(10) Buck step-down circuit simulation and engineering application examples
1. Simulation application examples
1.1 Case 1
Simulation technology requires input: input voltage 30~90V, output voltage 28V, maximum output current 10A, switching frequency 100KHz. We evaluate the circuit parameters according to the minimum input voltage of 30V under the parameter limit condition.
The simulation circuit configuration is as follows:
Input voltage: 30V;
switching frequency: 100kHz;
Q1 model: IRF1310; 42A, 100V; internal resistance 36mR;
D1 model: 12CGQ150: 150V, 35A, VD=1V;
output current 10A, load R=2.8R;
D=28/ 30=93%
estimated according to working mode