RT9525 Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – Linear Single Cell Li-Ion Battery Charger with Auto Power Path

RT9525
Linear Single Cell Li-Ion Battery Charger with Auto Power Path
General Description
The RT9525 is an integrated single cell Li-ion battery
charger with Auto Power Path Management (APPM). No
external MOSFETs are required. The RT9525 enters sleep
mode when power is removed. Charging tasks are
optimized by using a control algorithm to vary the charge
rate including pre-charge mode, fast charge mode and
constant voltage mode. For the RT9525, the charge current
can also be programmed with an external resister.
Additionally, the internal thermal feedback circuitry
regulates the die temperature to optimize the charge rate
for all ambient temperatures. The charging task will always
be terminated in constant voltage mode when the charging
current reduces to the termination current of 20%
I_{CHG_FAST}. Other features include under voltage protection
and over voltage protection for the VIN supply.
Ordering Information
RT9525
Package Type
QW : WQFN-16L 3x3 (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.
Marking Information
JG = : Product Code
JG=YM
DNN
YMDNN : Date Code
Features
z 28V Maximum Rating for VIN Power
z Selectable Power Current Limit (0.1A / 0.5A / 1.5A)
z Integrated Power MOSFETs
z Auto Power Path Management (APPM)
z Programmable Charging Current Timer and Safe
Charge Timer
z Under Voltage Protection
z Over Voltage Protection
z Power Good and Charger Status Indicator
z Optimized Charge Rate via Thermal Feedback
z 16-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Digital Cameras
z PDAs and Smart Phones
z Portable Instruments
Pin Configurations
(TOP VIEW)
16 15 14 13
TS 1
BAT 2
BAT 3
EN 4
GND
17
12 NC
11 SYS
10 SYS
9 _CHG
5 678
WQFN-16L 3x3
DS9525-01 May 2011
www.richtek.com
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