SSL21081AT Datasheet, PDF (1/22 Pages) NXP Semiconductors – Compact non-dimmable LED driver IC

SSL21082AT
Mains dimmable LED driver IC
Rev. 6 — 3 October 2013
Product data sheet
1. General description
The SSL21082AT 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 SSL21082AT 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 an accurate output current control and can be operated using Pulse-Width
Modulation (PWM) dimming. In addition, several protection features are available such as
easy external temperature feedback.
The main benefits of this IC include:
• Small Printed-Circuit Board (PCB) footprint and compact solution
• High efficiency (up to 90 %) 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 modes
• Single inductor used for non-isolated configurations because of internal
demagnetization detection and dV/dt supply
The IC is designed to start up directly from the HV supply using an internal high-voltage
current source. An internal clamp limits the supply voltage.