BQ24273 Datasheet, PDF (7/27 Pages) Texas Instruments – 2.5A, Single Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense

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bq24273
SLUSB08 – JUNE 2012
NAME
TS
STAT
Thermal
Pad
PIN
bq24273 (YFF) I/O
G5
G6
–
–
PIN FUNCTIONS (continued)
DESCRIPTION
Battery Pack NTC Monitor. Connect TS to the center tap of a resistor divider from DRV to GND.
The NTC is connected from TS to GND. The TS function in the bq24276 provides 2 thresholds for
Hot/ Cold shutoff, while the bq24277 has 2 additional thresholds for JEITA compliance. See the
NTC Monitor section for more details on operation and selecting the resistor values.
Status Output – STAT is an open-drain output that signals charging status and fault interrupts.
STAT pulls low during charging. STAT is high impedance when charging is complete or the
charger is disabled. When a fault occurs, a 128μs pulse is sent out as an interrupt for the host.
STAT is enabled/ disabled using the EN_STAT bit in the control register. Pull STAT up to a logic
rail through an LED for visual indication or through a 10kΩ resistor to communicate with the host
processor.
There is an internal electrical connection between the exposed thermal pad and the VSS pin of
the device. The thermal pad must be connected to the same potential as the VSS pin on the
printed circuit board. Do not use the thermal pad as the primary ground input for the device. VSS
pin must be connected to ground at all times.
Copyright © 2012, Texas Instruments Incorporated
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