BQ24765_15 Datasheet, PDF(4/43 Page) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs

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BQ24765_15 Datasheet, PDF (4/43 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs

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bq24765

SLUS999A â NOVEMBER 2009 â REVISED NOVEMBER 2015

www.ti.com

NAME

NO.

CSSN

CSSP

DCINA

DCINP

EAI

EAO

FBO

ICOUT

ICREF

PGND

PHASE

Pin Functions (continued)

TYPE

DESCRIPTION

PGND

Adapter current sense resistor, negative input. An optional 0.1-uF ceramic capacitor is placed from CSSN pin

to AGND for common-mode filtering. A 0.1-uF ceramic capacitor is placed from CSSN to CSSP to provide

differential-mode filtering.

Adapter current sense resistor, positive input. A 0.1-uF ceramic capacitor is placed from CSSP pin to AGND

for common-mode filtering. A 0.1-uF ceramic capacitor is placed from CSSN to CSSP to provide differential-

mode filtering.

Analog sense of IC power positive supply for internal reference bias circuit. Connect directly to adapter input,

or to diode-OR point of adapter and battery. Place a 20Î© and 0.5uF ceramic capacitor filter from adapter to

AGND pin close to the IC and connect to DCINA on the node between the resistor and capacitor.

High current input for IC power positive supply, and connection to drain of high-side power MOSFET. Place

two 10uF ceramic capacitors from DCINP to PGND pin close to the IC.

High current input for IC power positive supply, and connection to drain of high-side power MOSFET. Place

two 10uF ceramic capacitors from DCINP to PGND pin close to the IC.

High current input for IC power positive supply, and connection to drain of high-side power MOSFET. Place

two 10uF ceramic capacitors from DCINP to PGND pin close to the IC.

Error Amplifier Input for compensation. Connect the feedback compensation components from EAI to EAO.

Connect the input compensation from FBO to EAI.

Error Amplifier Output for compensation. Connect the feedback compensation components from EAO to EAI.

Typically, a capacitor in parallel with a series resistor and capacitor. This node is internally compared to the

PWM saw-tooth oscillator signal.

Feedback Output for compensation. Connect the input compensation from FBO to EAI. Typically, a resistor in

parallel with a series resistor and capacitor.

Low power mode detect active-high open-drain logic output. Place a 10kohm pull-up resistor from ICOUT pin

to the pull-up voltage rail. Place a positive feedback resistor from ICOUT pin to ICREF pin for programming

hysteresis. The output is HI when VICM pin voltage is lower than ICREF pin voltage. The output is LO when

VICM pin voltage is higher than ICREF pin voltage.

Low power voltage set input. Connect a resistor divider from VREF to ICREF, and AGND to program the

reference for the LOPWR comparator. The ICREF pin voltage is compared to the VICM pin voltage and the

logic output is given on the ICOUT open-drain pin. Connecting a positive feedback resistor from ICREF pin to

ICOUT pin programs the hysteresis.

Power ground. Connection to source of integrated low-side power MOSFET. On PCB layout, connect to

ground connection of input and output capacitors of the charger. Only connect to AGND through the power-

pad underneath the IC.

Power ground. Connection to source of integrated low-side power MOSFET. On PCB layout, connect to

ground connection of in put and out put capacitors of the charger. Only connect to AGND through the power-

pad underneath the IC.

Power ground. Connection to source of integrated low-side power MOSFET. On PCB layout, connect to

ground connection of in put and out put capacitors of the charger. Only connect to AGND through the power-

pad underneath the IC

Power ground. Connection to source of integrated low-side power MOSFET. On PCB layout, connect to

ground connection of in put and out put capacitors of the charger. Only connect to AGND through the power-

pad underneath the IC.