Hot-selling and scarce SSL21083T/1 GreenChip drivers for LED lighting SOP8 spot stock

Product Descriptions

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

The main benefits of the product family are:

• Small Printed-Circuit Board (PCB) footprint, and compact solution 

• High efficiency (up to 95 %) 

• Ease of integration 

• Low electronic Bill Of Material (BOM)

The product family is made of ICs with a range of internal HV switches for easy power  scaling.

The ICs work as boundary conduction mode converters, typically in buck configuration.  The IC range has been designed to start up directly from the HV supply by an internal  high-voltage current source. Thereafter, the dV/dt supply is used with capacitive coupling  from the drain, or any other auxiliary supply. This functionality provides full flexibility in the  application design. The IC consumes 1.3 mA of supply current with an internal clamp  limiting the supply voltage.

The ICs provide accurate output current control with LED current accuracy within 5%. The  ICs can be operated using Pulse-Width Modulation (PWM) dimming and has many  protection features including easy LED temperature feedback.

Product Features

 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

Product 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.

Product Photos

For more product information, please download the PDF