RT9503A View Datasheet(PDF) - Richtek Technology

Part Name

Description

View to exact match

RT9503A

Fully Integrated Linear Single Cell Li-Ion Battery Charger with Power Path

Richtek Technology 

Function Block Diagram

USB

SENSE

MOSFET

USB

P-MOSFET

RT9503A

ACIN

Charge Input

Selection

2.5V

OVP

Comparator

+

OVP

-

SENSE

MOSFET

ACIN

P-MOSFET

Timer

TIMER

ISETA

GND

Precharge

1.5k 7.5k

1µA

ACIN/USB

Temperature

VFB

Sense

DRV

Controller

OVP

Logic

VCC/USB

BATT

VOS

1µA

VH

+

- Hys

Logic

BATT

TS

AC_ON

AC_PGOOD

CHG_S

BAT_ON

ISETU

EN

SYS

Pre-Charge Phase

Fast Charge

Phase

Constant Voltage

Phase &

Re-Charge Phase

Standby Phase

Programmed

Charge Current

Battery

Voltage

4.1V Recharge

Threshold

Charging

Current

DS9503A-01 April 2011

1/10 Programmed

Charge Current

2.8V Precharge

Threshold

Charge

Complete

Charging I-V Curve

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