Installation and Operation
©
2006 Microchip Technology Inc.
DS51626A-page 9
load will not work for preconditioning and fast charge currents. The best way to
evaluate the charge management circuit is to use a single cell Li-Ion battery
pack, or the recommended simulated battery load. Refer to
FIGURE 2-2:
Simulated Battery Load.
2.3.1.3
SETTING THE FAST CHARGE CURRENT
1. As provided, the MCP73833 Li-Ion Battery Charger Evaluation Board has a fast
charge current setting of 1A for the installed device.
2. Alternatively, for the installed device, resistors R5 and R6 can be changed in
order to obtain the desired fast charge current. In addition, the PROG via can be
interfaced to obtain two current settings or to utilize the PROG device enable
feature. Refer to the MCP73833/4 data sheet for choosing the appropriate value
programming resistor for the desired fast charge current.
2.3.1.4
STATUS INDICATORS
1. The MCP73833 Li-Ion Battery Charger Evaluation Board has three LED status
indicators for each circuit being evaluated.
represents the state of the
status indicators during various states of the charge cycle. ON indicates that the
respective LED is illuminated.
2.3.1.5
BATTERY TEMPERATURE MONITOR
1. As provided, the installed circuit of the MCP73833 Li-Ion Battery Charger Evalu-
ation Board has the battery temperature monitor disabled. To invoke battery
temperature monitoring, an appropriate thermistor should be connected between
the THERM via and VSS via. In addition, resistors R2 and R7 should be changed
in order to obtain the desired charge inhibit window. Refer to the MCP73833/4
data sheet for choosing the appropriate resistor values.charge current monitor
for each circuit being evaluated.
TABLE 2-1:
STATUS INDICATORS
CHARGE CYCLE STATE
STAT1 (RED)
STAT2 (GREEN)
PG (GREEN)
Shutdown
OFF
OFF
OFF
Standby
OFF
OFF
ON
Charge in Progress
ON
OFF
ON
Charge Complete (EOC)
OFF
ON
ON
Temperature Fault
OFF
OFF
ON
Timer Fault
OFF
OFF
ON
System Test Mode
ON
ON
ON
+
5
Ω
Variable
Power Supply
0V - 6V
1,000 µF
10V Al
B+
10 W
B-
+
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