IRS2541 International Rectifier, IRS2541 Datasheet
IRS2541
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IRS2541 Summary of contents
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... DataSheet U .com LED BUCK REGULATOR CONTROL IC 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 V • Frequency up to 500 kHz • Auto restart, non-latched shutdown • ...
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DataSheet U .com Alternate application circuit using a single MOSFET IRS254(0,1)(S)PbF Page 2 ...
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... V + 0 -50 50 V/ns --- 1 --- 0.625 --- 125 ºC/W --- 200 -55 150 -55 150 --- 300 and COM, with a nominal breakdown voltage of CC CLAMP Min. Max. Units V – 0 CLAMP IRS2540 -1 200 IRS2541 -1 600 V V CCUV+ CLAMP Note -25 125 ºC . CLAMP V W ºC V Page 3 ...
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... 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:V =V =200 µA IRS2541:V =V =600 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 ENN 4 BANDGAP ...
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DataSheet U .com 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 ...
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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 ...
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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 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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Fig 350 mA, V out 400 350 300 250 200 150 100 Capacitance (uF) Fig 350 mA, V out The addition ...
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DataSheet U .com IRS254(0,1)(S)PbF Page 12 ...
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SOIC Tape & Reel www.irf.com 4 DataSheet U .com LOADED TAPE FEED DIRECTION B F NOTE : CONTROLLING E DIM ENSION CARRIER TAPE DIMENSION FOR 8SOICN Metric Code Min Max A 7.90 8.10 B 3.90 ...
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... DataSheet U .com ORDER INFORMATION 8-Lead PDIP IRS2540PbF 8-Lead PDIP IRS2541PbF 8-Lead SOIC IRS22540SPbF 8-Lead SOIC IRS22541SPbF Tape & Reel 8-Lead SOIC IRS2540STRPbF Tape & Reel 8-Lead SOIC IRS2541STRPbF This product has been designed and qualified for the industrial level. ...