MCP73830_V01 datasheet(8/24 Pages) MICROCHIP

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MCP73830/L

DS20005049E-page 8

 2011-2019 Microchip Technology Inc.

3.0

PIN DESCRIPTION

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

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Battery Management 0V Reference

(VSS)

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

(VBAT)

Connect to the positive terminal of the battery. 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 (Typical) + 0.3V] to 6.0V is

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

3.5

Charge Enable (CE)

The MCP73830/L devices are 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

PROG to VSS during Constant-Current (CC) mode.

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 devices

can improve the performance of heat dissipation and

simplify the assembly process.

MCP73830/L

Symbol

I/O

Function

TDFN

1VSS

—

Battery management 0V reference.

STAT

Battery charge status output.

3VBAT

I/O

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

The pin is disconnected during Shutdown mode.

4VDD

Input power supply.

5CE

Charge enable pin. Pull the pin high to disable the device; it is internally

pulled down. Leave the pin floating if not used.

PROG

I/O

Battery charge current regulation program.

—

Exposed pad.

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