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RT9527

Description
Single Cell Li-Ion Battery Charger with Adjustable Charging Current for Portable Applications
CategoryPower/power management    SingleCellLi-Ion   
File Size203KB,14 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric View All

RT9527 Overview

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

RT9527 Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)4.4
Vin (max)(V)6
Battery Charge Voltage (max)(V)4.2
Battery Charge Current (max)(A)0.6
Input SourceAC Adapter;USB
FeaturesOVP;Power Good;UVP
Package TypeWDFN2x2-8
®
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.
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
Ordering Information
RT9527
Package Type
QW : WDFN-8L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
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.
Marking Information
0S : Product Code
0SW
W : Date Code
Simplified Application Circuit
Input Power
VIN
RT9527
BAT
Battery
TIMER
ISET
PGOOD
CHG
GND
Indicator
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9527-00 May 2012
www.richtek.com
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