MCP73826(2002) データシートの表示（PDF） - Microchip Technology

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MCP73826
(Rev.:2002)

Single Cell Lithium-Ion Charge Management Controller

Microchip Technology 

MCP73826

3.0 PIN DESCRIPTION

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

Pin

Name

Description

1

SHDN Logic Shutdown

2

GND Battery Management

0V Reference

3

VBAT

Cell Voltage Monitor Input

4

VDRV Drive Output

5

VIN

Battery Management

Input Supply

6

VSNS Charge Current Sense Input

TABLE 3-1: Pin Function Table.

3.1 Logic Shutdown (SHDN)

Input to force charge termination, initiate charge, or ini-

tiate recharge.

3.2 Battery Management 0V Reference

(GND)

Connect to negative terminal of battery.

3.3 Cell Voltage Monitor Input (VBAT)

Voltage sense input. Connect to positive terminal of

battery. Bypass to GND with a minimum of 10 µF to

ensure loop stability when the battery is disconnected.

A precision internal resistor divider regulates the final

voltage on this pin to VREG.

3.4 Drive Output (VDRV)

Direct output drive of an external P-channel MOSFET

pass transistor for current and voltage regulation.

3.5 Battery Management Input Supply

(VIN)

A supply voltage of 4.5V to 5.5V is recommended.

Bypass to GND with a minimum of 10 µF.

3.6 Charge Current Sense Input (VSNS)

Charge current is sensed via the voltage developed

across an external precision sense resistor. The sense

resistor must be placed between the supply voltage

(VIN) and the source of the external pass transistor. A

50 mΩ sense resistor produces a fast charge current of

1 A, typically.

DS21705A-page 8

 2002 Microchip Technology Inc.

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