40V to 30VDC-DC converter circuit.
Works like a common series type switching power supply. Field tube conduction, 40V through the field tube and then through the inductor to the capacitor below the charge, the voltage on the capacitor rises to 30V, the field tube cutoff, when the voltage is lower than 30V, the field tube and conduction, and so on, so that the capacitor on the voltage is always maintained at 30V.
Main application: switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, Industrial control equipment, communication equipment, electric power equipment, instruments, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD monitors, LED lamps and lanterns, communication equipment, audio-visual products, security monitoring, LED light strip, computer chassis, digital products and instruments and other fields.
Expanded Information:
Switching power supplies generally have three modes of operation:
Fixed frequency and pulse width mode, fixed frequency and variable pulse width mode, and variable frequency and pulse width mode. The former mode is mostly used for DC/AC inverter power supply, or DC/DC voltage conversion; the latter two modes are mostly used for switching regulator power supply.
In addition, the switching power supply output voltage also has three working modes: direct output voltage mode, average output voltage mode, amplitude output voltage mode. Similarly, the former mode of operation is mostly used for DC/AC inverter power supply, or DC/DC voltage conversion; the latter two modes of operation are mostly used for switching regulated power supply.
Baidu Encyclopedia-Switching Power Supply