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Original question:

BQ76952: BQ76952

BQ76952: Doubts about adjusting the threshold of internal overheating protection points

Gabriel Wang1
Genius 4715 points
Part Number: BQ76952

Dear Chris

Background: In certain special usage scenarios, due to the high working environment temperature, the internal temperature of the chip exceeds the default over temperature protection threshold of 85 °, causing the chip over temperature protection to stop working;
Question: 1. Under the condition of ensuring that the junction temperature of the chip does not exceed 150 ° C, is there a risk of adjusting the internal overheating protection threshold of the chip to 120 ° C, and is it affecting the lifespan of the chip;
2. What impact will it have on the chip when operating in an environment with an ambient temperature exceeding 85 ° C but a junction temperature not exceeding 150 ° C, and whether it will affect the chip's service life;
Please ask Wang to help find the original factory to confirm and reply;

  • 0
    TI__Mastermind 42060 points

    Hello Gabriel,

    Gabriel Wang1 said:
    1. Under the condition of ensuring that the junction temperature of the chip does not exceed 150 ° C, is there a risk of adjusting the internal overheating protection threshold of the chip to 120 ° C, and is it affecting the lifespan of the chip;

    The device was characterized up-to 85C. We cannot warranty the datasheet specifications if the IC temperature goes above this temperature. It may also be possible to degrade the IC faster, affecting the lifespan. 

    Gabriel Wang1 said:
    2. What impact will it have on the chip when operating in an environment with an ambient temperature exceeding 85 ° C but a junction temperature not exceeding 150 ° C, and whether it will affect the chip's service life;

    Yes that could be possible. Although it could work at temperatures above 85C, we cannot warranty any of its accuracy or functions at these temperatures.

    Best Regards,

    Luis Hernandez Salomon