SSL21084AT

SSL21084AT Mains dimmable LED driver IC Rev. 6 — 3 October 2013 Product data sheet 1. General description The SSL21084AT is a high-voltage Integrated Circuit (IC) for driving retrofit LED lamps in general lighting applications. It enables the implementation of a very compact low-cost system solution. The IC has an integrated internal HV switch and work as Boundary Conduction Mode (BCM) buck converter. The SSL21084AT is supplied by a start-up bleeder resistor, a dV/dt supply using capacitive coupling from the drain or any other auxiliary supply. The IC supply current is low. An internal clamp limits the supply voltage. The IC has accurate output current control and can be operated using Pulse-Width Modulation (PWM) dimming. In addition, several protection features are available such as easy external temperature feedback. The main benefits of this IC include: Small Printed-Circuit Board (PCB) footprint and compact solution High efficiency (up to 90 %) for non-dimmable high power factor solutions High power factor (>0.9) Ease of integration and many protection features Low electronic Bill Of Materials (BOM) Mains phase-cut dimmable using external components Highly flexible IC for use in buck, buck/boost mode Single inductor used for non-isolated configurations because of internal demagnetization detection and dV/dt supply The SSL21084AT is designed to start up directly from the HV supply using an internal high-voltage current source. An internal clamp limits th...