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K2500S Datasheet(PDF) 6 Page - Littelfuse |
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K2500S Datasheet(HTML) 6 Page - Littelfuse |
6 / 7 page http://www.littelfuse.com E9 - 6 ©2004 Littelfuse, Inc. +1 972-580-7777 Thyristor Product Catalog Sidac Data Sheets Figure E9.15 Relaxation Oscillator Using a Sidac Figure E9.16 Sidac Added to Protect Transistor for Typical Transistor Inductive Load Switching Requirements Figure E9.17 Typical Metal Halide Ignitor Circuit V DC(IN) ≥ V B0 V C I L R L R SIDAC (a) Circuit R max ≤ V IN - V BO I BO R min ≥ V IN - V TM I H (MIN) (b) Waveforms V BO V C I L t t C VCE Monitor 100 mH IC Monitor + - RS = 0.1 Ω Test Circuit VBB1 =10 V + - VBB2 =0 RBB2 = 100 Ω RBB1 = 150 Ω 2N6127 (or equivalent) 50 Ω 50 Ω Input (See Note B) TIP-47 VCC = 20 V Voltage and Current Waveforms Input Voltage 0 V 5 V 0.63 A 0 Sidac VBO 10 V VCE(sat) tw ≈ 3 ms (See Note A) Collector Current Collector Voltage 100 ms tw Note A: Input pulse width is increased until ICM = 0.63 A. Note B: Sidac (or Diac or series of Diacs) chosen so that VBO is just below VCEO rating of transistor to be protected. The Sidac (or Diac) eliminates a reverse breakdown of the transistor in inductive switching circuits where otherwise the transistor could be destroyed. Ballast K2401F1 220 V / 240 V 50 / 60 Hz Metal Halide Lamp H.V. Step-up Transformer 0.1 – 0.15 µF 0.22 – 0.33µF 5 – 6µH 5.6K – 8.2K 5W |
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