Hi Team,
in customer's application, there is Vbus ( 5.5v from wireless RX ) and battery ( 3.8V).
when in normal operation, REG as below.
| REG00 | 65 |
| REG01 | 1A |
| REG02 | C7 |
| REG03 | 0 |
| REG04 | 74 |
| REG05 | 8B |
| REG06 | 67 |
| REG07 | 44 |
| REG08 | 34 |
| REG09 | 0 |
| REG10 | 83 |
| REG11 | 11 |
Then write REG00[7] to " 1 " to make the part enter into HIZ mode, the part goes into HIZ first then it seems cancel HIZ mode itself and REGs as below.
From the REG, it seems charging is disabled.
| REG00 | 65 |
| REG01 | 0A |
| REG02 | C4 |
| REG03 | 0 |
| REG04 | 74 |
| REG05 | 8F |
| REG06 | 67 |
| REG07 | 44 |
| REG08 | 24 |
| REG09 | 0 |
| REG10 | 83 |
| REG11 | 11 |
I think it may be due to input source power cycle that quit the HIZ , but I monitor the Vbus voltage, the mini value is~ 4V but the drop time is very short.
So
a. what's the max threshold hold on falling UVLO ( there is 3.6V max value on Vac_uvloz and hysteresis only has 300mV typical )
b. how much time is needed to detect the UVLO?
c. Also, is it reasonable for the behavior if that's the case?
Please kindly add your comments on the issue. Thanks.
BRs
Given
