ZHCS292H september 2009 – february 2021 BQ24040 , BQ24041 , BQ24045
PRODUCTION DATA
For host monitoring, a pullup resistor is used between the STATUS terminal and the VCC of the host and for a visual indication a resistor in series with an LED is connected between the STATUS terminal and a power source. If the CHG or PG source is capable of exceeding 7V, a 6.2V Zener should be used to clamp the voltage. If the source is the OUT terminal, note that as the battery changes voltage, and the brightness of the LEDs vary.
| CHARGING STATE | CHG FET/LED |
|---|---|
| First charge after VIN applied | ON |
| Refresh charge | OFF |
| OVP | |
| SLEEP | |
| TEMP FAULT | ON for 1st Charge |
| VIN POWER GOOD STATE | PG FET/LED |
|---|---|
| UVLO | OFF |
| SLEEP mode | |
| OVP mode | |
| Normal input (VOUT + VDT < VIN < VOUP) | ON |
| PG is independent of chip disable | |