Showing posts with label switching. Show all posts
Showing posts with label switching. Show all posts
Tuesday, September 23, 2014
Switching Power Supply 13 8V 40A
Switching Power Supply 13 8V 40A
This power supply circuit produces 13.8V regulated to better than 1%, at a continuous load current of up to 40A. It has current limiting, making it appropriate for direct connection to a 12V backup battery. If the current limit potentiometer is turned up, the power supply can deliver up to 60A on an intermittent basis, while maintaining regulation. No minimum load is required. The ripple on the output is about 20mV, and the efficiency is 88%.
More Switching Power Supply
Saturday, September 6, 2014
High current output switching power supply
This is low voltage high-current ouput , switching dc power supplly wiht input 220 Volts AC , In this circuit , an St2 diac relaxation oscilator, Q3 , C1 , and the diac , initiates conduction of the output switching transistor Q1, the on time of which is maintained constant by a separate timing / commutation network consisting of Q2 , C2 ,SUS , and SCR 1. See schmeatic diagram below :
The output voltage , consequently , is independent on the duty cycle . To compensate for unwanted variations of output voltage because of input voltage or load resistance fluctuations , an H11C wired as a liniear - model unilateral pnp transistor in a stable different amplifier configuration is connected into the galvanically isolated negative- feedback loop.
Subscribe to:
Posts (Atom)