Automatic switching circuit of voltage and current control mode

Published:2011/7/4 22:12:00 Author:Lucas | Keyword: Automatic , switching , control mode | From:SeekIC

Al and A2 form the voltage control mode, and Us is the load output voltage detection signal, A3 and A4 constitute the current control mode, and IS is the load current detection signal. The circuit can switch automatically according to the voltage and current detection signals. For example, in the voltage control range, the VD1 conduction, VT1 does not work. Then the output of A4 increases, if it reaches the base current level of VT2, the VT2 conduction, then the A4 is added negative feedback by VT2.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/Automatic_switching_circuit_of_voltage_and_current_control_mode.html

Print this Page | Comments | Reading(3)