RT9481 datasheet(3/41 Pages) RICHTEK

3 / 41 page

RT9481

is a registered trademark of Richtek Technology Corporation.

DS9481-00 June 2015

www.richtek.com

Functional Pin Description

Pin No.

Pin Name

Pin Function

1, 2

USBOUT

USB Power Output.

VHMID

Internal Use Only.

4, 5

VBUS

VBUS Power Supply.

D-

D- Input for Adapter Detection.

D+

D+ Input for Adapter Detection.

ISENSP

Charging Current Sensing Positive Node.

ISENSN

Charging Current Sensing Negative Node and Connect to Battery Plus

Terminal.

Battery Temperature Detection Pin.

DCP Controller DM Output.

DCP Controller DP Output.

VDD28V

Internal Use LDO Output.

VDDA

Internal Power for Analog Blocks, Put 1

F to GND.

15,

25 (Exposed Pad)

AGND

Analog Ground Node. The exposed pad must be soldered to a large PCB and

connected to AGND for maximum power dissipation.

INT

Interrupter Signal. Connect an external pull-up resistor.

SDA

Data Input and Output for I2C Serial Port. Connect an external pull-up resistor.

SCL

Clock Input for I2C Serial Port. Connect an external pull-up resistor.

19, 20

PGND

Power Ground for Switching Charger.

21, 22

Internal Switch Node to Output Inductor Connection.

VMID

Connection Point Between Reverse Blocking and High-Side.

BOOT

Bootstrap Power Node for Switching Charger.

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