MCP73830/L

DS20005049D-page 8

 2011-2014 Microchip Technology Inc.

3.0

PIN DESCRIPTION

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

TABLE 3-1:

PIN FUNCTION TABLES

3.1

Battery Management 0V Reference

Connect to the negative terminal of the battery and

input supply.

3.2

Status Output (STAT)

STAT is an open-drain logic output for connection to an

LED for charge status indication in stand-alone

applications. Alternatively, a pull-up resistor can be

applied for interfacing to a host microcontroller. Refer to

Table 5-1 for a summary of the status output during a

charge cycle.

3.3

Battery Charge Control Output

Connect to the positive terminal of the battery. Bypass

when the battery is disconnected.

3.4

Battery Management Input Supply

3.5

Charge Enable (CE)

The MCP73830/L is always enabled with an internal

pull-down resistor. Pulling the CE pin high will enter

Standby mode.

3.6

Current Regulation Set (PROG)

The fast charge current is set by placing a resistor from

Refer to Section 5.4 “Constant Current Mode – Fast

Charge” for details.

3.7

Exposed Pad (EP)

The Exposed Thermal Pad (EP) should be connected

to the exposed copper area on the Printed Circuit

Board (PCB) for thermal enhancement purposes.

Additional vias on the copper area under the

MCP73830/L device can improve the performance of

heat dissipation and simplify the assembly process.

MCP73830/L

Symbol

I/O

Function

TDFN

—

Battery management 0V reference.

2

STAT

O

Battery charge status output.

I/O

Charge control output. Regulates the charge current and battery voltage.

The pin is disconnected during Shutdown mode.

I

Input power supply.

5CE

I

Charge Enable pin. Pull the pin high to disable the device. It is internally

pulled down. Leave the pin float if not used.

6

PROG

I/O

Battery charge current regulation program.

7

EP

—

Exposed pad.