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| (R) FLC10-200H FIRE LIGHTER CIRCUIT Application Specific Discretes A.S.D.TM FEATURES n n DEDICATED THYRISTOR STRUCTURE FOR CAPACITANCE DISCHARGE IGNITION OPERATION HIGH PULSE CURRENT CAPABILITY 240A @ tp= 10s TAB BENEFITS n 2 1 3 n SPACE SAVING THANKS TO MONOLITHIC FUNCTION INTEGRATION HIGH RELIABILITY WITH PLANAR TECHNOLOGY IPAK DESCRIPTION The FLC10 series have been developed especially for high power capacitance discharge operation. The main applications are gas lighter or ignitor such as : cookers / gas boilers / gas hobs... It uses a high performance planar diffused technology adapted to high temperature and rugged environmental conditions. Th : Thyristor for switching operation. Z : Zener diode to set the threshold voltage. D : Diode for reverse conduction. R : 2 k resistor. FUNCTIONAL DIAGRAM pin 2 Z Th D R pin 1/3 (*) (*)Pin1 and Pin3 must be shorted together in the application circuit layout. Jun 2000 - Ed: 5D 1/7 FLC10-200H ABSOLUTE RATINGS (limiting values) Symbol ITRM IFRM dI/dt Tstg Tj Toper TL Parameter Repetitive surge peak on state current for thyristor -30C Tamb 120C Repetitive surge peak on state current for diode -30C Tamb 120C Critical rate of rise time on state current -30C Tamb 120C Storage junction temperature range Maximum junction temperature Operating temperature range Maximum lead temperature for soldering during 10s 200 - 40 to + 150 + 125 -30 + 120 260 A/s C C C tp = 10s ( note 1) Value 240 Unit A Note 1 : Test current waveform 10s 200ms THERMAL RESISTANCE Symbol Rth(j-a) Parameter Thermal resistance junction to ambient Value 100 Unit C/W ORDERING INFORMATION FLC 10 - 200 H 200: VRM = 200V FIRE LIGHTER CIRCUIT PACKAGE H: IPAK CIRCUIT NUMBER: SCR + diode + Zener + Resistance High Power Version 2/7 FLC10-200H ELECTRICAL CHARACTERISTICS Symbol VRM VBO VT VF IBO IRM T Parameters Stand-off voltage Breakover voltage On-state voltage Diode forward voltage drop Breakover current Leakage current Temperature coefficient for VBO IT V BO V RM V T VF IRM I BO V I IF DIODE (D) PARAMETER Symbol VF IF = 2A tp 500s Test Conditions Tj = 25C Max. Value 1.7 Unit V THYRISTOR (Th) and ZENER (Z) PARAMETERS Symbol IRM VRM = 200 V Test conditions Tj = 25C Tj = 125C VBO IBO VT T Fig.1: Relative variation of breakover current versus junction temperature. k = IBO(Tj) / IBO(25C) 2.5 2 1.5 1 0.5 0 Min Typ Max 10 100 Unit A A V mA V V/C at IBO at VBO IT = 2A tp 500s Tj = 25C Tj = 25C Tj = 25C 200 225 250 0.5 1.7 0.3 -20 0 20 40 60 80 100 Tj (C) 3/7 FLC10-200H Fig. 2: BASIC APPLICATION Ic Ic t Rs Ds c Th AC Z D R MAINS 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, to adjust the spark frequency and to limit the current from the mains. 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 + T .( Tamb - 25 ))] k . I BO * * : see fig 1 4/7 FLC10-200H Fig. 3 : Spark frequency versus Rs and C F (Hz) 20 Vac=220Vrms, Vbo=225V, Tamb=25C C=0 .47 F 10 5 C=3 C=1 .5F C=2 .2F C=2 .7F .3F C=1 F 3 2 1 4.7 6.8 10 12 Rs (k ) 15 18 22 27 30 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 mains is minimum. The next curve shows the behavior with Rs=15k and C=1F. Fig. 4: Voltage across the capacitance with Rs = 15k, C = 1F and VBO = 225V. 5/7 FLC10-200H PEAK CURRENT LIMIT T hi s c o m po nen t i s des i g ned t o w i t hs t an d I TRM = 240A for a pulse duration of 10s for an ambient temperature of 120C in repetitive surge (see note 1, page 2). Fig. 5: Peak current limit versus pulse duration. The curve of peak current versus the pulse duration allows us to verify if the application is within the FLC operating limit. ITRM(A) 300 280 260 240 220 200 180 6 8 10 tp (s) Tj max : 120C 12 14 POWER LOSSES (For 10s, 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 I 2 F(RMS) 6/7 FLC10-200H PACKAGE MECHANICAL DATA IPAK REF. Min. A A1 A E B2 L2 C2 DIMENSIONS Millimeters Typ. Max. 2.4 1.1 1.3 0.9 5.4 0.85 0.3 0.95 0.45 0.48 6 6.4 4.4 15.9 9 0.8 0.8 10 0.6 0.6 6.2 6.6 4.6 9.4 1.2 1 0.017 0.019 0.236 0.252 0.173 0.354 0.031 10 0.035 0.037 0.023 0.023 0.244 0.260 0.181 0.641 0.370 0.047 0.031 0.039 Min. 0.086 0.035 0.027 0.025 0.204 2.2 0.9 0.7 0.64 5.2 Inches Typ. Max. 0.094 0.043 0.051 0.035 0.212 0.033 A3 B B2 B3 B5 D B6 C C2 H L L1 B6 B3 B V1 A1 D E G C A3 B5 G H L L1 L2 V1 16.3 0.626 Type FLC10-200H Marking FLC10-200H Package IPAK Weight 0.350g Base qty 75 Delivery mode 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. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2000 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 7/7 |
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