User manual

MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
DS51992A-page 12 © 2011 Microchip Technology Inc.
1.3 GETTING STARTED
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board is fully assembled
and tested for charging a single-cell Li-Ion or Li-Polymer battery with an input supply of
3.75V to 6V.
1.3.1 Power Input and Output Connection
1.3.1.1 POWERING THE MCP73830L 2X2 TDFN LI-ION BATTERY CHARGER
EVALUATION BOARD
1. Connect the positive battery terminal to V
BAT
and negative battery terminal to
GND.
2. Connect the DC power supply Negative terminal to GND.
3. Connect the 5V DC power supply Positive terminal to V
IN
.
4. It should initiate the battery charging cycle when the power source is present.
5. Charging current should be able to read off the multi-meter that is in series with
battery.
6. Pulling EN pin high disables charging activities.
7. Fast Charge Current can be programmed with various resistors that are based
on Figure 1-1.
FIGURE 1-1: Resistor vs. Charge Current.
Note: The battery voltage needs to be below 4.05V (typical) in order to initiate a
new charging cycle.
Note: The battery can be replaced with test circuit or electronic load that can sync
current with the DC power supply.
0
20
40
60
80
100
120
140
160
180
200
13579111315
ProgrammingResistor(k)
ChargeCurrent(mA)