Battery charger with constant voltage and current mode

A battery charger with both Constant Current (CC) and Constant Voltage (CV) modes is the standard for safely and efficiently charging.

Overview: CC-CV Battery Charging

✅ Stage 1: Constant Current (CC)

• Charger supplies a fixed current (e.g., 1 A).
• Battery voltage rises gradually.
• Continues until the battery reaches the target voltage (e.g., 4.2 V for a Li-ion cell).

✅ Stage 2: Constant Voltage (CV)

• Charger maintains a constant voltage.
• Charging current tapers down as battery gets full.
• Charging ends when current falls below a set threshold (e.g., C/20 or 100 mA).