Preliminary
RT9501A/B
Advanced Lithium-Ion Linear Battery Charger
General Description
The RT9501 is a single Lithium-Ion or Lithium-Polymer
cell linear battery charger which is designed for compact
and cost-sensitive handheld devices. It combines charge
status indication, charge termination, battery temperature
monitoring, and high accuracy current and voltage
regulation in a MSOP-8 package.
The RT9501 charges the battery in three modes,
precharge, constant current, constant voltage. If the
battery voltage is below the precharge threshold V
O(MIN)
,
the RT9501 precharges the battery with a lower
conditioning current. After precharge, the RT9501 applies
a constant current to the battery. An external sense-
resister sets the charge current. The constant voltage
mode continues until the battery reaches the regulation
voltage.
The battery temperature is continuously measured by an
external thermistor through the TS pin. The RT9501
inhibits charge until the temperature is within the range
defined by users.
Features
For Single Lithium-Ion or Lithium-Polymer Cell
Battery Pack (4.1V or 4.2V)
A Few External Components are Required
Precharge, Constant Current, Constant Voltage
Modes
Battery Temperature Monitor
Charge Status Indication
Automatic Battery Recharge
Charge Termination Detect
Auto Low Power Sleep Mode when VDD Power is
Removed
MSOP-8 Package
Applications
Digital Cameras
PDAs
Cellular Phones
Information Appliance
Pin Configurations
(TOP VIEW)
VDD
TS
STAT
GND
1
2
3
4
8
7
6
5
Ordering Information
RT9501
Package Type
F : MSOP-8
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Voltage Version
A : 4.1V
B : 4.2V
BATT
CS
FB/CE
CC
MSOP-8
勝特力科技
886-3-5753170
百年電子
86-755-83289224
Marking Information
For marking information, contact our sales representative directly or through a RichTek distributor located in your area,
otherwise visit our website for detail.
DS9501A/B-03P October 2004
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
