Principle of DC Power Supply Voltage Adjustment Module
DC power supply is an indispensable equipment in the power supply industry, such as the switching power supply industry, it is used to test the output voltage range of the switching power supply and finally confirm the specifications.
DC power supply plays a pivotal role in power supply classification, so what is the module principle of DC power supply voltage adjustment?
In the DC power supply voltage adjustment module, the adjustment tube is composed of field effect transistors to achieve high current output. Since the design requires Iomax=5 A, Iomin=0 A, Pm=(Vimax-Vomin)Iomax=(30×5)=150 W, therefore, the adjustment tube in this circuit can choose TL431.
The comparison and amplification of the circuit adopts the operational amplifier OP07, the CPU controls the output voltage through the DAC, and then the sampling circuit composed of R9, R10, and RP conducts voltage sampling.
The negative feedback circuit composed of FET, OP07, LM324 and sampling circuit can realize the purpose of adjusting the output voltage (stabilizing).
