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IRS2541PBF Datasheet(PDF) 1 Page - International Rectifier |
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IRS2541PBF Datasheet(HTML) 1 Page - International Rectifier |
1 / 14 page www.irf.com Page 1 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 open- circuit 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. Typical Application Diagram 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 8-LeadSOIC IRS254(0,1)PbF IRS254(0,1)SPbF 1 2 3 4 8 7 6 5 VCC IFB LO VS HO VB COM M1 M2 CBOOT DBOOT RCS RF CF RS1 CVCC1 CVCC2 ROV1 ROV2 CEN DOV DEN1 L1 EN COM VBUS COUT RG1 RG2 VOUT+ VOUT- IC1 CBUS2 RS2 DCLAMP CBUS1 L2 ENN ROUT |
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