RT9519A Datasheet, PDF (1/17 Pages) Richtek Technology Corporation – Linear Single Cell Li-lon Battery Charger with Auto Power Path Management

RT9519A
Linear Single Cell Li-lon Battery Charger with Auto Power
Path Management
General Description
The RT9519A is an integrated single cell Li-ion battery
charger with Auto Power Path Management (APPM). No
external MOSFETs are required. The RT9519A 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 RT9519A, the charge
current can also be programmed with an external resistor
and modified with an external GPIO. The scope that the
battery regulation voltage can be modified with an external
GPIO depends on the battery temperature. 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 10% x I_{CHG_FAST}. Other features
include under voltage protection and over voltage protection
for VIN the supply.
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 Battery Charging Current Control
z Battery Regulation Voltage Control
z Programmable Charging Current and Safe Charge
Timer
z Under Voltage Protection, Over Voltage Protection
z Power Good and Charge Status Indicator
z Optimized Charge Rate via Thermal Feedback
z Thin 20-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Digital Cameras
z PDAs and Smart Phones
z Portable Instruments
Ordering
RT9519A
Information
Package Type
QW : WQFN-20L 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
Pin Configurations
(TOP VIEW)
VIN
PGOOD
CHG
GND
ISETA
20 19 18 17 16
1
15 VSET
2
14 ISETL
3
GND 13 ISETU
4
21 12 VP
5
11 ISET
6 7 8 9 10
WQFN-20L 3x3
JF=YM
DNN
JF= : Product Code
YMDNN : Date Code
DS9519A-02 April 2011
www.richtek.com
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