RT9526 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Linear Single Cell Li-Ion Battery Charger with Input Over Voltage Protection

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.
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.
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)
IMIN ISET BATT
6
5
4
2
3
CHG_SB GND VIN
SOT-23-6
VIN 1
PGB 2
CHG_SB 3
ENB 4
8 BATT
7 ISET
6 IMIN
9 _{5 GND}
WDFN-8L 2x2
VIN 1
PGB 2
CHG_SB 3
ENB 4
8 BATT
7 ISET
6 IMIN
9 5 GND
WDFN-8L 2x3
DS9526-01 April 2011
www.richtek.com
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