MCP73831T-2ACI/OT Datasheet_PDF文件下载_芯片资料查询

MCP73831/2

Miniature Single-Cell, Fully Integrated Li-Ion,

Li-Polymer Charge Management Controllers

Features:

鈥?Linear Charge Management Controller:

- Integrated Pass Transistor

- Integrated Current Sense

- Reverse Discharge Protection

鈥?High Accuracy Preset Voltage Regulation: + 0.75%

鈥?Four Voltage Regulation Options:

- 4.20V, 4.35V, 4.40V, 4.50V

鈥?Programmable Charge Current

鈥?Selectable Preconditioning

鈥?Selectable End-of-Charge Control

鈥?Charge Status Output

- Tri-State Output - MCP73831

- Open-Drain Output - MCP73832

鈥?Automatic Power-Down

鈥?Thermal Regulation

鈥?Temperature Range: -40掳C to +85掳C

鈥?Packaging:

- 8-Lead, 2 mm x 3 mm DFN

- 5-Lead, SOT23

Description:

The MCP73831/2 devices are highly advanced linear

charge management controllers for use in space-lim-

ited, cost-sensitive applications. The MCP73831/2 are

available in an 8-Lead, 2 mm x 3 mm DFN package or

a 5-Lead, SOT23 package. Along with their small

physical size, the low number of external components

required make the MCP73831/2 ideally suited for por-

table applications. For applications charging from a

USB port, the MCP73831/2 adhere to all the

specifications governing the USB power bus.

The MCP73831/2 employ a constant-current/constant-

voltage charge algorithm with selectable precondition-

ing and charge termination. The constant voltage

regulation is fixed with four available options: 4.20V,

4.35V, 4.40V or 4.50V, to accommodate new, emerg-

ing battery charging requirements. The constant cur-

rent value is set with one external resistor. The

MCP73831/2 devices limit 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.

Several options are available for the preconditioning

threshold, preconditioning current value, charge termi-

nation value and automatic recharge threshold. The

preconditioning value and charge termination value

are set as a ratio, or percentage, of the programmed

constant current value. Preconditioning can be dis-

abled. Refer to

Section 1.0 鈥淓lectrical Characteris-

tics鈥?/span>

for available options and the

鈥淧roduct

Identification System鈥?/div>

for standard options.

The MCP73831/2 devices are fully specified over the

ambient temperature range of -40掳C to +85掳C.

Applications:

鈥?/div>

Lithium-Ion/Lithium-Polymer Battery Chargers

Personal Data Assistants

Cellular Telephones

Digital Cameras

MP3 Players

Bluetooth Headsets

USB Chargers

Typical Application

500 mA Li-Ion Battery Charger

V

IN

4.7

渭F

4 V

DD

V

BAT

3

4.7

渭F

PROG

470惟

1

STAT

V

SS

2

5

2 k惟

Package Types

8-Lead DFN

(2 mm x 3 mm)

V

DD

1

V

DD

2

4 V

DD

V

BAT

3

V

BAT

4

8 PROG

7 NC

6 V

SS

5 STAT

SOT23-5

+ Single

Li-Ion

- Cell

STAT 1

V

SS

2

V

BAT

3

5 PROG

MCP73831

漏

2006 Microchip Technology Inc.

DS21984B-page 1

制造商
Microchip
产品种类
电池管理
电池类型
Li-Ion, Li-Poly
输出电压
4.2 V
输出电流
15 mA to 500 mA
工作电源电压
3.75 V to 6 V
最大工作温度
+ 85 C
最小工作温度
- 40 C
封装 / 箱体
SOT-23
封装
Reel
安装风格
SMD/SMT
工厂包装数量
3000

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