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SSL21084AT - Mains dimmable LED driver

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.

Key Features

  • 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 cycle-by-cycle current control:.
  • No overshoot or undershoot in the LED cur.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.