MAX1538

更新时间： 2024-09-14 23:45:47

品牌	Logo	应用领域
美信 - MAXIM		电池
页数	文件大小	规格书
22页	491K
描述
Power-Source Selector for Dual-Battery Systems

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MAX1538 数据手册

19-3169; Rev 0; 1/04

Power-Source Selector for

Dual-Battery Systems

General Description

Features

The MAX1538 selector provides power-source control

for dual-battery systems. The device selects between

an AC adapter and dual batteries based on the pres-

ence of the three power sources and the state of

charge of each battery. The MAX1538 includes analog

comparators to detect AC/airline-adapter presence and

determine battery undervoltage. Fast analog circuitry

allows the device to switch between power sources to

implement a break-before-make time, which allows hot

swapping of battery packs. The MAX1538 indepen-

dently performs power-source monitoring and selec-

tion, freeing the system power-management µP for

other tasks. This simplifies the development of µP

power-management firmware and allows the µP to enter

standby, reducing system power consumption.

♦ Automatically Detects and Responds to

Low-Battery Voltage Condition

Battery Insertion and Removal

AC-Adapter Presence

Airline-Adapter Presence

♦ Step-Down and Step-Up Charger Compatibility

♦ Fast Break-Before-Make Selection

Allows Hot Swapping of Power Sources

No External Schottky Diodes Needed

♦ 50µA Maximum Battery Quiescent Current

♦ Implements Battery Capacity Relearning

♦ Allows Usage of Aircraft Supply

♦ Direct Drive of P-Channel MOSFETs

The MAX1538 supports “relearn mode,” which allows

the system to measure and fully utilize battery capacity.

In this state, the part allows the selected battery to be

discharged even when an AC adapter is present. The

MAX1538 can also be used to power the system in an

aircraft. On detecting an airline adapter, the MAX1538

automatically disables charging or discharging of bat-

tery packs and only allows the system to be powered

from the adapter.

♦ Simplifies Power-Management µP Firmware

♦ 4.75V to 28V AC-Adapter Input Voltage Range

♦ Small 28-Pin Thin QFN Package (5mm x 5mm)

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX1538ETI

-40°C to +85°C

28 Thin QFN

The MAX1538 is available in a space-saving 28-pin thin

QFN package with a maximum footprint of 5mm x 5mm.

Typical Operating Circuit

Applications

Notebook and Subnotebook Computers

ACDET

CHRG

AIRDET

BATSEL

Internet Tablets

RELRN

ADPIN

OUT2

Dual-Battery Portable Equipment

OUT1

REVBLK

OUT0

EXTLD

BATTERY

CHARGER

MAX1538

ADPBLK

CHG_OUT

CHGIN

CHGA

MINVA

MINVB

Pin Configuration appears at end of data sheet.

CHGB

DISB

GND

DISA

BATB

BATA

BATSUP

________________________________________________________________ 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...22

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与MAX1538相关器件

型号	品牌	获取价格	描述	数据表
MAX1538ETI	MAXIM	获取价格	Power-Source Selector for Dual-Battery Systems
MAX1538ETI+	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
MAX1538ETI-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
MAX1538EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1538
MAX153C/D	MAXIM	获取价格	1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP	MAXIM	获取价格	1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP+T	MAXIM	获取价格	ADC, Flash Method, 8-Bit, 1 Func, 1 Channel, Parallel, 8 Bits Access, CMOS, PDSO20, SSOP-2
MAX153CAP-T	MAXIM	获取价格	ADC, Flash Method, 8-Bit, 1 Func, 2 Channel, Parallel, 8 Bits Access, CMOS, PDSO20, SSOP-2
MAX153CPP	MAXIM	获取价格	1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CPP+	MAXIM	获取价格	ADC, Flash Method, 8-Bit, 1 Func, 2 Channel, Parallel, 8 Bits Access, CMOS, PDIP20, 0.300

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