General description
The SSL2108X is a range of high-voltage Integrated Circuits (ICs), intended to drive LED lamps in general lighting applications.

FEATUREs and benefits
■ LED driver IC family driving strings of LEDs from a rectified mains supply
■ High-efficiency switch mode buck driver product family:
    ◆ Drivers with integrated 300 V (SSL21081 and SSL21082) or 600 V (SSL21083 and SSL21084) power switches
■ Controller with power-efficient boundary conduction mode of operation with:
    ◆ No reverse recovery losses in freewheel diode
    ◆ Zero Current Switching (ZCS) for turn-on of switch
    ◆ Zero voltage or valley switching for turn-on of switch
    ◆ Minimal required inductance value and size
■ Direct PWM dimming possible
■ Fast transient response through cycle-by-cycle current control:
    ◆ Negligible AC mains ripple at LED current and minimal total capacitor value
    ◆ No over or undershoots in the LED current
■ No binning on LED forward voltage required
■ Internal Protections:
    ◆ UnderVoltage LockOut (UVLO)
    ◆ Leading-Edge Blanking (LEB)
    ◆ OverCurrent Protection (OCP)
    ◆ Short-Winding Protection (SWP)
    ◆ Internal OverTemperature Protection (OTP)
    ◆ Brownout protection
    ◆ Output Short Protection (OSP)
■ Low component count (see Figure 4) LED driver solution:
    ◆ No Schottky diode required due to ZCS
    ◆ No dim switch and high-side driver required for PWM dimming
    ◆ Easy external temperature protection with a single NTC resistor
    ◆ Option for soft-start function
    ◆ Compatible with wall switches with built-in indication light during standby1
■ IC lifetime easily matches or surpasses LED lamp lifetime

APPLICATIONs
    SSL2108X products are intended for compact LED lighting applications with accurate fixed current output for single mains input voltages. Mains input voltages include 100 V, 120 V and 230 V (AC). The output signal can be modulated using a PWM signal.