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RT9526

Description
Linear Single Cell Li-Ion Battery Charger with Input Over Voltage Protection
CategoryPower/power management    SingleCellLi-Ion   
File Size249KB,14 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric View All

RT9526 Overview

Linear Single Cell Li-Ion Battery Charger with Input Over Voltage Protection

RT9526 Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)4.5
Vin (max)(V)6
Battery Charge Voltage (max)(V)4.2
Battery Charge Current (max)(A)1
Input SourceAC Adapter;USB
FeaturesEnable Input;OVP;Power Good;UVP
Package TypeWDFN2x2-8;WDFN2x3-8;SOT-26
Datasheethttps://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS9526-01.pdf
RT9526
Linear Single Cell Li-Ion Battery Charger with Input Over
Voltage Protection
General Description
The RT9526 is a fully integrated low cost single cell Li-ion
battery charger ideal for portable applications. The RT9526
is capable of being powered up from AC adapter and USB
(Universal Serial Bus) port inputs. The RT9526 enters
sleep mode when supplies are removed. The RT9526
optimizes the charging task by using a control algorithm
including preconditioning mode, fast charge mode, and
constant voltage mode. The charging task will remain in
constant voltage mode to hold the battery in a full charge
condition. The charge current can be programmed with an
external resistor. The internal thermal feedback circuitry
regulates the die temperature to optimize the charge rate
under all ambient temperatures. The RT9526 features 28V
maximum rating voltage for VIN. The other features are
under voltage protection and over voltage protection for
the AC adapter supply.
The RT9526 is available in WDFN-8L
2x2, WDFN-8L 2x3
and SOT-23-6 packages to achieve best solution for PCB
space and total BOM cost saving considerations.
Features
28V Maximum Rating for AC Adapter
Internal Integrated Power FETs
AC Adapter Power Good Status Indicator
Programmed Charging Current
Charge Status Indicator
Programmed End of Charge Current
Under Voltage Protection
Over Voltage Protection
Thermal Feedback Optimizing Charge Rate
RoHS Compliant and Halogen Free
Applications
Cellular Phones
Digital Cameras
PDAs and Smart Phones
Portable Instruments
Pin Configurations
(TOP VIEW)
IMIN ISET BATT
6
5
2
4
3
Ordering Information
RT9526
Package Type
E : SOT-23-6
QW : WDFN-8L 2x2 (W-Type)
QWA : WDFN-8L 2x3 (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.
CHG_SB GND VIN
SOT-23-6
VIN
PGB
CHG_SB
ENB
2
3
4
GND
1
8
7
6
5
9
BATT
ISET
IMIN
GND
WDFN-8L 2x2
VIN
PGB
CHG_SB
ENB
1
2
3
4
9
8
7
6
5
BATT
ISET
IMIN
GND
WDFN-8L 2x3
DS9526-01 April 2011
GND
www.richtek.com
1
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