BQ25601 Datasheet, PDF (27/60 Pages) Texas Instruments – I2C Controlled 3-A, Single-Cell Battery Charger for High Input Voltage and Narrow Voltage DC (NVDC) Power Path Management

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SYS
Q4
Control
BAT
V_PULL-UP
+
QON
bq25601
SLUSCK5 – MARCH 2017
Figure 19. QON Circuit
8.4.9 Status Outputs (PG, STAT, INT)
8.4.9.1 Power Good indicator (PG Pin and PG_STAT Bit)
The PG_STAT bit goes HIGH and PG pin goes LOW to indicate a good input source when:
• VBUS above V_{VBUS_UVLO}
• VBUS above battery (not in sleep)
• VBUS below V_{VAC_OV} threshold
• VBUS above V_VBUSMin (typical 3.8 V) when I_BADSRC (typical 30 mA) current is applied (not a poor source)
• Completed input Source Type Detection
8.4.9.2 Charging Status indicator (STAT)
The device indicates charging state on the open drain STAT pin. The STAT pin can drive LED. The STAT pin
function can be disabled by setting the EN_ICHG_MON bits = 11.
Table 4. STAT Pin State
CHARGING STATE
Charging in progress (including recharge)
Charging complete
Sleep mode, charge disable
Charge suspend (input overvoltage, TS fault, timer fault or system overvoltage)
Boost Mode suspend (due to TS fault)
STAT INDICATOR
LOW
HIGH
HIGH
Blinking at 1 Hz
8.4.9.3 interrupt to Host (INT)
in some applications, the host does not always monitor the charger operation. The INT pulse notifies the system
on the device operation. The following events will generate 256-μs INT pulse.
• USB/adapter source identified (through PSEL detection)
• Good input source detected
– VBUS above battery (not in sleep)
– VBUS below V_{VAC_OV} threshold
– VBUS above V_VBUSMin (typical 3.8 V) when I_BADSRC (typical 30 mA) current is applied (not a poor source)
• input removed
• Charge Complete
• Any FAULT event in REG09
• VINDPM / IINDPM event detected (maskable)
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