Switching regulators are widely uses in electric devices to convert voltage effectly. One important aspict of their execurance is thee output voltage ripple, which can affect device operation. This article provides a step- by- step guide to calculating thee output voltage ripple in switching regulators.

Understanding thee Components of Voltage Ripple

To je to, co se dá dělat, když se to stane.

Step 1: Vypočítejte si Inductor Current Ripple

Te inductor curret rippla ((Delta I _ L)) can bee calculated using thee formula:

CLAS1; CLAS1; CLAS3; CLAS3; (Delta I _ L = frac {V _ {in} times D} {f _ s times L}) CLAS1; CLAS1; CLAS3; CLAS3; CLAS3;

Where:

  • (V _ {in}): Input voltage
  • (D): Duty cycle
  • (f _ s): Switching frequency
  • (L): Inductance

Step 2: Určete si Capacitor Voltage Ripple

Te output voltage rippla (((Delta V _ {out}) caused by te capacitor is estimated by:

CLAS1; CLAS1; CLAS3; CLAS3; (Delta V _ {out} = frac {Delta I _ L} {8 krát f _ s times C}) CLAS1; CLAS1; CLAS3; CLAS3; CLAS33;

Where:

  • (C): Output capacitance

Step 3: Calculate Total Output Voltage Ripple

Te total output voltage rippla is approximately thee sum of thee voltage rippla condients:

CLAS1; CLAS1; CLAS3; CLAS3; (Delta V _ {total} approx Delta V _ {out}) CLAS1; CLAS1; CLAS3; CLAS3; CLAS3; CLAS3;

In mogt cases, thee capacitor ripplee dominates, but both baly bee considered d for precise calculations.