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RT9525

Description
Linear Single Cell Li-Ion Battery Charger with Auto Power Path
CategoryPower/power management    SingleCellLi-Ion   
File Size423KB,15 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric View All

RT9525 Overview

Linear Single Cell Li-Ion Battery Charger with Auto Power Path

RT9525 Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)4.2
Vin (max)(V)6
Battery Charge Voltage (max)(V)4.2
Battery Charge Current (max)(A)1.2
Input SourceAC Adapter;USB
FeaturesEnable Input;OVP;Power Good;UVP
Package TypeWQFN3x3-16
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.
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)
Programmable Charging Current Timer and Safe
Charge Timer
Under Voltage Protection
Over Voltage Protection
Power Good and Charger Status Indicator
Optimized Charge Rate via Thermal Feedback
16-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
Digital Cameras
PDAs and Smart Phones
Portable Instruments
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.
Pin Configurations
(TOP VIEW)
ISETA
SYSOFF
TIMER
VIN
16 15 14 13
TS
BAT
BAT
EN
1
2
3
4
5
6
12
GND
17
7
8
11
10
9
NC
SYS
SYS
CHG
Marking Information
JG = : Product Code
JG=YM
DNN
YMDNN : Date Code
WQFN-16L 3x3
DS9525-01 May 2011
EN2
EN1
PGOOD
GND
www.richtek.com
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