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MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide
DS50002321A-page 14
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2014 Microchip Technology Inc.
2.2.2 Connecting the Single-Cell Battery
A single-cell battery can be used to evaluate the board. In this case, the power deliv-
ered to the load will be about 4.2W.
The board can charge a single-cell battery with 1000 mA as the output current. Maximum
output voltage is set to 4.2V (Li-Ion specific) for the default software/hardware configura-
tion. The output voltage can be modified with minor software/hardware modifications.
FIGURE 2-1: Power Supply and Load Connection Diagram.
2.2.3 Powering the Board
Connect a power supply to J1 to power-up the MCP1632 Single-Cell Li-Ion Battery
Charger Demo Board. Ensure that the power supply has the (+) terminal connected to
J2 terminal block at pin 1 (up) and (–) terminal connected to pin 2 (down). The input
voltage source should be limited to the 4.5V to 12V range. Ensure that the chosen
power supply can provide enough current at the selected voltage to properly charge the
single-cell battery.
For 12V input voltage the current drain will be around 650 mA at full load (7W).
2.2.4 Using the Reference Board
The button is used to start or stop the battery charging.
Board is protected for the No-Load Condition. Typical value is +4.2 V
DC
for the
output voltage.
WARNING
This board does not have a Thermal Shut-Down function implemented. Please ensure
that the board load is properly cooled.
Note:
It is not recommended to operate the board without a proper load con-
nected to output. Maximum power at the output must be limited to 7W at
ambient temperature