RT9503 查看數據表（PDF） - Richtek Technology

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RT9503

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

Richtek Technology 

Function Block Diagram

USB

SENSE

MOSFET

USB

P-MOSFET

RT9503

Charge Input

Selection

ACIN

2.5V

OVP

Comparator

+

OVP

-

SENSE

MOSFET

ACIN

P-MOSFET

Timer

TIMER

ISETA

GND

2.5V

0.5V

0.25V

Precharge

VREF

ACIN/USB

Thermal

Sense

125 C

Temperature Fault

Temperature

VFB

Sense

DRV

Loop Controller

OVP

Logic

1.5k 7.5k

1uA

Termination

Comparator

-

0.25V +

0.9V -

+

Charge

Disable

BATT

VOS

1uA

VREF Thermal VCC/USB

Sense

Logic

VH

+

- Hys

BATT

TS

AC_ON

PGOOD

CHG_S

BAT_ON

ISETU EN

SYS

Pre-Charge Phase

Fast Charge

Phase

Programmed

Charge Current

Constant Voltage

Phase &

Re-Charge Phase

Standby Phase

4.1V Recharge

Threshold

Battery

Voltage

Charging

Current

DS9503-03 April 2011

1/10 Programmed

Charge Current

2.8V Precharge

Threshold

Charging I-V Curve

Charge

Complete

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