RT9526A Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – Linear Single Cell Li-Ion Battery Charger with Input Over Voltage Protection

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.
The other features are under voltage protection and over
voltage protection for the AC adapter supply.
The RT9526A is available in WDFN-8L 2x3 package to
achieve best solution for PCB space and total BOM cost
saving considerations.
Features
z 28V Maximum Rating for AC Adapter
z Internal Integrated Power FETs
z AC Adapter Power Good Status Indicator
z Programmed Charging Current
z Charge Status Indicator
z Programmed End of Charge Current
z Under Voltage Protection
z Over Voltage Protection
z Thermal Feedback Optimizing Charge Rate
z RoHS Compliant and Halogen Free
Applications
z Cellular Phones
z Digital Cameras
z PDAs and Smart Phones
z Portable Instruments
Pin Configurations
(TOP VIEW)
Ordering Information
RT9526A
Package Type
QW : 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.
VIN 1
PGB 2
CHG_SB 3
ENB 4
8 BATT
7 ISET
6 IMIN
9 5 GND
WDFN-8L 2x3
Marking Information
05 : Product Code
05W
W : Date Code
DS9526A-01 April 2011
www.richtek.com
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