Datasheet > MCP73871

MCP73871

更新时间： 2024-11-21 12:19:39

品牌	Logo	应用领域
美国微芯 - MICROCHIP		电池控制器
页数	文件大小	规格书
38页	670K
描述
Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controller

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MCP73871 数据手册

MCP73871

Stand-Alone System Load Sharing and Li-Ion / Li-Polymer

Battery Charge Management Controller

Features

Applications

• Integrated System Load Sharing and Battery

Charge Management

• GPSs / Navigators

• PDAs and Smart Phones

• Portable Media Players and MP3 Players

• Digital Cameras

- Simultaneously Power the System and

Charge the Li-Ion Battery

- Voltage Proportional Current Control (VPCC)

ensures system load has priority over Li-Ion

battery charge current

• Bluetooth Headsets

• Portable Medical Devices

• Charge Cradles / Docking Stations

• Toys

- Low-Loss Power-Path Management with

Ideal Diode Operation

• Complete Linear Charge Management Controller

- Integrated Pass Transistors

Description

- Integrated Current Sense

The MCP73871 device is a fully integrated linear

solution for system load sharing and Li-Ion / Li-Polymer

battery charge management with ac-dc wall adapter

and USB port power sources selection. It’s also

capable of autonomous power source selection

between input or battery. Along with its small physical

size, the low number of required external components

makes the device ideally suited for portable

applications.

- Integrated Reverse Discharge Protection

- Selectable Input Power Sources: USB Port or

AC-DC Wall Adapter

• Preset High Accuracy Charge Voltage Options:

- 4.10V, 4.20V, 4.35V or 4.40V

- ±0.5% Regulation Tolerance

• Constant Current / Constant Voltage (CC/CV)

Operation with Thermal Regulation

The MCP73871 device automatically obtains power for

the system load from a single-cell Li-Ion battery or an

input power source (ac-dc wall adapter or USB port).

The MCP73871 device specifically adheres to the

current drawn limits governed by the USB specification.

With an ac-dc wall adapter providing power to the

system, an external resistor sets the magnitude of 1A

maximum charge current while supports up to 1.8A

total current for system load and battery charge

current.

• Maximum 1.8A Total Input Current Control

• Resistor Programmable Fast Charge Current

Control: 50 mA to 1A

• Resistor Programmable Termination Set Point

• Selectable USB Input Current Control

- Absolute Maximum: 100 mA (L) / 500 mA (H)

• Automatic Recharge

• Automatic End-of-Charge Control

• Safety Timer With Timer Enable/Disable Control

• 0.1C Preconditioning for Deeply Depleted Cells

• Battery Cell Temperature Monitor

The MCP73871 device employs a constant current /

constant voltage (CC/CV) charge algorithm with

selectable charge termination point. The constant

voltage regulation is fixed with four available options:

4.10V, 4.20V, 4.35V, or 4.40V to accommodate new,

emerging battery charging requirements. The

MCP73871 device also limits the charge current based

on die temperature during high power or high ambient

conditions. This thermal regulation optimizes the

charge cycle time while maintaining device reliability.

• Undervoltage Lockout (UVLO)

• Low Battery Status Indicator (LBO)

• Power-Good Status Indicator (PG)

• Charge Status and Fault Condition Indicators

• Numerous Selectable Options Available for a

Variety of Applications:

- Refer to Section 1.0 “Electrical

The MCP73871 device includes a low battery indicator,

Characteristics” for Selectable Options”

power-good indicator and two charge status

indicators that allows for outputs with LEDs or

communication with host microcontrollers. The

MCP73871 device is fully specified over the ambient

temperature range of -40°C to +85°C.

- Refer to the “Product Identification

System” for Standard Options

• Temperature Range: -40°C to +85°C

• Packaging: 20-Lead QFN (4 mm x 4 mm)

DS22090B-page 1

12 3 4 5 6 7...38

中文翻译

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与MCP73871相关器件

型号	品牌	获取价格	描述	数据表
MCP73871-1AAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-1CAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-1CCI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-2AAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-2CAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-2CCI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-3CAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-3CCI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-4CAI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll
MCP73871-4CCI/ML	MICROCHIP	获取价格	Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controll

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