Rainbow-electronics MAX1873 Bedienungsanleitung PDF herunterladen

General Description

The low-cost MAX1873R/S/T provides all functions

needed to simply and efficiently charge 2-, 3-, or 4-

series lithium-ion cells at up to 4A or more. It provides a

regulated charging current and voltage with less than

±0.75% total voltage error at the battery terminals. An

external P-channel MOSFET operates in a step-down

DC-DC configuration to efficiently charge batteries in

low-cost designs.

The MAX1873R/S/T regulates the battery voltage and

charging current using two control loops that work

together to transition smoothly between voltage and

current regulation. An additional control loop limits cur-

rent drawn from the input source so that AC adapter

size and cost can be minimized. An analog voltage out-

put proportional to charging current is also supplied so

that an ADC or microcontroller can monitor charging

current.

The MAX1873 may also be used as an efficient current-

limited source to charge NiCd or NiMH batteries in mul-

tichemistry charger designs. The MAX1873R/S/T is

available in a space-saving 16-pin QSOP package. Use

the evaluation kit (MAX1873EVKIT) to help reduce

design time.

Applications

Notebook Computers

Portable Internet Tablets

2-, 3-, or 4-cell Li+ Battery Pack Chargers

6-, 9-, or 10-cell Ni Battery Pack Chargers

Hand-Held Instruments

Portable Desktop Assistants (PDAs)

Desktop Cradle Chargers

Features

♦ Low-Cost and Simple Circuit

♦ Charges 2-, 3-, or 4-Series Lithium-Ion Cells

♦ AC Adapter Input-Current-Limit Loop

♦ Also Charges Ni-Based Batteries

♦ Analog Output Monitors Charge Current

♦ ±0.75% Battery-Regulation Voltage

♦ 5µA Shutdown Battery Current

♦ Input Voltage Up to 28V

♦ 200mV Dropout Voltage/100% Duty Cycle

♦ Adjustable Charging Current

♦ 300kHz PWM Oscillator Reduces Noise

♦ Space-Saving 16-Pin QSOP

♦ MAX1873 Evaluation Kit Available to Speed

Designs

MAX1873

Simple Current-Limited Switch-Mode

Li+ Charger Controller

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2099; Rev 0; 7/01

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.

EVALU

ATIO

IT A

ILA

BLE

PART TEMP. RANGE PIN-PACKAGE

MAX1873REEE -40°C to +85°C 16 QSOP

MAX1873SEEE -40°C to +85°C 16 QSOP

MAX1873TEEE -40°C to +85°C 16 QSOP

Selector Guide

PART SERIES CELLS TO CHARGE

MAX1873REEE

2-Cell Li+ or 5- or 6-cell Ni Battery

MAX1873SEEE

3-Cell Li+ or 7- or 9-cell Ni Battery

MAX1873TEEE 4-Cell Li+ 10-cell Ni Battery Packs

MAX1873

GND

VADJ

REF

ICHG/EN

IOUT

DCIN

VH VL CSSP

CSSN

SYSTEM

LOAD

VIN 9V TO

28V

(9V MIN

FOR 2-

CELLS)

4V OUT PER

200mV ON R

EXT

BATT

CSB

CCI

CCS

CCV

2- TO 4-CELL

Li+

Typical Operating Circuit

Pin Configuration appears at end of data sheet.

1 2 3 4 5 6 ... 13 14

Li+ Charger Controller 1

Inhaltsverzeichnis

Seite 1 - Li+ Charger Controller

General DescriptionThe low-cost MAX1873R/S/T provides all functionsneeded to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up

Seite 2

MAX1873Charging-Current RegulatorThe charging-current regulator limits the battery charg-ing current. Current is sensed by the current-senseresistor (

Seite 3

Charge-Current Monitor OutputIOUT is an analog voltage output that is proportional tothe actual charge current. With the aid of a microcon-troller, th

Seite 4

MAX1873For example, for a 4-cell charging current of 3A, aVDCIN(MAX)of 24V, and an LIR of 0.5, L is calculated tobe 11.2µH with a peak current of 3.75

Seite 5

where COUTis the total output capacitance, VREFis thereference voltage (4.2V), VBATTis the maximum batteryregulation voltage (typically 4.2V per cell)

Seite 6

MAX1873Simple Current-Limited Switch-Mode Li+ Charger ControllerMaxim cannot assume responsibility for use of any circuitry other than circuitry entir

Seite 7

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller2 ____________________________________________________________________________________

Seite 8

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller______________________________________________________________________________________

Seite 9

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller4 ____________________________________________________________________________________

Seite 10

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller______________________________________________________________________________________

Seite 11

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller6 ____________________________________________________________________________________

Seite 12

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller______________________________________________________________________________________

Seite 13

MAX1873Simple Current-Limited Switch-Mode Li+ Charger Controller8 ____________________________________________________________________________________

Seite 14

Detailed DescriptionThe MAX1873 includes all of the functions necessary tocharge 2-, 3-, or 4-series cell lithium-ion (Li+) batterypacks. It includes

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Rainbow-electronics MAX1873 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Sensoren Rainbow-electronics MAX1873 herunter. Rainbow Electronics MAX1873 User Manual Benutzerhandbuch

Inhaltsverzeichnis

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