Solar cell maximum power point tracking (MPPT) is to ensure that when the light intensity changes, the photovoltaic cell always outputs maximum power to make full use of solar energy. Under normal circumstances, a switching mode DC-DC converter needs to be used to implement the MPPT function to maximize the product of output voltage and charging current (output power). CN3722 uses switching step-down mode DC-DC conversion to achieve the maximum output of photovoltaic cells. Power point tracking function, its input voltage can reach up to 28V, which is very suitable for applications where the input voltage and battery voltage are very different.
1. High-end technology MPPT solar maximum power tracking charging management chip, with trickle current, constant current and constant voltage charging management
2. Use imported high-frequency low conduction internal resistance dual MOS tubes, high-current diodes, high-efficiency flat high-power inductors, and alloy current detection resistors.
3. Extra large aluminum heat sink at the bottom ensures stable operation for a long time under high current
4. High-speed and efficient charging method
5. Dual status indicator light. When the battery is not connected, the red light flashes and the green light is always on. When charging, the red light is on. When the battery is fully charged, it stops automatically and the green light is on at the same time.
Basic parameters:
Input voltage: nominal solar panel around 18V (no load solar panel around 21V)
Output voltage: nominal 12V (10.8 11.1V) full cut-off voltage 12.6V lithium battery 3-string lithium battery charging management
Output current: Maximum constant current 3A (please add heat dissipation if the charging current is greater than 2A)
Wiring method: Pad IN+ input positive pole, IN- input negative pole (SOLAR) BAT+ battery positive pole, BA- battery negative pole
