Dimmable LED controller IC

Topologie: Buck
Eingangsspannung (min.): 230.00 V
Eingangsspannung (max.): 230.00 V
Ausgang 1: 95.00 V / 0.050 A
Ausgang 2: 10.00 V / 0.480 A

Erstveröffentlichung am 19.12.2012, Version 4 vom


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 supplyThe 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.


  • 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)
  • Brownout protection
  • Mains phase cut dimmable LED driver solution:
  • Supports both leading and trailing-edge dimmers
  • Easy external temperature protection with a single NTC
  • Open output protection using external components
  • Compatible with wall switches with built-in indication light during standby
  • IC lifetime easily matches or surpasses LED lamp lifetime
  • Input current distributed evenly over the phase, reducing required output capacitor size and bleeder dissipation


Artikel Nr. SPEC Produktserie Muster
750313295 PDF Custom Specific Transformer

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • SSL2129AT
    Topologie: Buck-Boost, Eingangsspannung (min.): 230.00 V, Eingangsspannung (max.): 230.00 V, Ausgang 1: 18.00 V / 0.310 A
  • SSL2129AT
    Topologie: Buck, Eingangsspannung (min.): 230.00 V, Eingangsspannung (max.): 230.00 V, Ausgang 1: 11.00 V / 0.380 A, Ausgang 2: 85.00 V / 0.060 A