RT9730

2

DS9730-01 April 2011

www.richtek.com

Function Block Diagram

Functional Pin Description

Pin No.

Pin Name

Pin Function

1, 2

ACIN

Input Power Source Pin. It can withstand up to 30V input.

3,

9 (Exposed pad)

GND

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

connected to GND for maximum power dissipation..

4

NC

No Internal Connection.

5

GATDRV

External control pin for controlling the P-MOSFET by charging controller.

6

CHRIN

Voltage is equal to VIN as VIN in power good range and providing

≅25mA for

system at most.

7, 8

OUT

Connect to OUT resistor and OUT pin of charging controller.

Control

Logic

MUX

SW

SW

INOVP

UVLO

OTP

ACIN

OUT

CHRIN

GND

GATDRV