issue