Other
DC-DC Controller Current Mode and Voltage Mode Difference:
Voltage mode: There is only one voltage feedback loop. The PWM is changed after the voltage signal is converted. The dynamic response is poor, and a larger filter capacitor is needed. The system has no built-in current limiting protection function, part of which may be external, and does not participate in system feedback.
Current mode: fast dynamic response, good stability, real inductance current soft start, accurate and fast current feedback, easy to achieve current sharing; easy feedback design; relatively low capacitance requirements; this mode takes inductance current signal as the feedback inner loop, plus voltage feedback as the outer loop of double loop control.
MPPT function: The module has the function of input voltage limitation, that is, after setting the maximum power point voltage of solar energy, as long as the voltage is lower than this value, the module will reduce the output current, reduce the output power, and ensure the input voltage is stable at the set value. For example, the maximum power point voltage of solar cells is 34V. First, the input voltage is adjusted to 34V, and the input voltage potentiometer is adjusted counterclockwise until the module has no output. At this time, the maximum input voltage of the module is 34V.
Compared with the solar controller without MPPT function, the energy utilization of this module is still much higher, at least under the maximum illumination conditions.
Mode Selection: This module provides mode selection, which can be selected in jump mode, discontinuous mode and forced continuous mode.