LIGHTING High-Voltage Buck Control ICs for Constant LED Current Regulation THE POWER MANAGEMENT LEADER Features: •Micropower Startup (less than 500µA) •± 2% voltage reference •140ns deadtime •PWM Dimmable •Free running frequency •200V (IRS25401) and 600V (IRS25411) Half-Bridge Driver IC •15.6V Zener clamp on VCC •Frequency up to 500kHz •Auto restart, non latched shutdown •Small DIP8/SO8 package Benefits: •Micro power startup •Precise current regulation •Continuous current regulation •Great adaptability EMI Filter Rectifier IC and Switches Output Stage LEDs Line IC The IRS254(01/11) series is comprised of high-voltage, high-frequency buck regulator control ICs for AC-DC offline, non-isolated applications requiring multiple light emitting diode (LED) circuits or requiring DC-DC color-mixing capabilities. Applications include indoor and outdoor signage as well as architectural, entertainment, design and decorative lighting. Rated at 200V or 600V, the IRS254(01/11) series incorporates a continuous mode, timedelayed hysteretic buck regulator to control the average load current within a tolerance of five percent, using an accurate on-chip band gap voltage reference. An external high-side bootstrap circuit drives the buck switching element at high frequencies up to 500kHz. A lowside driver is also provided for synchronous rectifier designs. For more information in North America call +1 310 252 7105, in Europe call +49 6102 884 311, or visit us at www.irf.com10495D_FS High-Voltage Buck Control ICs for Constant LED Current Regulation Part Number Package Specifications IRS25401PbF DIP8 IRS25401SPbF SO-8 Narrow IRS25401STRPbF SO-8 Narrow (Tape and Reel) IRS25411PbF DIP8 IRS25411SPbF SO-8 Narrow IRS25411STRPbF SO-8 Narrow (Tape and Reel) • • • • • • • • 200V half-bridge driver IC Micropower startup (<500µA) ±2% voltage reference 140ns deadtime 15.6V Zener clamp on VCC Frequency up to 500 kHz Auto restart, non-latched shutdown PWM dimmable • • • • • • • • 600V half-bridge driver IC Micropower startup (<500µA) ±2% voltage reference 140ns deadtime 15.6V Zener clamp on VCC Frequency up to 500 kHz Auto restart, non-latched shutdown PWM dimmable note: The IRS254(01/11) are pin compatible drop in replacements for the IRS254(0/1) VBUS L2 VOUT+ RS1 RS3 DBOOT DVCC RS2 VCC CVCC1 DCLAMP CBUS2 CVCC2 DOV 2 IFB ENN ROV2 3 4 IRS25401 COM ROV1 CBUS1 IC1 1 RF CEN VB 8 HO 7 VS 6 RG1 CBOOT M1 L1 LO 5 D1 COUT VOUT- RCS CF ROUT COM EN DEN1 For more information in North America call +1 310 252 7105, in Europe call +49 6102 884 311, or visit us at www.irf.com10495D_FS