LIGHTING THE POWER MANAGEMENT LEADER Features • Internal high voltage regulator • Hysteretic current control • High side current sensing High-Voltage Buck Control ICs for Constant LED Current Regulation LEDrivIR ™ • PWM dimming with analog or PWM control input • Free running frequency with maximum limiting (150kHz) Benefits • Low component count • Off-line operation • Very simple design • Inherent stability • Inherent short circuit protection The IRS2980 is the latest addition to IR’s range of Buck controllers complementing the existing IRS25401/11 series for non-isolated LED driver applications. The IRS2980 includes a high voltage regulator which enables the IRS2980 to be supplied directly from the input voltage bus and differential high side current sensing enabling the use of a single MOSFET and ultra-fast diode as well as maximum frequency limiting. These improvements provide design simplification and cost saving while being able to operate up to 450V with adequate thermal relief. A PWM dimming interface is also incorporated making the IRS2980 a versatile low cost LED driver solution. Applications include LED bulb replacement, indoor and outdoor signage as well as architectural, entertainment design and decorative lighting. The IRS2980 and IRS25401/11 operate in continuous conduction mode using hysteretic average current control. For more information in North America call +1 310 252 7105, in Europe call +49 6102 884 311, or visit us at www.irf.com 11349A_FS High-Voltage Buck Control ICs for Constant LED Current Regulation EMI Filter Rectifier IC and Switches LEDs Line IC IRPLLED7 Demo Board LED Current vs Input Voltage 390 Current (mA) 380 370 360 350 340 LED Current (mA) 330 320 60 70 80 90 100 110 120 130 140 150 160 170 180 310 Input Voltage LEDrivIR™ IRS2980 Specifications • Input Voltage 70V to 250V (AC) • Output Voltage 0V to 50V (DC) • Regulated Output Current: 350mA • Power Factor > 0.9 • Low component count • Dimmable 0 to 100% • Non-isolated Buck regulator Package Voltage Load Current Regulation Startup Current Frequency IRS2980S SO-8 450V +/-5% <250 µA <150 kHz IRS25401S SO-8 200V +/-5% <500 µA <500 kHz IRS25411S SO-8 600V +/-5% <500 µA <500 kHz Part Number For more information in North America call +1 310 252 7105, in Europe call +49 6102 884 311, or visit us at www.irf.com 11349A_FS