RT9526A_14 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Linear Single Cell Li-Ion Battery Charger

®
RT9526A
Linear Single Cell Li-Ion Battery Charger with Input Over
Voltage Protection
General Description
The RT9526A is a fully integrated low cost single cell Li-
ion battery charger ideal for portable applications. The
RT9526A is capable of being powered up from AC adapter
and USB (Universal Serial Bus) port inputs. The RT9526A
enters sleep mode when supplies are removed. The
RT9526A 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
RT9526A features 28V maximum rating voltage for VIN.
Under-voltage protection and over-voltage protection are
provided for the AC adapter supply.
The RT9526A is available in the WDFN-8L 2x3 and
SOT-23-6 package to achieve best solution for PCB space
and total BOM cost saving considerations.
Applications
 Cellular Phones
 Digital Cameras
 PDAs and Smart Phones
 Portable Instruments
Features
 28V Maximum Rating for AC Adapter with Over-
Voltage Protection 7V
 Internal Integrated Power FETs
 AC Adapter Power Good Status Indicator
 Programmed Charging Current
 Charge Status Indicator
 Programmed End of Charge Current
 Under-Voltage Protection
 Thermal Feedback Optimizing Charge Rate
 RoHS Compliant and Halogen Free
Ordering Information
RT9526A
Package Type
QW : WDFN-8L 2x3 (W-Type)
E : SOT-23-6
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.
Simplified Application Circuit
Adapter or USB
C_IN
R_ISET
R_IMIN
VIN
BATT
RT9526A
ISET
IMIN
GND
ENB
PGB
CHG_SB
C_OUT
R1
R2
V_BATT
V_BATT
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9526A-03 July 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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