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ISL1904EVAL2Z датащи(PDF) 1 Page - Renesas Technology Corp |
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ISL1904EVAL2Z датащи(HTML) 1 Page - Renesas Technology Corp |
1 / 21 page FN8286 Rev 1.00 Page 1 of 21 September 20, 2012 FN8286 Rev 1.00 September 20, 2012 ISL1904 Dimmable AC Mains LED Driver with PFC and Primary Side Regulation DATASHEET The ISL1904 is a high-performance, critical conduction mode (CrCM), flyback controller used for single-stage conversion of the AC mains to a constant current source with power factor correction (PFC). The controller regulates the output current by monitoring the primary side switching current so the feedback signal does not cross the isolation barrier. Operation in CrCM allows near zero-voltage quasi-resonant switching (ZVS) for improved efficiency while maximizing magnetic core utilization. The ISL1904 LED driver provides all of the features required for high-performance dimmable LED ballast designs and supports AC or DC input, isolated or non-isolated flyback and boost topologies. This advanced BiCMOS controller features all of the functions required to design low cost low parts count LED driver. Features • Excellent LED current regulation over line, load, and temperature • 0 - 100% dimming with leading-edge (triac) and trailing-edge dimmers • Power factor correction for up to 0.995 power factor and less than 20% harmonic content • Critical conduction mode (CrCM) operation for quasi-resonant high efficiency performance • Supports universal AC mains input • Configurable for PWM or DC current dimming control of LEDs • Monitors FET switching current for load regulation • Supports isolated and non-isolated boost and flyback topologies • Closed loop soft-start for no overshoot • OFFREF feature to set dimming off-point to improve fixture performance matching • -40°C to +125°C operation • Pb-free (RoHS compliant) Applications • Industrial and commercial LED lighting • Retrofit LED lamps with triac dimming • Universal AC mains input LED retrofit lamps • AC or DC Input LED ballasts FIGURE 1A. TYPICAL APPLICATION FIGURE 1B. LED CURRENT vs LINE VOLTAGE FIGURE 1. TYPICAL APPLICATION PERFORMANCE EMI Filter AC Mains 8 13 3 DHC 6 7 DELADJ GND VREF IOUT OUT OC FB ISL1904 VDD CS+ 5 14 1 4 12 AC 10 RAMP 16 9 VERR 700 750 800 850 550 600 650 180 190 200 210 220 230 240 250 260 270 LINE VOLTAGE (VRMS) 6LEDs 4LEDs 5LEDs NOT RECOMMENDED FOR NEW DESIGNS NO RECOMMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc |
Аналогичный номер детали - ISL1904EVAL2Z |
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Аналогичное описание - ISL1904EVAL2Z |
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