SSL2129AT

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2012. All rights reserved.

Product data sheet

Rev. 2 — 23 October 2012

10 of 21

NXP Semiconductors

SSL2129AT

Dimmable LED controller IC

8.9 Mains dimmer compatibility

control is used to shape an input current waveform to provide the most effective current to

load the dimmer over most of the mains cycle. In the dimmed position, the output current

is controlled both by the conductive phase of the dimmer and the slope current control of

the TONMOD function. An additional advantage of this method is a high-power factor.

The additional dimming range is achieved by modulating the charge current of the

capacitor connected to the TONMOD pin.