Optimize your power electronics design with our Inverting Buck-Boost Converter Calculator. Quickly determine crucial parameters like duty cycle, inductor value, and capacitor size for efficient DC-DC voltage conversion. Achieve stable negative output voltages with precision and simplify complex calculations for your projects.
Formula:
The inverting buck-boost converter is a DC-DC converter that produces a negative output voltage from a positive input voltage. The magnitude of the output voltage can be higher or lower than the input voltage.
Key formulas used in this calculator are:
- Duty Cycle (D):
D = Vout_target / (Vout_target + Vin)Where:
Vin: Input Voltage (V)Vout_target: Desired Output Voltage Magnitude (V)
- Average Inductor Current (IL_avg):
IL_avg = Iout_max / (1 - D)Where:
Iout_max: Maximum Output Current (A)D: Duty Cycle
- Inductor Ripple Current (ΔIL):
ΔIL = (ΔIL% / 100) * IL_avgWhere:
ΔIL%: Inductor Ripple Current Percentage (%)IL_avg: Average Inductor Current (A)
- Inductor Value (L):
L = (Vin * D) / (fs * ΔIL)Where:
fs: Switching Frequency (Hz)
- Output Capacitor Value (Cout):
Cout = (Iout_max * D) / (fs * (ΔVout% / 100) * Vout_target)Where:
ΔVout%: Output Voltage Ripple Percentage (%)