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RT9519B

Description
Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
CategoryPower/power management    SingleCellLi-Ion   
File Size378KB,18 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric View All

RT9519B Overview

Linear Single Cell Li-lon Battery Charger with Auto Power Path Management

RT9519B Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)4.4
Vin (max)(V)6
Battery Charge Voltage (max)(V)4.05;4.2
Battery Charge Current (max)(A)1.2
Input SourceAC Adapte
FeaturesEnable Input;OVP;Power Good
Package TypeWQFN3x3-20
RT9519B
Linear Single Cell Li-lon Battery Charger with Auto Power
Path Management
General Description
The RT9519B is an integrated single cell Li-ion battery
charger with Auto Power Path Management (APPM). No
external MOSFETs are required. The RT9519B 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 RT9519B, 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
28V Maximum Rating for VIN Power
Selectable Power Current Limit (0.1A / 0.5A / 1.5A)
Integrated Power MOSFETs
Auto Power Path Management (APPM)
Battery Charging Current Control
Battery Regulation Voltage Control
Programmable Charging Current and Safe Charge
Timer
Under Voltage Protection, Over Voltage Protection
Power Good and Charge Status Indicator
Optimized Charge Rate via Thermal Feedback
Thin 20-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
Digital Cameras
PDAs and Smart Phones
Portable Instruments
Ordering Information
RT9519B
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.
Pin Configurations
(TOP VIEW)
USUS
SYS
SYS
SYS
TS_FAULT
20 19 18 17 16
VIN
PGOOD
CHG
GND
ISETA
1
2
3
4
5
6
7
8
9 10
15
14
GND
21
13
12
11
VSET
ISETL
ISETU
VP
ISET
Marking Information
46= : Product Code
WQFN-20L 3x3
46=YM
DNN
YMDNN : Date Code
DS9519B-01 April 2011
TS
TIMER
BAT
BAT
EN
www.richtek.com
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