V-Tec C5-AT25/D4 Manual de usuario descargar pdf (Pagina 21)

User manual Rev. 1.1 — 15 October 2014 21 of 24

NXP Semiconductors

UM10812

SSL5301DB1233 230 V 36 W LED driver demo board

12.3 Start-up behavior of V

12.4 Flyback transformer construction and wire diameter

The secondary windings are sandwiched between the 1

and 2

primary windings for low

primary leakage inductance.

Fig 12. Behavior of V

and I

LED

during start-up

Table 7. Flyback transformer construction

Wire Description

primary 21 turns of bifilar wire;  = 0.2 mm copper

secondary 15 turns of TIW;  = 0.4 mm copper

primary 21 turns of bifilar wire;  = 0.2 mm copper

auxiliary 12 turns;  = 0.4 mm copper

1 2 ... 16 17 18 19 20 21 22 23 24

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V-Tec C5-AT25/D4 Manual de usuario Pagina 21