Dimmable LED controller IC
Description
SSL2129AT
Dimmable LED driver IC
Rev.
4 — 3 October 2013
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
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 driver IC for driving strings of LEDs or high-voltage LED modules from a rectified mains supply
Driver 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)
NXP Semiconductors
SSL2129AT
Dimmable LED driver IC
Brownout protection Output Short Protection (OSP) 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 lig...
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