MCP73828 datasheet(14/24 Pages) MICROCHIP

Part #	MCP73828

Description	Single Cell Lithium-Ion Charge Management Controller with Charge Complete Indicator and Temperature Monitor

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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14 / 24 page

MCP73828

DS21706A-page 14

 2002 Microchip Technology Inc.

6.1.1.7

CHARGE COMPLETE INTERFACE

The charge complete indicator, CD10, can be utilized to

illuminate an LED when the MCP73828 is charging the

battery. When the MCP73828 is in constant voltage

mode and the charge current has diminished below

10% of IOUT(PEAK), the CD10 pin will transition to a high

impedance state. A current limit resistor should be

used in series with the LED to establish a nominal LED

bias current of 10 mA. The maximum allowable sink

current of the CD10 pin is 30 mA.

6.2

PCB Layout Issues

For optimum voltage regulation, place the battery pack

as close as possible to the device’s VOUT and GND

pins. It is recommended to minimize voltage drops

along the high current carrying PCB traces.

If the PCB layout is used as a heatsink, adding many

vias around the external pass transistor can help con-

duct more heat to the back-plane of the PCB, thus

reducing the maximum junction temperature.

MCP73828 Datasheet(PDF) 14 Page - Microchip Technology