Datasheet > MAX712_08

MAX712_08

更新时间： 2024-02-09 03:18:35

品牌	Logo	应用领域
美信 - MAXIM		电池控制器
页数	文件大小	规格书
17页	219K
描述
NiCd/NiMH Battery Fast-Charge Controllers

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MAX712_08 数据手册

19-0100; Rev 6; 12/08

NiCd/NiMH Battery

Fast-Charge Controllers

General Description

Features

The MAX712/MAX713 fast-charge Nickel Metal Hydride

(NiMH) and Nickel Cadmium (NiCd) batteries from a DC

source at least 1.5V higher than the maximum battery

voltage. 1 to 16 series cells can be charged at rates up

to 4C. A voltage-slope detecting analog-to-digital convert-

er, timer, and temperature window comparator determine

charge completion. The MAX712/MAX713 are powered

by the DC source via an on-board +5V shunt regulator.

They draw a maximum of 5µA from the battery when not

charging. A low-side current-sense resistor allows the

battery charge current to be regulated while still

supplying power to the battery’s load.

♦ Fast-Charge NiMH or NiCd Batteries

♦ Voltage Slope, Temperature, and Timer

Fast-Charge Cutoff

♦ Charge 1 to 16 Series Cells

♦ Supply Battery’s Load While Charging

(Linear Mode)

♦ Fast Charge from C/4 to 4C Rate

♦ C/16 Trickle-Charge Rate

♦ Automatically Switch from Fast to Trickle Charge

♦ Linear Mode Power Control

♦ 5µA (max) Drain on Battery when Not Charging

♦ 5V Shunt Regulator Powers External Logic

The MAX712 terminates fast charge by detecting zero

voltage slope, while the MAX713 uses a negative

voltage-slope detection scheme. Both parts come in 16-

pin DIP and SO packages. An external power PNP tran-

sistor, blocking diode, three resistors, and three

capacitors are the only required external components.

Ordering Information

PART

TEMP RANGE

0°C to +70°C

PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

Dice*

MAX712CPE

MAX712CSE

MAX712C/D

MAX712EPE

MAX712ESE

MAX712MJE

The evaluation kit is available: Order the MAX712EVKIT-

DIP for quick evaluation of the linear charger.

0°C to +70°C

________________________Applications

-40°C to +85°C

-55°C to +125°C

16 Plastic DIP

16 Narrow SO

16 CERDIP**

Battery-Powered Equipment

Laptop, Notebook, and Palmtop Computers

Handy-Terminals

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

**Contact factory for availability and processing to MIL-STD-883.

Cellular Phones

Portable Consumer Products

Portable Stereos

Cordless Phones

Typical Operating Circuit

2N6109

DC IN

150Ω

0.01μF

Pin Configuration

DRV

THI

V+

1N4001

WALL

CUBE

TOP VIEW

REF

V+

VLIMIT

BATT+

PGM0

PGM1

THI

VLIMIT

REF

1μF

BATT+

DRV

GND

68kΩ

10μF

MAX712

MAX713

BATTERY

MAX712

MAX713

TEMP

12 BATT-

11 CC

LOAD

22kΩ

TLO

10μF

CC BATT- TLO GND

PGM3

PGM2

TEMP

0.01μF

FASTCHG

SENSE

DIP/SO

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...17

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