SSL2129AT datasheet(1/21 Pages) NXP

No de pièce	SSL2129AT

Description	Dimmable LED controller IC

PDF	21 Pages

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Fabricant	NXP [NXP Semiconductors]

Site Internet	http://www.nxp.com

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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)

SSL2129AT

Dimmable LED controller IC

Rev. 2 — 23 October 2012

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