RT9527 查看數據表（PDF） - Richtek Technology

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RT9527

Single Cell Li-Ion Battery Charger with Adjustable Charging Current for Portable Applications

Richtek Technology 

®

RT9527

Single Cell Li-Ion Battery Charger with Adjustable Charging

Current for Portable Applications

General Description

The RT9527 is a low cost single-cell Li-ion charger for low

current charge applications.

The RT9527 can be powered up from an AC adapter or

USB (Universal Serial Bus) port inputs. The RT9527 enters

sleep mode when VIN power is removed. The RT9527

optimizes the charging task by using a control algorithm,

which includes pre-charge mode, fast-charge mode and

constant voltage mode. The charging task is kept in

constant voltage mode to hold the battery in a full charge

condition. The charge current is adjustable via an external

resistor. The internal thermal feedback circuitry regulates

the die temperature to optimize the charge rate for all

ambient temperatures. The RT9527 features 28V

maximum rating voltages for VIN. Other features include

under voltage protection and over voltage protection for

the AC adapter supply.

The RT9527 is available in a WDFN-8L 2x2 package.

Ordering Information

RT9527

Package Type

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

Note :

Lead Plating System

G : Green (Halogen Free and Pb Free)

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.

Features

 28V Maximum Rating for AC Adapter

 Internal Integrated Power FETs

 Adjustable Charging Current

 Programmable Safe Charge Timer

 NTC Thermistor Input

 Battery Reverse Protection

 ISET Pin Short Protection

 Charge Status Indicator

 AC Adapter Power Good Status Indicator

 End of Charge Current is 10% of Fast-Charge Current

 Under Voltage Protection

 Over Voltage Protection

 Thermal Feedback Optimized Charge Rate

 Small Thermally Enhanced 8-Lead WDFN Package

 RoHS Compliant and Halogen Free

Applications

 Cellular Phones

 Digital Cameras

 PDAs and Smart Phone

 Portable Instruments

Marking Information

0S : Product Code

0SW

W : Date Code

Simplified Application Circuit

Input Power

VIN

BAT

RT9527

TIMER

PGOOD

CHG

ISET GND

Battery

Indicator

Copyright ©2014 Richtek Technology Corporation. All rights reserved.

DS9527-02 May 2014

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

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