SSL21084AT Datasheet | NXP Semiconductors

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 pact 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 d V/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 pact 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 ponents - Highly flexible IC for use in buck, buck/boost mode - Single inductor used for non-isolated configurations because of internal demagnetization detection and d V/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 the supply voltage. NXP Semiconductors Mains dimmable LED driver IC 2. Features and benefits - LED driver IC for driving strings of LEDs or high-voltage LED modules from a rectified mains supply - Power-efficient boundary conduction mode operation with: - No reverse recovery losses in freewheel diode - Zero-Current Switching (ZCS) for switch turn-on - Zero-voltage or valley switching for switch turn-off - Minimal required inductance value and size - Fast transient response through...