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IR21571 Datasheet(PDF) 1 Page - International Rectifier |
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IR21571 Datasheet(HTML) 1 Page - International Rectifier |
1 / 18 page Features • Programmablepreheattime&frequency • Programmable ignition ramp • Protection from failure-to-strike • Lamp filament sensing & protection • Protection from operation below resonance - 0.2V CS threshold sync’d to falling edge on LO • Protection from low-line condition • Automatic restart for lamp exchange FULLY INTEGRATED BALLAST CONTROL IC Typical Connection • Thermal overload protection • Programmable deadtime • Integrated 600V level-shifting gate driver • Internal 15.6V zener clamp diode on VCC • Micropower startup (150uA) • Latch immunity protection on all leads • ESD protection on all leads • Parts also available LEAD-FREE Description The IR21571 is a fully integrated, fully protected 600V ballast control IC designed to drive virtually all types of rapid start fluorescent lamp ballasts. Externally pro- grammable features such as preheat time & frequency, ignition ramp characteris- tics, and running mode operating frequency provide a high degree of flexibility for the ballast design engineer. Comprehensive protection features such as protec- tion from failure of a lamp to strike, filament failures, low dc bus conditions, thermal overload, or lamp failure during normal operation, as well as an automatic restart function, have been included in the design. The heart of this control IC is a variable frequency oscillator with externally programmable deadtime. Precise control of a 50% duty cycle is accomplished using a T-flip-flop. The IR21571 is available in both 16 pin DIP and 16 pin narrow body SOIC packages. Packages 16 Lead SOIC (narrow body) 16 Lead PDIP + V BUS + Rectified AC Line V BUS return R PH R RUN C START R START R T C T C RAMP C PH R DT C BS D BOOT R Supply C VCC R CS L RES C RES R GHS R GLS C BLOCK C SNUBBER R1 R2 C1 R OC R4 R3 R5 C2 D1 D2 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VDC CPH RPH RT RUN CT DT OC LO COM VCC VB VS HO SD CS www.irf.com 1 IR21571(S) & (PbF) Not recommended for new design: please use IRS21571D Data Sheet PD No. 60179 revM |
Similar Part No. - IR21571_15 |
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Similar Description - IR21571_15 |
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