V-Tec C5-AT25/D4 Uživatelský manuál stáhnout pdf (Strana 8)

UM10713 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.

User manual Rev. 1 — 3 June 2014 8 of 19

NXP Semiconductors

UM10713

SSL5301DB1215 120 V 13 W buck converter

6.5 Dimming curves

Figure 9 shows the output current for a leading-edge dimmer and a trailing-edge dimmer.

The output current without dimmer is also indicated. The maximum output current with

dimmer equals 92 % of the output current when no dimmer is used. As a result, the input

power of the SSL5301DB1215 demo board with no dimmer is similar to when a dimmer is

used and set at its maximum angle.

a. Leading-edge dimmer b. Trailing-edge dimmer

Fig 9. Output current as a function of dimmer angle

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