TPS3808G01DBVEVM: the resister value range of SENSEN pin

Hi Jianyan,

With the current resistor configuration, the voltage threshold is set to 5.67V. For a threshold at 4V, please use R1= 1.6M and R2=180k.

For your issue are you seeing that the RESET does not assert at 4V, meaning RESET pin stays high even with Vsense is below 4V?

Jesse  

the voltage threshold is set to 5.67V，but when it drop to 4V,the RESET pin stays high 

Are you able to probe on the Sense pin and see the pin is detecting.

Jesse 

I test on the Vin .is the value of R1,R2 is too large, the response time is slow

The R1 and R2 values are fine. My concern is that SENSE pin is not detecting the intended voltage at the given threshold. Please make sure that the Sense pin is detecting 405mV when VIN is at 5.67V.

Jesse 

Got it，i will test it.

many thanks! 

what's the value range of R1 and R2?