Datasheet > MAX8895X

MAX8895X

更新时间： 2024-11-24 02:52:03

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
45页	4176K
描述
Li-Ion Chargers with Smart Power Selector, Adapter Type Detection, and USB Enumeration

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MAX8895X 数据手册

EVALUATION KIT AVAILABLE

MAX8895V/MAX8895W/

MAX8895X/MAX8895Y

Li-Ion Chargers with Smart Power Selector,

Adapter Type Detection, and USB Enumeration

General Description

Features

The MAX8895_ USB-compliant linear battery chargers

operate from either a USB port or dedicated charger with

automatic detection of adapter type and USB enumera-

tion capability. The MAX8895_ integrate the battery dis-

connect switch, current-sense circuit, MOSFET pass ele-

ments, and thermal regulation circuitry, and eliminate the

external reverse-blocking Schottky diode to create the

simplest and smallest stand-alone charging solutions.

S Enables Charging from a USB Port*

S Automatic Detection of Adapter Type

S Enumeration Capability Without Processor

Intervention

S USB Low-Speed Operation Without External

Crystal (MAX8895V/MAX8895W/MAX8895X)

S USB Full-Speed Operation Using an External

Crystal (MAX8895Y)

The MAX8895_ includes an automated detection of

charge adapter type, making it possible to distinguish

between USB 2.0 device, USB charger, and dedicated

charger devices. Furthermore, the MAX8895_ include a

USB enumeration function that automatically negotiates

with a USB host, making it possible to achieve the highest

current available from a USB 2.0 device or USB charger

without processor intervention. The adapter type detec-

tion is compliant with USB 2.0 specification as well as USB

charging Revision 1.1.

S Compliant with USB 2.0 Specification

S Compliant with USB Charging Specification

(Revision 1.1)

S Adaptive Input Current Limit for Dedicated

Charger

S Input Overvoltage Protection to 16V

S Automatic Current Sharing Between Battery

Charging and System

The MAX8895_ controls the charging sequence for single-

cell Li+ batteries from initial power-OK indication, through

prequalification, fast-charge, top-off, and finally charge

termination. Charging is controlled using constant cur-

rent, constant voltage, and constant die-temperature

(CCCVCTj) regulation for safe operation under all condi-

tions. The maximum charging current is adaptively con-

trolled by subtracting the system current from the input

current limit, ensuring that the charging current is always

maximized for any given operating condition.

S Smart Power SelectorK Allows Operation with

Discharged or No Battery

S NTC Monitoring of Battery Temperature

S No External MOSFETs Required

S Thermal Regulation Prevents Overheating

S 2µA Shutdown Current

S Tiny 2.36mm x 2.36mm, 25-Bump, 0.4mm Pitch

WLP Package

The MAX8895_ features optimized smart power control

to make the best use of limited USB or adapter power.

Battery charge current is set independently of the

SYS_ input current limit. Power not used by the system

charges the battery. Automatic input selection switches

the system from battery to external power. This allows

the application to operate without a battery, discharged

battery, or dead battery.

Applications

Bluetooth Headsets

Charging Cradles

Portable Devices

Other features include undervoltage lockout (UVLO),

overvoltage protection (OVP), charge status flag, charge

fault flag, power-OK monitor, battery thermistor monitor,

charge timer, and a 3.3V output.

Ordering Information and Typical Operating Circuit appear

at end of data sheet.

The MAX8895_ operates from a +4.0V to +6.6V sup-

ply and include overvoltage protection up to +16V. The

MAX8895_ is specified over the extended temperature

range (-40NC to +85NC) and are available in a compact

2.36mm x 2.36mm, 25-bump WLP package (0.4mm pitch).

Bluetooth is a registered trademark of Bluetooth SIG.

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

*Protected by US Patent #6,507,172.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-5205; Rev 4 9/12

12 3 4 5 6 7...45

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与MAX8895X相关器件

型号	品牌	获取价格	描述	数据表
MAX8895XEWA+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PBGA25, WLP-25
MAX8895Y	MAXIM	获取价格	Li-Ion Chargers with Smart Power Selector, Adapter Type Detection, and USB Enumeration
MAX8895YEWA+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PBGA25, WLP-25
MAX8896	MAXIM	获取价格	Dual PWM Step-Down Converter in a 2mm x 2mm Package for WCDMA PA and RF Power
MAX8896	ADI	获取价格	双通道PWM降压型转换器，采用2mm x 2mm封装，适用于WCDMA PA和RF电源
MAX8896EREE+T	MAXIM	获取价格	Dual PWM Step-Down Converter in a 2mm x 2mm Package for WCDMA PA and RF Power
MAX889RESA	MAXIM	获取价格	High-Frequency, Regulated, 200mA, Inverting Charge Pump
MAX889RESA+	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 2500kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,
MAX889RESA+T	MAXIM	获取价格	暂无描述
MAX889RESA-T	MAXIM	获取价格	Switched Capacitor Regulator, 0.2A, 2500kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 INCH,

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