MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide
DS51812B-page 14
©
2009 Microchip Technology Inc.
FIGURE 2-3:
MCP73871 Top Board and Application Circuit.
Resistive Load
or
E-Load
5V DC
Power Supply
min 2A
Battery or
Battery
Emulation
Circuit
TABLE 2-1:
MCP73871 CHARGE STATUS OUTPUTS
Charge Cycle State
STAT1 (Green)
STAT2 (Red)
PG (Blue)
Shutdown
OFF
OFF
OFF
Standby
OFF
OFF
ON
Charge in Progress
ON
OFF
ON
Charge Complete (EOC)
OFF
ON
ON
Temperature Fault
ON
ON
ON
Timer Fault
ON
ON
ON
Low Battery Indicator (LBO)
ON
OFF
OFF
No Battery Present
OFF
OFF
ON
No Input Power
OFF
OFF
OFF
Note:
LED Status Outputs are given for the battery connected at V
BAT
and GND.
TABLE 2-2:
MCP73871 DEMO BOARD DIP SWITCH CONFIGURATION
Switch # / Name
State / Function
Observations
OFF
ON
1 / SEL
AC-DC Adapter
Power from USB
—
2 / PROG2
USB maximum 500 mA
USB max 100 mA
Only if SEL is ON
3 / TE
Timer Enable OFF
Timer Enable activated
Factory preset at 4h, 6h and 8h
4 / CE
Charge is enabled
Charge function OFF
CE = Chip Enable
