ZHCSPT0 June 2022 BQ25172
PRODUCTION DATA
The TMR pin is used to program the safety timer using a ±1% pulldown resistor. The available pulldown resistors and corresponding timer lengths are listed in the following table.
| RESISTOR | CHARGE TIMER (HR) |
|---|---|
| > 45 kΩ | No charge (open-circuit) |
| 36 kΩ | 4 hr |
| 27 kΩ | 6 hr |
| 24 kΩ | 8 hr |
| 18 kΩ | 10 hr |
| 15 kΩ | 12 hr |
| 11 kΩ | 14 hr |
| 8.2 kΩ | 16 hr |
| 6.2 kΩ | 18 hr |
| 4.7 kΩ | 20 hr |
| 3.6 kΩ | 22 hr |
| < 3.0 kΩ | No charge (short-circuit) |
If either a short- or open-circuit condition is detected, the charger stops operation and remains in the FAULT state until the input or TS pin is toggled.
Once a value has been detected, it is latched in and the pin is not continuously monitored during operation. A change in this pin is not acknowledged by the IC until the input supply or TS pin is toggled.