Datasheet

Table Of Contents

MCP1631HV Digitally Controlled Programmable Current Source Reference Design

2.3.1.5.3 How the MCP1631HV Digitally Controlled Programmable Current Source

Reference Design Operates in Charger Mode

Follow the instructions in Section 2.3.1.5.1 “How to Connect and Charge a Battery

with the MCP1631HV Digitally Controlled Programmable Current Source

Reference Design” to connect a battery pack at the board. In the Standby (OFF) state,

the GREEN LED will be lit. Push the S1 button to start the charge profile and turn on

the output. The GREEN LED will flash.

If any fault conditions are detected during charging, the RED LED will flash and the

output will automatically turn off. See Table 2-1 to identify the nature of the fault. When

a charge cycle successfully completes, the GREEN LED will be turned ON and the

output will be turned off. The system will stay in a Standby (OFF) state until the next

button push.

At any moment, the charging can be stopped by pressing and holding the push button

until the RED LED turns on.

The default calibration value for the Li-Ion pack is 4.2V. For better accuracy, the output

voltage should be calibrated before starting a charge cycle. See

Section 2.3.1.5.4 “Calibrating the Output Voltage for the Li-Ion Chemistry Profile”

for instructions.

2.3.1.5.4 Calibrating the Output Voltage for the Li-Ion Chemistry Profile

Prior to the first Li-Ion charging cycle, it is recommended to calibrate the charger

termination voltage for better accuracy. Connect a 12V

power supply to the J1

connector. Select another power supply for the calibration voltage and set it to the

desired termination voltage between 3.9V and 4.20V. Connect the calibration power

supply to the J2 connector. Connect the positive lead to J2-1 and the negative lead to

J2-5.

1. Press S1 to turn on the board.

2. Wait for the GREEN LED to light. If it does not light, check for faults.

3. When the GREEN LED is lit, press and hold down S1 for 2 seconds until the

YELLOW LED (both green and red LEDs) is lit. The YELLOW status indicator

signals the calibration is complete.

4. The calibration power supply can now be removed from the J2 output connector.