Datasheet

Design Calculations

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Resulting component choice:

(70)

14.7 COFF Current Source

Calculate off-time,

(71)

Choose current through resistor R16: 50µA

Calculate R16,

(72)

Calculate capacitor C12,

(73)

14.8 PassFET

Calculate maximum peak voltage:

(74)

Calculate current:

(75)

Calculate power dissipation:

(76)

Resulting component choice:

(77)

14.9 Input Capacitance

Minimum capacitance:

(78)

AC Voltage rating:

(79)

DC Voltage rating:

AN-2090 LM3448 -120VAC, 6W Isolated Flyback LED Driver SNOA554C–October 2011–Revised May 2013

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