Calculadora de Eficiencia de Regulador Conmutado Gratis
Calcula la eficiencia de fuentes conmutadas (buck, boost, buck-boost) incluyendo pérdidas de conmutación.
Input Power
7.33 W
Input Power vs Input Voltage
Fórmula
## Switching Regulator Efficiency ### Formulas **P_in = P_out / Efficiency** **I_in = P_out / (Efficiency x V_in)** Switching regulators convert voltage using rapid switching and an inductor. They achieve 85-95% efficiency regardless of voltage ratio, far better than linear regulators for large step-downs.
Ejemplo Resuelto
12 V to 3.3 V at 2 A with 90% efficiency.
- 01P_out = 3.3 x 2 = 6.6 W
- 02P_in = 6.6 / 0.9 = 7.33 W
- 03I_in = 7.33 / 12 = 0.611 A
- 04Power lost = 7.33 - 6.6 = 0.73 W
Preguntas Frecuentes
Buck vs boost vs buck-boost?
Buck steps voltage down, boost steps up, buck-boost can do either. Choose based on your input vs output voltage relationship.
What affects efficiency?
Switching frequency, inductor DCR, MOSFET Rds(on), diode losses, and controller quiescent current all reduce efficiency.
Why not always use switching regulators?
They generate switching noise (EMI). Linear regulators are preferred for noise-sensitive circuits like ADCs and audio.
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