Pulse Width Modulation (PWM) is a combine technique used in DC / DC converters to regulate output voltage. Calculating the duty cycle is essential for designing and analyzing these converters. This article provides a step-by-step guidee te duty cycle in PWM- based DC / DC converters.

Understanding Duty Cycle

Te wszystkie cykle (D) i te ratio of thee ON time of thee switch te total change period. It i s expressed a estavage or a decymal. The duty cycle directly influences thee out put voltage of thee converter.

Basic Calculation Profila

Te fundamentalne formuły for calculating thee duty cycle in a buck converter is:

(1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (2); (3); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (5); (3); (3); (3); (3); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1) (1); (1); (5);

Where Sig1; Xi1; FLT: 0 Sig3; V.3; V.1; Xig1; FLT: 1 Sig3; FLT: 1; OUT 1; XI1; FLT: 2 Sig3; XI1; FLT: 3 Sig.3; XI1; Is the desired exiput voltage andd Sig1; XI1; FLT: 4 Sig.3; FLT: 3; V Sig.1; FLT: 5 Sig.3; Ig.3; Ig.1; FLT: 6 Sig3; X.3; XIg.1; FLT: 7; FLT: 3; XIg.Is; TH the input voltage.

Etap - by- Stopień obliczenia

Follow these steps to compute thee duty cycle:

  • Identify the input voltage (indi1; indi1; fLT: 0, 5x3; 5x3; 5x1; FLT: 1, 5x3; in, 1; FLT: 2, 5x3; 5x3; 5x3; FLT: 3, 5x3; 5x3;) and the desired output voltage (indi1; FLT: 4, 5x3; FLT: 3; V, 1X3; FLT: 5, 5X3; 5X3; out, 1XI1; FLT: 6, X3; X3; XIX1; FLT: 7, X3; V3;).
  • Use the formula indis1; endis1; FLT: 0 exis3; EDI3; D = V XX1; EDI1; FLT: 1 exis3; EDIS3; out presens1; EDI1; FLT: 2 exis3; / V present1; EDI1; FLT: 3 exis3; In exis1; FLT: 4 exis3; EDI3; EDI1; EDIS1; FLT: 5 exis3; EDI3; ID3;
  • Oblicz, że to jest to, co się dzieje.
  • Wyrażenia te duty cykle as a considerage by multipliing thee decimal result by 100.

For example, if precidi1; i1; FLT: 0 support3; Xi3; V support1; FLT: 1 support3; Xi3; In support1; FLT: 2 support3; Xi3; FLT: 3 support3; Is 12V and support1; FLT: 4 support3; X3; V1; FLT: 5 support1; FLT: 3; FLT: 3; Out sup1; FLT: 6 support3; I1; FLT: 7 support3; Is 5V, then:

(zob. pkt 2.1.1.1 niniejszego załącznika)

Expressed as a message, the duty cycle is approxiately e.1.; FLT: 0 message 3; E.3; 41.67% message; E.1; FLT: 1 message3; E.3;.

Dodatek

Naprawdę-eternal factors such as consident tolerances, chandining losses, and efficiency may requires addivments to thee calculated duty cycle. It i s important to o consider these factors during design.