SSL2129AT Datasheet, PDF (1/21 Pages) NXP Semiconductors – Dimmable LED controller IC

SSL2129AT
Dimmable LED controller IC
Rev. 2 — 23 October 2012
Product data sheet
1. General description
The SSL2129AT is a high-voltage Integrated Circuit (IC) for driving LED lamps in general
lighting applications.
The main benefits of this IC include:
• Small Printed-Circuit Board (PCB) footprint and compact solution
• High efficiency (up to 95 %) for non-dimmable high power factor solutions
• High power factor (>0.9)
• Ease of integration and many protection features
• Low electronic Bill Of Material (BOM)
• Mains phase-cut dimmable using external components
• Highly flexible IC for use in buck, buck/boost and flyback modes
• Single inductor used for non-isolated configurations because of internal
demagnetization detection and dV/dt supply
The IC range has been designed to start up directly from the HV supply using an internal
high-voltage current source. An internal clamp limits the supply voltage.
2. Features and benefits
 LED controller IC for driving strings of LEDs or high-voltage LED modules from a
rectified mains supply
 Controller provides power-efficient boundary conduction mode of 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 over or undershoots in the LED current
 Simple high input power factor solution (>0.9)
 Internal Protection features:
 UnderVoltage LockOut (UVLO)
 Leading-Edge Blanking (LEB)
 OverCurrent Protection (OCP)
 Internal OverTemperature Protection (OTP)