Boost Converter Example¶

Overview¶

The boost converter is the fundamental step-up DC-DC topology, producing output voltage higher than input.

Difficulty: Beginner

Estimated Time: 15-20 minutes

Learning Objectives¶

Understand boost converter operation
Observe energy storage in inductor
Verify Vout = Vin/(1-D) relationship

Circuit Description¶

    +Vin ──[L]──┬──[D]──┬── +Vout
                │       │
               [S]     [C]     [R]
                │       │       │
    GND ────────┴───────┴───────┴── GND

Parameters¶

Parameter	Value	Unit
Vin	12	V
Vout	24	V
D (duty cycle)	0.5	-
fs	100	kHz
L	50	μH
C	100	μF
R (load)	24	Ω

Expected Results¶

Signal	Value
Vout (avg)	24 V
IL (avg)	2 A
Iout (avg)	1 A
ΔVout	~0.5 V p-p

Key Insight¶

Input current (IL) = Output current / (1-D)

At D=0.5: IL = Iout / 0.5 = 2 × Iout

Exercises¶

Vary D from 0.3 to 0.7, verify Vout = Vin/(1-D)
Observe efficiency drop at high D (>0.8)
Compare input vs output current