Datasheet > MAX712_02

MAX712_02

更新时间： 2024-02-27 04:32:32

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	777K
描述
NiCd/NiMH Battery Fast-Charge Controllers

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数据手册

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MAX712_02 数据手册

19-0100; Rev 5; 4/02

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 or Switch-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

For high-power charging requirements, the MAX712/

MAX713 can be configured as a switch-mode battery

charger that minimizes power dissipation. Two evaluation

kits are available: Order the MAX712EVKIT-DIP for quick

evaluation of the linear charger, and the MAX713EVKIT-

SO to evaluate the switch-mode charger.

0°C to +70°C

-40°C to +85°C

-55°C to +125°C

16 Plastic DIP

16 Narrow SO

16 CERDIP**

________________________Applications

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

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

Battery-Powered Equipment

Laptop, Notebook, and Palmtop Computers

Handy-Terminals

Cellular Phones

Typical Operating Circuit

Portable Consumer Products

Portable Stereos

2N6109

DC IN

Cordless Phones

150Ω

0.01µF

Pin Configuration

DRV

THI

V+

WALL

CUBE

1N4001

TOP VIEW

REF

V+

VLIMIT

BATT+

PGM0

PGM1

THI

VLIMIT

REF

BATT+

1µF

DRV

68kΩ

10µF

MAX712

MAX713

BATTERY

13 GND

12 BATT-

11 CC

MAX712

MAX713

TEMP

LOAD

22kΩ

10µF

CC BATT- TLO GND

TLO

PGM3

PGM2

TEMP

0.01µF

FASTCHG

SENSE

SEE FIGURE 19 FOR SWITCH-MODE CHARGER CIRCUIT.

DIP/SO

________________________________________________________________ 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.

12 3 4 5 6 7...17

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