MCP73811 查看數據表（PDF） - Microchip Technology

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MCP73811

Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers

Microchip Technology 

MCP73811/2

3.0 PIN DESCRIPTION

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1: PIN FUNCTION TABLES

Pin Number

SOT-23-5

1

2

3

4

5

Symbol

CE

VSS

VBAT

VDD

PROG

Function

Active High Charge Enable

Battery Management 0V Reference

Battery Charge Control Output

Battery Management Input Supply

Current Regulation Set and Charge Control Enable

3.1 Charge Enable Input (CE)

A logic High enables battery charging. A logic Low

disables battery charging. The charge enable input is

compatible with 1.8V logic.

3.2 Battery Management 0V Reference

(VSS)

Connect to negative terminal of battery and input

supply.

3.3 Battery Charge Control Output

(VBAT)

Connect to positive terminal of battery. Drain terminal

of internal P-channel MOSFET pass transistor. Bypass

to VSS with a minimum of 1 µF to ensure loop stability

when the battery is disconnected.

3.4 Battery Management Input Supply

(VDD)

A supply voltage of [VREG (typ.) + 0.3V] to 6V is

recommended. Bypass to VSS with a minimum of 1 µF.

3.5 Current Regulation Set (PROG)

For the MCP73811, the current regulation set input

(PROG) functions as a digital input selection. A logic

Low selects a 85 mA charge current; a logic High

selects a 450 mA charge current.

For the MCP73812, the charge current is set by placing

a resistor from PROG to VSS.

© 2007 Microchip Technology Inc.

DS22036A-page 9

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