RT9524 データシートの表示（PDF） - Richtek Technology

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RT9524

Linear Single Cell Li-Ion Battery Charger IC for Portable Applications

Richtek Technology 

RT9524

Typical Application Circuit

Adapter or USB

RT9524

1 VIN

CIN

BATT 10

COUT

+

BATT

RISET

RIEOC

9 PGB

2 ISET

5 IEOC

CHGSB 8

BATT

LDO 4

EN/SET 6

GND 3, 7, 11(Exposed Pad)

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

VIN

The Input Power Source.

2

ISET

Charging Current Setting.

3, 7,

11 (Exposed Pad)

GND

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

GND for maximum power dissipation.

4

LDO

LDO Output (4.9V). This pin provides 50mA output current.

5

IEOC

End-of-Charge Current Setting. The IEOC is from 5% to 5O% Ichg-fast which is

programmed by the ISET pin.

6

EN/SET Enable and Operation Mode Setting.

8

CHGSB

Indicator Output for Charging Status.

9

PGB

Indicator Output for Power Status.

10

BATT

Battery Charge Current Output.

Function Block Diagram

VIN

Base

Switch

Well

VREF

VDD

IBias

IEOC

Sleep

Mode

IEOC Set

Block

OVP

UVLO

CC/CV/TR

Multi Loop

Controller

Logic

BATT

CHGSB

PGB

Status

Current

Set Block

Current

Set Block

LDO

200k

GND

ISET

EN/SET

LDO

www.richtek.com

2

DS9524-01 April 2011

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