RT9527

2

DS9527-00 May 2012

www.richtek.com

©

Copyright

2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

Function Block Diagram

Pin No.

Pin Name

Pin Function

1

VIN

Supply Voltage Input. VIN can withstand up to 28V input.

2

PGOOD

Power Good Status Output. Active-low, open-drain output.

3

CHG

Charger Status Output. Active-low, open-drain output.

4,

9 (Exposed Pad)

GND

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

GND for maximum power dissipation.

5

ISET

Charge Current Setting.

6

TIMER

Safe-Charge Timer Setting.

7

TS

Temperature Sense Input. The TS pin connects to a battery’s thermistor to

determine whether the battery is too hot or too cold for charging operation. If the

battery’s temperature is out of range, charging is paused until it re-enters the

valid range.

8

BAT

Charge Current Output for Battery.

Sleep

Mode

Current

Set Block

OVP

UVLO

BASE

Switch

Well

Thermal

Circuit

TIMER

CC/CV/TR

Multi Loop

Controller

Logic

+

-

+

-

VCC

VIN

ISET

BAT

TS

TMIER

CHG

PGOOD

GND

Too Cold

Too Hot

Ordering Information

Note :

Richtek products are :

RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Suitable for use in SnPb or Pb-free soldering processes.

Pin Configurations

(TOP VIEW)

WDFN-8L 2x2

VIN

GND

PGOOD

BAT

TS

TIMER

ISET

CHG

7

6

5

1

2

3

4

8

9

RT9527

Package Type

QW : WDFN-8L 2x2 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)