irs2540 International Rectifier Corp., irs2540 Datasheet
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irs2540
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irs2540 Summary of contents
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... Typical Application Diagram VBUS L2 CBUS1 COM EN www.irf.com LED BUCK REGULATOR CONTROL IC Features x 200 V (IRS2540) and 600 V (IRS2541) half bridge driver x Micropower startup (<500 PA) x ±2% voltage reference x 140 ns deadtime x 15.6 V zener clamp Frequency up to 500 kHz x Auto restart, non-latched shutdown x PWM dimmable ...
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Alternate application circuit using a single MOSFET www.irf.com IRS254(0,1)(S)PbF Page 2 ...
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... CC -20 20 -50 50 --- 1 --- 0.625 --- 125 --- 200 -55 150 -55 150 --- 300 and COM, with a nominal breakdown voltage of CC Min. Max. V – 0 CLAMP IRS2540 -1 200 IRS2541 -1 600 V V CCUV+ CLAMP Note 2 10 -25 125 . CLAMP Units V mA V/ns W ºC/W ºC CLAMP Units V mA ºC Page 3 ...
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... µA CC 1.0 2.0 EN>V ENTH+ 1.0 2 Duty Cycle = 50% 2.0 3 kHz 15.6 16 1.0 2 2.0 3 7.5 8.5 V 7.0 8.0 IRS2540 µA IRS2541 2.7 3.0 V 2.0 2.3 500 510 mV 500 540 500 --- kHz COM --- V V --- CC 50 120 0.5/0.7 --- A 140 --- 320 --- kHz square FB wave, 200 mV pk-pk ...
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Electrical Characteristics +/- 0. BIAS Symbol Watchdog timer t Watchdog timer period pulse width WWD Functional Block Diagram IFB 3 UVLO 4 ENN BANDGAP 100 ...
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STATE DIAGRAM IRS254(0,1)(S)PbF Page 6 ...
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Functional Description Operating Mode The IRS254(0,1) operates as a time-delayed hysteritic buck controller. During normal operating conditions the output current is regulated via the IFB pin voltage (nominal value of 500 mV). feedback is compared to an internal high precision ...
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Watchdog Timer During an open circuit condition, without the watchdog timer, the HO output would remain high at all times and the charge stored in the bootstrap capacitor C would gradually discharge the BOOT floating power supply for the high-side ...
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Enable Duty Cycle Relationship to Light Output 100 Percentage of Light Output Fig.5 Light Output vs Enable Pin Duty Cycle Fig.6 ...
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IC does not enter UVLO unless the supply voltage falls below V CCUV- Inductance Selection To maintain tight hysteretic current regulation the inductor and output capacitor C the LEDs) need to be large enough to maintain the supply ...
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Vin (V) Fig 350 mA 16 470 µH out out 400 350 300 250 200 150 100 Capacitance ...
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IRS254(0,1)(S)PbF Page 12 ...
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SOIC Tape & Reel F www.irf.com LOADED TAPE FEED DIRECTION B NOTE : CONTROLLING E DIM ENSION CARRIER TAPE DIMENSION FOR 8SOICN Metric Code Min Max A 7.90 8.10 0.311 B 3.90 4.10 0.153 C 11.70 ...
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... ORDER INFORMATION 8-Lead PDIP IRS2540PbF 8-Lead PDIP IRS2541PbF 8-Lead SOIC IRS2540SPbF 8-Lead SOIC IRS2541SPbF Tape & Reel 8-Lead SOIC IRS2540STRPbF Tape & Reel 8-Lead SOIC IRS2541STRPbF This product has been designed and qualified for the industrial level. Qualification standards can be found at IR WORLD HEADQUARTERS: 233 Kansas St ...