2results about How to "Large load current" patented technology

The utility model discloses a bypass diode circuit component with temperature protection for parallel connection with photovoltaic cell component, and the photovoltaic cell component includes a plurality of mutually series connection's photovoltaic cell group, and the bypass diode circuit component with temperature protection includes substrate, thermosensitive device and a plurality of bypass diode for parallel connection in photovoltaic cell group both ends, thermosensitive device and a plurality of bypass diode set up in substrate, and thermosensitive device is close to a plurality of bypass diode setting, bypass diode anode is used for connecting the negative pole of parallel connection's photovoltaic cell group, and bypass diode cathode is used for connecting the positive pole of parallel connection's photovoltaic cell group, and thermosensitive device sets up in the loop of bypass diode and load constitution, and thermosensitive device has the resistance value of positive temperature coefficient, when temperature rises to threshold value, thermosensitive device disconnects, and when temperature drops to recovery threshold value, thermosensitive device reconducts. The utility model can avoid that photovoltaic cell component and bypass diode burn because of the continuous high temperature.

This utility model provides a low-current startup system for an MCU, relating to the field of electrical equipment technology. It includes: a constant-current buck converter circuit, an LDO startup circuit, and an MCU load. The constant-current buck converter circuit includes an input power supply, a first resistor, a second resistor, a third resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first Zener diode, a second Zener diode, a first NPN transistor, a third NPN transistor, a PNP transistor, a second capacitor, and a fourth capacitor. The LDO startup circuit includes a third Zener diode and a low-dropout linear regulator. The negative terminals of the second and third Zener diodes are connected. The low-dropout linear regulator is connected to the MCU load, providing an output voltage to the MCU load. By precisely controlling the current and voltage, reliable startup and stable operation of the MCU under low-current conditions are achieved.