Boost Converter Example

Here is an example of a boost converter circuit configured for SPICE simulation. It uses one voltage source (V2) with a square wave to drive a MOSFET, boosting the voltage from a 5V DC source (V1) to a higher level. Voltage probes are placed at the input and output to observe the results.

export default () => (
    <board width={30} height={30} schMaxTraceDistance={5}>
      <voltagesource
        name="V1"
        voltage={"5V"}
        schY={2}
        schX={-5}
        schRotation={270}
      />
      <trace from={".V1 > .pin1"} to={".L1 > .pin1"} />
      <trace from={".L1 > .pin2"} to={".D1 > .anode"} />
      <trace from={".D1 > .cathode"} to={".C1 > .pin1"} />
      <trace from={".D1 > .cathode"} to={".R1 > .pin1"} />
      <trace from={".C1 > .pin2"} to={".R1 > .pin2"} />
      <trace from={".R1 > .pin2"} to={".V1 > .pin2"} />
      <trace from={".L1 > .pin2"} to={".M1 > .drain"} />
      <trace from={".M1 > .source"} to={".V1 > .pin2"} />
      <trace from={".M1 > .source"} to={"net.GND"} />
      <trace from={".M1 > .gate"} to={".V2 > .pin1"} />
      <trace from={".V2 > .pin2"} to={".V1 > .pin2"} />
      <inductor 
        footprint={"0603"} 
        name="L1" 
        inductance={"1mH"} 
        schY={3} 
        schX={-1} 
        pcbY={3} 
      />
      <diode
        name="D1"
        footprint={"0603"}
        schY={3}
        schX={2.1}
        pcbY={6}
        pcbX={3}
      />
      <capacitor
        polarized
        schRotation={270}
        name="C1"
        capacitance={"10uF"}
        footprint={"0603"}
        schX={3}
        pcbX={3}
      />
      <resistor
        schRotation={270}
        name="R1"
        resistance={"1k"}
        footprint={"0603"}
        schX={6}
        pcbX={9}
      />
      <voltagesource
        name="V2"
        voltage={"10V"}
        waveShape="square"
        dutyCycle={0.68}
        frequency={"1kHz"}
        schX={-3}
        schRotation={270}
      />
      <mosfet
        channelType="n"
        footprint={"sot23"}
        name="M1"
        mosfetMode="enhancement"
        pcbX={-4}
      />
      <voltageprobe connectsTo={".V1 > .pin1"} />
      <voltageprobe connectsTo={".R1 > .pin1"} />

      <analogsimulation
        duration={100}
        timePerStep={1}
        spiceEngine="ngspice"
      />
    </board>
)

The simulation results would show the output voltage across R1 successfully "boosted" compared to the 5V input from V1. The specific output voltage depends on the duty cycle of the MOSFET driver V2 and the component values.