IRPLCFL3 International Rectifier, IRPLCFL3 Datasheet
IRPLCFL3
Specifications of IRPLCFL3
Related parts for IRPLCFL3
IRPLCFL3 Summary of contents
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... International Rectifier • 233 Kansas Street, El Segundo, CA 90245 USA IRPLCFL3: A ballast that can be dimmed from a domestic (phase cut) dimmer TOPICS COVERED Introduction Dimmer Circuit Proposed Solution Block Diagram Functional Description Schematic Diagram Design Considerations Bill of Materials INTRODUCTION It has often been a disadvantage with electronic ballasts that they have been unable to be dimmed with a standard (phase cut) type of dimmer, particularly in the case of small integral ballast-lamp combinations commonly used in the home to save energy ...
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... IRPLCFL3 A BASIC 120VAC DIMMER CIRCUIT 15K 500K 47nF 33nF When a compact ballast is connected to a circuit containing such a dimmer, the triac will only conduct fired at a point during the mains half-cycle where the rectified mains voltage is greater that the storage capacitor voltage. In this instance the capacitor will be charged to the same voltage and the triac will then switch off ...
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... IRPLCFL3 In this system the front end of the ballast has been designed so that when the triac in the dimmer has fired, it will remain on continuously until almost the end of the mains half-cycle. In addition to this there is circuitry that detects the firing angle of the triac and adjusts the lamp current by increasing the switching frequency hence the controlling light output depending on the level set by the dimmer ...
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... IRPLCFL3 A snubber has also been included consisting of C2 and R2. The purpose of this is to reduce ringing caused by the resonance of the series inductors and load capacitances when the dimmer triac fires also essential in achieving this and it is important to select L1 such that it has a DC resistance of about 5 Ohms to provide additional damping ...
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... IRPLCFL3 The voltage waveform at the junction of D2 and D3, ignoring high frequency components is equivalent to the output voltage of the dimmer. With respect to the negative rail of the bus this will be a phase cut approximate sine wave with a DC offset such that the negative peak is at 0V. This is reduced by the voltage divider network of R8 and R13 which is then fed into D6 and D15 ...
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... IRPLCFL3 Dimming Characteristic 100% 50% LIGHT OUTPUT 10% 0 MINIMUM DESIGN CONSIDERATIONS Protection Circuits The SD pin of the IR2156 is used as lamp removal protection. If there is no lamp present the voltage at SD pin will be pulled above the 5.1V threshold via R22 and R21 charging C19. When a lamp is in circuit the voltage at the junction of R21 and R22 will be held low via D11 and R14 ...
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... IRPLCFL3 Component Selection The output inductor and capacitor values should be chosen for the ballast to allow it to run at maximum brightness around 40kHz. This will minimize losses in the inductor. For this example the IR Ballast Design Assistant software has been used to select the required preheat, ignition and run frequencies for a TC-DEL 26W lamp giving ...
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... IRPLCFL3 Then when the ballast is being run a true RMS digital voltmeter can be connected across one cathode and the voltage can be observed at maximum and minimum brightness. The cathode voltage increases as the ballast is dimmed. The values of C17 and C18 will control how much it increases by, reducing the capacitance will reduce the amount by which the voltage rises ...
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... IRPLCFL3 BILL OF MATERIALS Item Qt Manufacturer # National Semiconductor 2 1 International Rectifier 3 2 International Rectifier Semi 5 6 Microsemi 6 1 Diodes 7 1 Renco 8 1 B.I.Technologies 9 1 Panasonic 10 1 Panasonic 11 2 Panasonic 12 2 Roederstein 13 1 Panasonic 14 1 Panasonic 15 1 Panasonic 16 1 Panasonic 17 1 Panasonic 18 2 Panasonic ...
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... IRPLCFL3 23 1 Wima 24 1 Mallory 25 1 Panasonic 26 1 Yageo 27 1 Yageo 28 1 Yageo 29 1 Panasonic 30 1 Panasonic 31 1 Yageo 32 4 Panasonic 33 1 Panasonic 34 3 Panasonic 35 1 Panasonic 36 1 Panasonic 37 1 Panasonic 38 1 Panasonic 39 1 Dale 40 1 Panasonic 41 1 Panasonic 42 1 Panasonic ...
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... IRPLCFL3 CORE SIZE GAP LENGTH CORE MATERIAL WINDING START PIN FINISH PIN TURNS WIRE DIAMETER (mm) MAIN 1 ZX n/a AUX n/a CATHODE 2 CATHODE 3 PHYSICAL LAYOUT (Vertical 6-Pin Bobbin) Pin View TEST MAIN WINDING INDUCTANCE * Adjust turns for specified Inductance INDUCTOR SPECIFICATION E20/10/6 (EF20) 1 ...
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... Please be advised that anyone making, using or selling a ballast using the IRPLCFL3 ballast or a ballast designed or constructed in accordance with the design of the IRPLCFL3 ballast may need to obtain a license from Lutron Electronic Co., Inc., under patents US B1 5,041,763 and/ 5,001,386. IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 www ...