FLC10-200H/B ® Application Specific Discretes A.S.D.™ FIRE LIGHTER CIRCUIT FEATURES ■ ■ ■ ■ Dedicated thyristor structure for capacitance discharge ignition operation High pulse current capability 240A @ tp= 10µs Fast turn-on operation Designed for high ambient temperature (up to 120°C) TAB 3 2 TAB 1 IPAK FLC10-200H BENEFITS ■ ■ 2 Space saving thanks to monolithic function integration High reliability with planar technology DESCRIPTION The FLC10 series has been especially developed for high power capacitance discharge operation. The main applications are gas lighters or ignitors such as : cookers / gas boilers / gas hobs... Based on ST’s ASD™ technology, it provides a fully integrated function, with high performance and reliability levels, adapted to severe and hot temperature environment. Th: Thyristor for switching operation. Z: Zener diode to set the threshold voltage. D: Diode for reverse conduction. R: 2 kΩ resistor. 3 1 DPAK FLC10-200B FUNCTIONAL DIAGRAM pin 2 or Tab Z Th D R pin 1/3 (*) (*) Pin1 and Pin3 must be shorted together in the application circuit layout. October 2001 - Ed: 7E 1/8 FLC10-200H/B ABSOLUTE RATINGS (limiting values) Symbol Parameter ITRM Repetitive surge peak on state current for thyristor -30°C ≤ Tamb ≤ 120°C IFRM Repetitive surge peak on state current for diode -30°C ≤ Tamb ≤ 120°C dI/dt Critical rate of rise time on state current -30°C ≤ Tamb ≤ 120°C Tstg Tj Storage junction temperature range Maximum junction temperature Toper Value Unit 240 A 200 A/µs - 40 to + 150 + 125 °C -30 + 120 °C 260 °C tp = 10µs ( note 1) Operating temperature range Maximum lead temperature for soldering during 10s TL Note 1 : Test current waveform 10µs 200ms THERMAL RESISTANCE Symbol Parameter Value Unit Rth(j-a) IPAK thermal resistance junction to ambient 100 °C/W Rth(j-a) DPAK thermal resistance junction to ambient S = 0.5cm2 70 °C/W S = Copper Surface under Tab ORDERING INFORMATION FLC FIRE LIGHTER CIRCUIT 10 - x 200: VBO min = 20V CIRCUIT NUMBER SCR + Diode + Zener + Resistance High Power Version 2/8 200 Package:H: IPAK B: DPAK FLC10-200H/B ELECTRICAL CHARACTERISTICS Symbol I IF Parameters VRM Stand-off voltage VBO Breakover voltage VT On-state voltage VF Diode forward voltage drop IRM IBO Breakover current I BO IRM Leakage current αT Temperature coefficient for VBO V BO VRM V T VF V IT DIODE (D) PARAMETER Symbol VF Test Conditions IF = 2A tp ≤ 500µs Tj = 25°C Value Unit 1.7 V Max. THYRISTOR (Th) and ZENER (Z) PARAMETERS Symbol IRM Test conditions VRM = 200 V Min Typ Max Unit Tj = 25°C 10 µA Tj = 125°C 100 µA 250 V VBO at IBO Tj = 25°C IBO at VBO Tj = 25°C 0.5 mA VT IT = 2A Tj = 25°C 1.7 V tp ≤ 500µs αT 200 225 13 10-4/°C Fig. 1: Relative variation of breakover current versus junction temperature. k = IBO(Tj) / IBO(25°C) 2.5 2 1.5 1 0.5 0 -20 0 20 40 60 80 100 Tj (°C) 3/8 FLC10-200H/B Fig. 2: BASIC APPLICATION Ic Ic t Rs c Ds Th Z AC MAINS D R The applications of the lighter using the capacitance discharge topology operate in 2 phases : PHASE 1 The energy coming from the mains is stored into the capacitor C. For that, the AC voltage is rectified by the diode Ds. PHASE 2 At the end of the phase 1, the voltage across the capacitor C reaches the avalanche threshold of the zener. Then a current flows through the gate of the thyristor Th which fires. The firing of the thyristor causes an alternating current to flow through the capacitor C. The positive parts of this current flow through C, Th and the primary of the HV transformer. The negative parts of the current flow through C, D and the primaty of the HV transformer. COMPONENT CHOICE RS RESISTOR CALCULATION The Rs resistor allows, in addition with the capacitor C, the spark frequency to be adjusted and the current from the mains to be limited. Its value shall allow the thyristor Th to fire even in worst case conditions. In this borderline case, the system must fire with the lowest value of RMS mains voltage while the breakdown voltage and current of the FLC are at the maximum. The maximum Rs value is equal to : Rs max = (V AC min. 2 ) − [V BO max .(1 + α T .( Tamb − 25 ))] k . I BO * * : see fig 1 4/8 FLC10-200H/B Fig. 3: Spark frequency versus Rs and C F (Hz) Vac=220Vrms, Vbo=225V, Tamb=25°C 20 C=0 .47µ F C=1 10 C=1 C=2 .2µF C=2 .7µF 5 µF .5µF C=3 .3µF 3 2 1 4.7 6.8 10 12 Rs (k Ω ) The couple Rs/C can be chosen with the previous curve. Keep in mind the Rs maximum limit for which the system would not work when the AC 15 18 22 27 30 mains is minimum. The next curve shows the behavior with Rs=15kΩ and C=1µF. Fig. 4: Voltage across the capacitance with Rs = 15kΩ, C = 1µF and VBO = 225V. 5/8 FLC10-200H/B PEAK CURRENT LIMIT This component is designed to withstand ITRM = 240A for a pulse duration of 10µs for an ambient temperature of 120°C in repetitive surge (see note 1, page 2). The curve of peak current versus the pulse duration allows us to verify if the application is within the FLC operating limit. Fig. 5: Peak current limit versus pulse duration. ITRM(A) Tj max : 120°C 300 280 260 240 220 200 180 6 8 10 tp (µs) POWER LOSSES (For 10µs, see note 1) To evaluate the power losses, please use the following equations : For the thyristor : P = 1.18 x IT(AV) + 0.035 I2T(RMS) For the diode : P = 0.67 x IF(AV) + 0.106 I2F(RMS) 6/8 12 14 FLC10-200H/B PACKAGE MECHANICAL DATA DPAK DIMENSIONS REF. Millimeters Inches Min. Max Min. Max. A 2.20 2.40 0.086 0.094 A1 0.90 1.10 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.90 0.025 0.035 B2 5.20 5.40 0.204 0.212 C 0.45 0.60 0.017 0.023 C2 0.48 0.60 0.018 0.023 D 6.00 6.20 0.236 0.244 E 6.40 6.60 0.251 0.259 G 4.40 4.60 0.173 0.181 H 9.35 10.10 0.368 0.397 L2 0.80 typ. 0.031 typ. L4 0.60 1.00 0.023 0.039 V2 0° 8° 0° 8° FOOTPRINT 6.7 6.7 3 3 1.6 1.6 2.3 2.3 7/8 FLC10-200H/B PACKAGE MECHANICAL DATA IPAK DIMENSIONS REF. Millimeters Min. A E C2 B2 L2 L L1 B3 B6 A1 B V1 B5 C G A3 Min. Typ. Max. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A3 0.7 1.3 0.027 0.051 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 0.85 B5 H Typ. Max. B3 D Inches 0.033 0.3 B6 0.035 0.95 0.037 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 E 6.4 6.6 0.252 0.260 G 4.4 4.6 0.173 0.181 H 15.9 16.3 0.626 0.641 L 9 9.4 0.354 0.370 L1 0.8 1.2 0.031 0.047 L2 0.8 V1 10° 1 0.031 0.039 10° OTHER INFORMATION Type Marking Package Weight Base qty Delivery mode FLC10-200H FLC10-200H IPAK 0.40 g 75 Tube FLC10-200B FLC10-200B DPAK 0.3 g 75 Tube Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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