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MCP73871-2CCI/ML Datasheet(PDF) 19 Page - Microchip Technology

Part # MCP73871-2CCI/ML
Description  Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controller
PDF  38 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP73871-2CCI/ML Datasheet(HTML) 19 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS22090B-page 19
MCP73871
4.0
DEVICE OVERVIEW
The MCP73871 device is a simple, but fully integrated
linear charge management controllers with system
load
sharing
feature.
Figure 4-1
depicts
the
operational flow algorithm.
FIGURE 4-1:
MCP73871 Device Flow Chart.
SHUTDOWN MODE *
VDD < VUVLO
VDD < VBAT
STAT1 = Hi-Z
STAT2 = Hi-Z
PG = Hi-Z
PRECONDITIONING MODE
Charge Current = IPREG
STAT1 = LOW
STAT2 = Hi-Z
PG = LOW
Timer Reset
CONSTANT VOLTAGE MODE
Charge Voltage = VREG
STAT1 = LOW
PG = LOW
VBAT > VPTH
CHARGE COMPLETE MODE
No Charge Current
STAT1 = Hi-Z
STAT2 = LOW
PG = LOW
Timer Reset
IBAT < ITERM
Timer Expired
VBAT < VPTH
STANDBY MODE *
VBAT > (VREG +100 mV)
CE = LOW
STAT1 = Hi-Z
STAT2 = Hi-Z
PG = LOW
* Continuously Monitored
TEMPERATURE FAULT
No Charge Current
STAT1 = LOW
STAT2 = LOW
PG = LOW
Timer Suspended
TIMER FAULT
No Charge Current
STAT1 = LOW
STAT2 = LOW
PG = LOW
Timer Expired
LBO *
VIN < VBAT
STAT1 = LOW
STAT2 = Hi-Z
PG = Hi-Z
VBAT > VPTH
STAT2 = Hi-Z
Timer Reset
FAST CHARGE MODE
Charge Current = IREG
STAT1 = LOW
STAT2 = Hi-Z
PG = LOW
Timer Enabled



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