BQ76952: BQ76952 over temperature shutdown problem

Hello Xiang,

Can you describe in more detail what exactly are you seeing? What is the voltage of REG18?

Can you share your settings (as a .gg.csv file)?

Best Regards,

Luis Hernandez Salomon

We tested the performance of low temperature from -40 ° C to 85 ° C, and when -40 ° C increased to below 65 ° C, AFE collection was normal, REG18 output 1.8V and internal LDO output 3.3V. When the temperature rose to 66 ° C, AFE collection was interrupted and it was found that the internal LDO output stopped，and  the voltage of REG18 is 1.8V at the temperatures above 66 ° C

Below picture is the setting file

Hi Luis,did you get  results on this question

Hello Xiang,

If SOT is raised to a higher threshold, is there a problem?

Best Regards,

Luis Hernandez Salomon

We set SOT protectction over 90℃，but the actual test is protected above 66 ° C

Hello Xiang,

Since REG18 is 1.8-V, this means that the device is not in SHUTDOWN mode. This could mean that the device did not initiate SHUTDOWN, or the device entered soft-shutdown. Soft-shutdown can be entered if the device initiates a SHUTDOWN sequence and there's a thermistor/resistor to Vss on the TS2 pin.

If that's the case, the device can exit soft-shutdown by pulling RST_SHUT high for less than 1-second. Can they try this?

Best Regards,

Luis Hernandez Salomon