Rainbow-electronics MAX8922L Uživatelský manuál stáhnout pdf

General Description

The MAX8922L linear battery charger safely charges a

single-cell lithium-ion (Li+) battery. Charging rate is

optimized to accommodate the thermal characteristics

of a given application. There is no need to reduce the

maximum charge current at the worst-case charger

power dissipation. Charging is optimized for a single

Li+ cell using a control algorithm that includes low-bat-

tery precharging, voltage and current-limited fast

charging, and top-off charging, while continuously

monitoring for input overvoltage and device die-temper-

ature conditions. The fast-charge current and top-off

current thresholds are programmable by a simple

1-Wire

serial interface. The charger status and valid

input power are indicated by two open-drain outputs

(CHG and POK).

The fast-charge current is defaulted to 400mA and pro-

grammable through the 1-Wire interface (EN/SET). The

MAX8922L also can be programmable to GSM test

mode through the 1-Wire interface.

The MAX8922L is available in a tiny (3mm x 2mm x

0.8mm) 10-pin TDFN package.

Applications

GSM/EDGE/UMTS/CDMA Cell Phones

Digital Cameras

PDAs

Portable Media Players and MP3 Players

Wireless Appliances

Features

o Overvoltage-Protected 30V

Rated Input (IN)

o Input Overvoltage-Protected Safe 4.94V LDO

Output

o 2.3A GSM RF Test Mode

o No External FET, Blocking Diode, or Sense

Resistor Required

o 1-Wire Easy Programmable Fast-Charge and GSM

Test Mode (EN/SET)

o Resistor-Programmable Fast-Charge Current

(SETI)

o Resistor-Programmable Top-Off Current

Threshold (MIN)

o Prequalification Charge

o Power-OK Monitor Output (POK)

o Charging-Status Output (CHG)

o Die Temperature Regulation for Optimized

Charge Rate

o Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package

MAX8922L

30V Li+ Linear Battery Charger

with GSM Test Mode in 3mm x 2mm TDFN

________________________________________________________________

Maxim Integrated Products

19-4929; Rev 0; 9/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART PIN-PACKAGE TOP MARK

MAX8922LETB+T 10 TDFN-EP* AWN

Denotes a lead(Pb)-free and RoHS-compliant package.

EP = Exposed pad.

Note: This device operates in the -40°C to +85°C extended

operating temperature range.

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

USB/AC ADAPTER

4.45V TO 30V

BAT

EN\SET

GND

LDO

SETI

MIN

POK

CHG

SYSTEM SUPPLY

SETI

MIN

TEST

MAX8922L

Typical Operating Circuit

*EP

*EP = EXPOSED PAD.

BAT

CHG

TEST

GND

LDO

MAX8922L

POKSETI

EN/SETMIN

TDFN

(3mm x 2mm x 0.8mm)

TOP VIEW

Pin Configuration

1 2 3 4 5 6 ... 13 14

MAX8922L 1

Shrnutí obsahu

Strany 1 - MAX8922L

General DescriptionThe MAX8922L linear battery charger safely charges asingle-cell lithium-ion (Li+) battery. Charging rate isoptimized to accommodate

Strany 2

MAX8922LThermal ConsiderationsThe MAX8922L is in a thermally enhanced TDFN pack-age with an exposed pad. Connect the exposed pad ofthe package to a la

Strany 3

USB ChargeThe universal serial bus (USB) provides a high-speedserial communications port as well as power for theremote device. The MAX8922L can be co

Strany 4

MAX8922L30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN12 ________________________________________________________________________

Strany 5

MAX8922LPACKAGE TYPE PACKAGE CODE DOCUMENT NO.10 TDFN-EP T1032N-121-0429Package InformationFor the latest package outline information and land pattern

Strany 6

MAX8922L30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFNMaxim cannot assume responsibility for use of any circuitry other than circ

Strany 7

MAX8922L30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN2 _________________________________________________________________________

Strany 8

MAX8922L30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN___________________________________________________________________________

Strany 9

CHARGE CURRENT vs.SUPPLY VOLTAGEMAX8922 toc04SUPPLY VOLTAGE (V)CHARGE CURRENT (mA)272418 216 9 12 153501001502002503003504004505000030400mA DEFAULTVBA

Strany 10

1002003004005006000CHARGE CURRENT (mA)MAX8922 toc10CHARGE CURRENT vs.AMBIENT TEMPERATURE603510-15-40 85AMBIENT TEMPERATURE (°C)400mA PRESETVIN = 5VVBA

Strany 11

MAX8922L30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN6 _________________________________________________________________________

Strany 12

Detailed DescriptionThe MAX8922L is designed to charge a single-cell Li+battery from a DC source voltage between 4.45V and7V, while VINcan withstand u

Strany 13

MAX8922LPower-OK Indicator (POK)The MAX8922L contains an open-drain POK output thatgoes low when VINis greater than VUVLOand lower thanVOVPand VINexce

Strany 14

LDO OutputThe LDO is preset to an output voltage of 4.94V and a100mA current limit (typ). The LDO is powered from INand has input overvoltage protecti

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Rainbow-electronics MAX8922L Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Senzory Rainbow-electronics MAX8922L. Rainbow Electronics MAX8922L User Manual Uživatelská příručka

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