Datasheet > MAX1773A

MAX1773A

更新时间： 2023-12-20 18:46:24

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
20页	1909K
描述
双电池系统电源选择器

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中文翻译

获取价格

数据手册

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MAX1773A 数据手册

EVALUATION KIT AVAILABLE

MAX1773/MAX1773A

Power Source Selector for

Dual-Battery Systems

General Description

Beneﬁts and Features

● Patented 7-MOSFET Topology Offers Low-Cost

The MAX1773/MAX1773A highly integrated ICs serve as

the control logic for a system with multiple power sources.

They directly drive external P-channel MOSFETs to select

from an AC adapter and dual battery sources for charge

and discharge. The selection is made based on the pres-

ence of the power sources and the state of the batteries.

The MAX1773/MAX1773A detect low battery conditions

using integrated analog comparators and check for the

presence of a battery by using battery thermistor outputs.

Solution

● Automatically Detects and Responds to:

• Low Battery Voltage Condition

• Battery Insertion and Removal

• AC Adapter Presence

● Direct Drive of P-Channel MOSFETs

● Simplifies Power Managemenꢀ μP Firmware

● Extends Battery Life by Allowing Power Management

The MAX1773/MAX1773A are designed for use with

a buck topology charger. They provide a simple and

easily controlled solution to a difficult analog power

control problem. The MAX1773/MAX1773A provide most

of the power source monitoring and selection, freeing

ꢀhe sysꢀem power managemenꢀ microprocessor (μP) for

other tasks. This not only simplifies development of the

power managemenꢀ firmware for ꢀhe μP buꢀ also allows

ꢀhe μP ꢀo enꢀer sꢀandby, ꢀhereby reducing sysꢀem power

consumption.

μP ꢀo Enꢀer Sꢀandby

● 4.75V to 28V AC Adapter Input Voltage Range

● Integrated LDO with 1mA Drive Capability

● Small Footprint 20-Pin TSSOP Package

Applications

● Notebook and Subnotebook Computers

● PDAs and Handy-Terminals

● Internet Tablets

The MAX1773A is recommended for new designs.

● Dual-Battery Portable Equipment

Ordering Information appears at end of data sheet.

Covered by U.S. Patent number 5,764,032.

Typical Operating Circuit

SYSTEM LOGIC SUPPLY

FROM HOST P

BATSEL

V_DD

TO HOST P

ACPRES

BATSTAT

3.3V

MINV

AC ADAPTER

INPUT

ACDET

PDS

MAX1773

MAX1773A

3.3V

EXTLD

TCOMP

THMA

BATA

BATTERY

THMB

BATB

COMA

DISA

COMB

DISB

CHGA

CHGB

STEP-DOWN

CHARGER

OUTPUT

3.3V DC-DC

CONVERTER

INPUT

SYSTEM LOAD

19-1796; Rev 2; 4/17

12 3 4 5 6 7...20

中文翻译

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与MAX1773A相关器件

型号	品牌	获取价格	描述	数据表
MAX1773AEUP	MAXIM	获取价格	Power Source Selector for Dual-Battery Systems
MAX1773AEUP+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 3 Channel, BICMOS, PDSO20, 4.40 MM, TSSOP-20
MAX1773AEUP-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 3 Channel, BICMOS, PDSO20, 4.40 MM, TSSOP-20
MAX1773EUP	MAXIM	获取价格	Power Source Selector for Dual-Battery Systems
MAX1773EUP+	MAXIM	获取价格	暂无描述
MAX1773EUP+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 3 Channel, BICMOS, PDSO20, 4.40 MM, TSSOP-20
MAX1773EUP-T	MAXIM	获取价格	暂无描述
MAX1773EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1773
MAX1774	MAXIM	获取价格	Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover
MAX1774	ADI	获取价格	双路、高效率、降压型转换器，带有备用电池切换开关

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