MCP73838-G8I/UN View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MCP73838-G8I/UN

Advanced Stand-Alone Li-Ion / Li-Polymer Battery Charge Management Controller with Autonomous AC-Adapter or USB-Port Source Selection

Microchip Technology 

MCP73837/8

4.0 DEVICE OVERVIEW

The MCP73837/8 devices are simple, yet fully integrated linear charge management controllers. Figure 4-1 depicts the

operational flow algorithm.

SYSTEM TEST (LDO) MODE

VTHERM > (VDD -100 mV)

STAT1 = LOW

STAT2 = LOW

PG = LOW

Timer Suspended

TEMPERATURE FAULT

No Charge Current

STAT1 = Hi-Z

STAT2 = Hi-Z

PG = LOW

Timer Suspended

SHUTDOWN MODE*

VDD < VBAT -100 mV

VDD < VSTOP

STAT1 = Hi-Z

STAT2 = Hi-Z

PG = Hi-Z

* Continuously Monitored

STANDBY MODE *

VBAT > (VREG +100 mV)

PROG > 200kΩ

STAT1 = Hi-Z

STAT2 = Hi-Z

PG = LOW

VBAT < VPTH

PRECONDITIONING MODE

Charge Current = IPREG

STAT1 = LOW

STAT2 = Hi-Z

PG = LOW

Timer Reset

V >V

BAT PTH

FAST CHARGE MODE

Charge Current = IREG

STAT1 = LOW

STAT2 = Hi-Z

PG = LOW

Timer Enabled

VBAT = VREG

CONSTANT VOLTAGE MODE

Charge Voltage = VREG

STAT1 = LOW

STAT2 = Hi-Z

PG = LOW

IBAT < ITERM

Timer Expired

CHARGE COMPLETE MODE

No Charge Current

STAT1 = Hi-Z

STAT2 = LOW

PG = LOW

VBAT> VPTH

Timer Expired

VBAT< VRTH

TIMER FAULT

No Charge Current

STAT1 = Hi-Z

STAT2 = Hi-Z

PG = LOW

Timer Suspended

FIGURE 4-1:

Flow Chart.

© 2007 Microchip Technology Inc.

DS22071A-page 15

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