IRS2540SPBF

Data Sheet No. PD60293 IRS254(0,1)(S)PbF LED BUCK REGULATOR CONTROL IC Description The IRS254(0,1) are high voltage, high frequency buck control ICs for constant LED current regulation. They incorporate a continuous mode time-delayed hysteretic buck regulator to directly control the average load current, using an accurate on-chip bandgap voltage reference. The application is inherently protected against short circuit conditions, with the ability to easily add opencircuit protection. An external high-side bootstrap circuit drives the buck switching element at high frequencies. A low-side driver is also provided for synchronous rectifier designs. All functions are realized within a simple 8 pin DIP or SOIC package. Features 200 V (IRS2540) and 600 V (IRS2541) half bridge driver Micropower startup (<500 µA) ±2% voltage reference 140 ns deadtime 15.6 V zener clamp on VCC Frequency up to 500 kHz Auto restart, non-latched shutdown PWM dimmable Small 8-Lead DIP/8-Lead SOIC packages Packages 8-Lead PDIP IRS254(0,1)PbF 8-LeadSOIC IRS254(0,1)SPbF Typical Application Diagram VBUS L2 VOUT + RS1 RS2 DBOOT IC1 CVCC1 ROV1 CBUS2 CBUS1 DOV ROV2 CEN ENN VCC COM 1 2 8 7 6 5 VB IRS254(0,1) HO RG1 CBOOT DCLAMP CVCC2 M1 L1 IFB 3 4 VS LO M2 RG2 COUT VOUT - RF RCS ROUT CF COM EN DEN1 www.irf.com Page 1 IRS254(0,1)(S)PbF Alternate application circuit using a single MOSFET IRS254(0,1) www.irf.com Page 2 IRS254(0,1)(S)PbF Absolute Maximum Ratings Absolute...