MCP73853_13 datasheet(17/32 Pages) MICROCHIP

tên linh kiện	MCP73853

Giải thích chi tiết về linh kiện	USB Compatible Li-Ion/Li-Polymer Charge Management Controllers

PDF	32 Pages

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nhà sản xuất	MICROCHIP [Microchip Technology]

Trang chủ	http://www.microchip.com

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 2004-2013 Microchip Technology Inc.

DS21915C-page 17

MCP73853/55

6.0

APPLICATIONS

The MCP7385X devices are designed to operate in

conjunction with a host microcontroller or in stand-

alone applications. The MCP7385X devices provide

the preferred charge algorithm for Li-Ion/Li-Polymer

cells. The algorithm uses a constant current followed

by a constant voltage charging method. Figure 6-1

depicts a typical stand-alone application circuit, while

Figure 6-2 and Figure 6-3 depict the accompanying

charge profile.

FIGURE 6-1:

Typical Application Circuit.

FIGURE 6-2:

Typical Charge Profile.

STAT1

VSET

VSS3

VDD1

VDD2

VSS2

TIMER

PROG

VBAT3

VBAT2

VBAT1

CTIMER

RPROG

RT1

RT2

Single

Lithium-Ion

Cell

VSS1

MCP73853

5678

Regulated Wall Cube

USB Power Bus

Regulation

Voltage

(VREG)

Regulation

Current

(IREG)

Transition

Threshold

(VPTH)

Precondition

Current

(IPREG)

Precondition

Safety Timer

Fast Charge

Safety Timer

Elapsed Time

Termination Timer

Charge

Voltage

Preconditioning

Mode

Constant-current

Mode

Constant-voltage

Mode

Charge

Current

Termination

Current

(ITERM)

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