RT9501A RICHTEK [Richtek Technology Corporation], RT9501A Datasheet

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RT9501A

Manufacturer Part Number
RT9501A
Description
Advanced Lithium-lon Linear Battery Charger
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
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
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.
Ordering Information
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
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
Advanced Lithium-Ion Linear Battery Charger
O(MIN)
Preliminary
,
Features
Applications
Pin Configurations
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
Digital Cameras
PDAs
Cellular Phones
Information Appliance
勝特力科技 886-3-5753170
百年電子 86-755-83289224
Http://www.100y.com.tw
STAT
GND
VDD
TS
(TOP VIEW)
1
2
3
4
MSOP-8
RT9501A/B
8
7
6
5
BATT
CS
FB/CE
CC
1

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RT9501A Summary of contents

Page 1

... Auto Low Power Sleep Mode when VDD Power is Removed MSOP-8 Package Applications Digital Cameras PDAs Cellular Phones Information Appliance Pin Configurations VDD TS STAT GND 勝特力科技 886-3-5753170 百年電子 86-755-83289224 Http://www.100y.com.tw RT9501A/B (TOP VIEW) BATT FB/ MSOP-8 1 ...

Page 2

... RT9501A/B Typical Application Circuit GND Figure 1. Application circuit using P-Channel MOSFET V IN GND Figure 2. Application circuit using PNP transistor 2 Preliminary FB/ BATT 1 2 VDD GND STAT C1 0.1uF FB/ BATT 1 2 VDD ...

Page 3

... DS9501A/B-03P October 2004 勝特力科技 886-3-5753170 百年電子 86-755-83289224 Http://www.100y.com.tw Preliminary - Sleep Mode Detection + TS1 Trip - + CV Control TS2 Trip Precharge - Control + Logic Recharge Feedback FB2 RT9501A/B FB2 CC Control - REF1 - FB2 V + REF2 - FB2 V + REF3 - FB2 + ...

Page 4

... BATT − V ≥ 0.2V V BATT DD − =5V BATT DD − =5V BATT DD − =5V BATT RT9501A V O(REG) RT9501B – V I(SNS) I(SNS (TERM) V TS1 V TS2 V O(MIN) V (PRE) V O(RCH) Min Typ Max -- 1.5 2.5 ≥ ...

Page 5

... DS9501A/B-03P October 2004 Preliminary Symbol Test Condition I = 10mA STAT(LOW 5mA STAT(HIGH 5mA ( sink ) CC(LOW) O(CC) Not to exceed power rating I CC(SINK) specification (PD) RT9501A/B Min Typ Max -- 0.4 0 –0 1 勝特力科技 886-3-5753170 百年電子 86-755-83289224 Http://www.100y.com.tw ...

Page 6

... RT9501A/B Application Information Charge Profile Regulation voltage Recharge voltage Regulation current Precharge threshold voltage Precharge current = Charge termination current Detection First, the FB/CE pin must connect to VDD or a voltage divider to enable the charge function. And then if a battery is already inserted and the input power source is absent, the RT9501 will enter sleep mode to prevent draining power from battery ...

Page 7

... × × GPIO TH TL × × the resistance value in and RT9501A FB/ BATT VDD TS STAT GND R T2 Figure 5 Temperature Fault Range Normal Temperature Range Temperature Fault Range Figure ...

Page 8

... RT9501A BATT VDD TS STAT GND Figure 8. For FB pin Function × 2.1 (1+ O(REG) Charge status indication The RT9501 indicates the status of the charger on the 3-state STAT pin. The following table shows the statuses of this pin. Condition In battery charging cycle ...

Page 9

... MSOP Plastic Package 勝特力科技 886-3-5753170 百年電子 86-755-83289224 Http://www.100y.com.tw RT9501A/B L Dimensions In Inches Min Max 0.032 0.043 0.000 0.006 0.030 0.037 0.009 0.015 0.114 ...

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