RT9524 Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – Linear Single Cell Li-Ion Battery Charger IC for Portable Applications

RT9524
Linear Single Cell Li-Ion Battery Charger IC for Portable
Applications
General Description
The RT9524 is a fully integrated single cell Li-ion battery
charger IC ideal for portable applications. The RT9524
optimizes the charging task by using a control algorithm
including pre-charge mode, fast charge mode and constant
voltage mode. the input voltage range of the VIN pin can
be as high as 28V. When the input voltage exceeds
the OVP threshold, it will turn off the charging MOSFET
to avoid overheating of the chip.
In RT9524, the maximum charging current can be
programmed with an external resistor. For USB application,
the user can set the current to 100mA/500mA through
the EN/SET pin. For the factory mode, the RT9524 can
allow 4.2V/2.3A power pass through to support system
operation. It also provides a 50mA LDO to support the
power of peripheral circuit. The internal thermal feedback
circuit regulates the die temperature to optimize the
charge rate for all ambient temperatures. The RT9524
provides protection functions such as under voltage
protection, over voltage protection for VIN supply and
thermal protection for battery temperature.
The RT9524 is available in a WDFN-10L 3x2 package to
achieve optimized solution for PCB space and thermal
considerations.
Ordering Information
RT9524
Package Type
QW : WDFN-10L 3x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Features
z 28V Maximum Rating for DC Adapter
z Internal Integrated Power MOSFETs
z Support 4.2V/2.3A Factory Mode
z 50mA Low Dropout Voltage Regulator
z Status Pin Indicator
z Programmed Charging Current
z Under Voltage Lockout
z Over Voltage Protection
z Thermal Feedback Optimized Charge Rate
z RoHS Compliant and Halogen Free
Applications
z Cellular Phones
z Digital Cameras
z PDAs and Smart Phones
z Protable Instruments
Pin Configurations
(TOP VIEW)
VIN 1
ISET 2
GND 3
LDO 4
IEOC 5
10 BATT
9 PGB
8 CHGSB
7 GND
11 _{6 EN/SET}
WDFN-10L 3x2
Marking Information
A0W
A0 : Product Code
W : Date Code
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.
DS9524-01 April 2011
www.richtek.com
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