+5V, 1.6A precision switching power supply circuit

Published:2011/7/12 21:19:00 Author:TaoXi | Keyword: +5V, 1.6A, precision, switching, power supply | From:SeekIC

The +5V, 1.6A precision switching power supply circuit is as shown in the figure. This circuit increases the photoelectric coupler (CNY75A) and the adjustable precision parallel regulator (TIA31). R3 is the current limiting resistor, R4 and R5 are the sampling resistor. When the Vo changes, the sampling resistor will compare with the 2.5V reference voltage of the TL431, so the electric potential of the K port changes to change the LED's operating current and the luminous intensity of the CNY75, then it adjusts the control port current of WSl57 through the optocoupler, so you can fine-tune the duty cycle to realize the purpose of precision voltage. The CNY75A has also played the electrical isolation effect.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/_5V_16A_precision_switching_power_supply_circuit.html

Print this Page | Comments | Reading(3)