MCP73113_13 datasheet(13/34 Pages) MICROCHIP

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DS22183D-page 13

MCP73113/4

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 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.

The VDD pin is rated 18V absolute maximum to prevent

sudden rise of input voltage from spikes or low-cost

AC-DC wall adapter.

3.2

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.

3.3

No Connect (NC)

No connect.

3.4

Battery Management 0V Reference

(VSS)

Connect to the negative terminal of the battery and

input supply.

3.5

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 5-2 for a summary of the status output during a

charge cycle.

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.

PROG pin is rated up to 5V with 6V absolute maximum

value.

The PROG pin also serves as a charge control enable

pin. Allowing the PROG pin to float or connecting the

pin to an impedance greater than 200 k

 will disable

the MCP73113/4 charger. Refer to Section 5.5

“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) to enhance thermal power dissipation.

Additional vias on the copper area under the

MCP73113/4 device will improve the performance of

heat dissipation and simplify the assembly process.

MCP73113/4

Symbol

I/O

Function

DFN-10

1, 2

VDD

Battery Management Input Supply

3, 4

VBAT

I/O

Battery Charge Control Output

5, 6

—

No Connection

STAT

Battery Charge Status Output

8, 9

VSS

—

Battery Management 0V Reference

PROG

I/O

Battery Charge Current Regulation Program and Charge Control Enable

—

Exposed Pad

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