MAX1898EUB41+T Maxim Integrated Products, MAX1898EUB41+T Datasheet

IC CHARGER LI+ SNGL 10-UMAX

MAX1898EUB41+T

Manufacturer Part Number
MAX1898EUB41+T
Description
IC CHARGER LI+ SNGL 10-UMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1898EUB41+T

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
4.5 V ~ 12 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1898, with an external PNP or PMOS transistor,
forms a complete charger for 1-cell lithium-ion (Li+) bat-
teries. The MAX1898 provides accurate constant-cur-
rent/constant-voltage charging. Battery regulation voltage
accuracy is ±0.75% for optimum battery performance
and cycle life. Charging current is user set, but is sensed
internally so no external current-sense resistor is needed.
The MAX1898 also provides outputs to monitor charge
status, presence-of-input power source, and charge cur-
rent. Additional features include shutdown, optional
charge-cycle restart without input-power cycling, selec-
table charge termination safety timer, and low-current
preconditioning for deeply discharged cells.
The MAX1898 offers the maximum integration and func-
tionality in the smallest, most basic application circuit
possible. Very few external components are required.
The MAX1898 offers two versions to safely charge all
Li+ battery chemistries. The battery regulation voltage
is 4.2V for the MAX1898EUB42 and 4.1V for the
MAX1898EUB41. Both are available in a 10-pin ultra-
thin µMAX package.
19-2295; Rev 0; 1/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
Single-Cell Li+ Powered Portables
Self-Charging Battery Packs
PDAs
Cell Phones
Cradle Chargers
EN/OK
CHG
ISET
Linear Charger for Single-Cell Li+ Battery
CT
IN
________________________________________________________________ Maxim Integrated Products
1
2
3
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General Description
MAX1898
µMAX
Pin Configuration
Applications
10
9
8
7
6
CS
DRV
GND
BATT
RSTRT
o Simple, Safe Linear Charger
o Uses Low-Cost PNP or PMOS Pass Element
o 4.5V to 12V Input Range
o Internal Current-Sense Resistor
o ±0.75% Voltage Accuracy
o Programmable Charging Current
o Automatic Input Power-Source Detection
o LED Charge Status Indicator
o Programmable Safety Timer
o Current-Sense Monitor Output
o Optional/Adjustable Auto-Restart
o Small µMAX Package
MAX1898EUB42
MAX1898EUB41
INPUT
4.5V TO 12V
CT SETS
CHARGE
TIME
OFF
ON
PART
LED
CT
IN
CHG
EN/OK
RSTRT
Typical Operating Circuit
MAX1898
GND
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
BATT
ISET
DRV
CS
SETS CHARGE
CURRENT
PIN-PACKAGE
10 µMAX
10 µMAX
Features
OUTPUT
Li+
BATTERY
1

Related parts for MAX1898EUB41+T

MAX1898EUB41+T Summary of contents

Page 1

... EN/OK 3 ISET µMAX ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Simple, Safe Linear Charger o Uses Low-Cost PNP or PMOS Pass Element o 4.5V to 12V Input Range o Internal Current-Sense Resistor o ±0.75% Voltage Accuracy ...

Page 2

Linear Charger for Single-Cell Li+ Battery ABSOLUTE MAXIMUM RATINGS IN, DRV, CS, CHG to GND .....................................-0.3V to +14V BATT, EN, ISET, RSTRT GND ........................-0.3V to +6V DRV to IN................................................................-14V to +0. Current ....................................................................±2A DRV Continuous ...

Page 3

Linear Charger for Single-Cell Li+ Battery ELECTRICAL CHARACTERISTICS (continued 8V 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT +25°C.) A PARAMETER Maximum Voltage ( ...

Page 4

Linear Charger for Single-Cell Li+ Battery ELECTRICAL CHARACTERISTICS (continued 8V 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT PARAMETER Done, RSTRT = GND, V MAX1898EUB42 and 4.0V for MAX1898EUB41 Done, RSTRT ...

Page 5

Linear Charger for Single-Cell Li+ Battery ( 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT NORMALIZED TIMER PERIOD vs. TEMPERATURE 1.02 NORMALIZED TO +25°C 1.00 0.98 0.96 0.94 0.92 0.90 -15 ...

Page 6

Linear Charger for Single-Cell Li+ Battery PIN NAME 1 IN Sense Input. Detects power source; positive side of internal current-sense resistor. CHG Open-Drain LED Driver. See Table 1 for CHG output states. 2 Logic-Level Enable Input and Input Power OK ...

Page 7

Linear Charger for Single-Cell Li+ Battery DC IN 0.1µF LED 5mA CHG CT CHARGING FOR OSC 3hr 100nF CT TIMEOUT ISET RSET (2.8kΩ FOR 500mA CHARGE CURRENT) 280mV ISET (FALLING) CONTROL LOGIC DONE 100kΩ EN/OK ...

Page 8

Linear Charger for Single-Cell Li+ Battery 4.2 BATTERY VOLTAGE 4.0 3.8 AMP HOURS BATTERY CURRENT 3.6 3.4 POWER DISSIPATION 3 120 TIME (MINUTES) Figure 2. Li+ Charging Profile the ISET pin is 1mA per amp of ...

Page 9

Linear Charger for Single-Cell Li+ Battery power is present at IN. If there is no (or insufficient) voltage at IN, EN/OK will remain low and the charger will remain off. Battery Drain Current The MAX1898 uses advanced CMOS circuitry to ...

Page 10

Linear Charger for Single-Cell Li+ Battery 10% CHARGE CURRENT TIMEOUT/4 EXPIRES AND V < 2.5V BATT FAULT LED BLINKING AT 1.5Hz 100% CHARGER CURRENT ICHARGE > 22% OF ISET DOTTED LINE INDICATES THE STATES THAT ARE NOT AVAILABLE WHEN CT ...

Page 11

Linear Charger for Single-Cell Li+ Battery Selecting External Components The MAX1898 drives an external transistor to control charging current. The most important specifications for the pass transistor (MOSFET or bipolar) are current rating and package power dissipation. Since the MAX1898 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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