General description
The SSL21084T 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 incorporates an integrated internal HV switch and works as Boundary Conduction Mode (BCM) buck converter.

FEATUREs and benefits
■ LED driver IC for driving strings of LEDs or high-voltage LED modules from a rectified mains supply
■ Power-efficient boundary conduction mode 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 overshoot or undershoot 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)
    ◆ Short-winding protection (SWP)
    ◆ Internal OverTemperature Protection (OTP)
    ◆ Brownout protection
    ◆ Output Short Protection (OSP)
■ Mains phase cut dimmable LED driver solution:
    ◆ Supports both leading-edge 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

APPLICATIONs
    The SSL21084T are intended for mains dimmable compact LED lamps for single mains input voltages. Mains input voltages include 100 V (AC), 120 V (AC) and 230 V (AC).