BQ25601 Datasheet, PDF (5/60 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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NAME
Pin
NO.
STAT
4
19
SW
20
15
SYS
16
TS
11
VAC
1
VBUS
24
Thermal Pad
—
bq25601
SLUSCK5 – MARCH 2017
Pin Functions (continued)
TYPE ⁽¹⁾
DESCRIPTION
Open-drain charge status output. Connect the STAT pin to a logic rail via 10-kΩ resistor. The STAT pin indicates
charger status. Collect a current limit resister and a LED from a rail to this pin.
DO
Charge in progress: LOW
Charge complete or charger in SLEEP mode: HIGH
Charge suspend (fault response): 1-Hz, 50% duty cycle Pulses
This pin can be disabled via EN_ICHG_MON[1:0] register bits.
P
Switching node output. Connected to output inductor. Connect the 0.047-μF bootstrap capacitor from SW to BTST.
P
Converter output connection point. The internal current sensing network is connected between SYS and BAT.
Connect a 20 µF capacitor close to the SYS pin.
Temperature qualification voltage input to support JEITA profile. Connect a negative temperature coefficient
AI
thermistor. Program temperature window with a resistor divider from REGN to TS to GND. Charge suspends when
either TS pin is out of range. When TS pin is not used, connect a 10-kΩ resistor from REGN to TS and connect a
10-kΩ resistor from TS to GND. It is recommended to use a 103AT-2 thermistor.
AI
Charge input voltage sense. This pin must be connected to VBUS pin.
P
Charger input. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID
pins. Place a 1-uF ceramic capacitor from VBUS to GND close to device.
Thermal pad and ground reference. This pad is ground reference for the device and it is also the thermal pad used
P
to conduct heat from the device. This pad should be tied externally to a ground plane through PCB vias under the
pad.
Copyright © 2017, Texas Instruments Incorporated
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