FLC01-200x
FIRE LIGHTER CIRCUIT
Application Specific Discretes A.S.D.TM
FEATURES
s
s
s
s
Dedicated thyristor structure for capacitance discharge ignition operation High pulse current capability 190A @ tp = 10s Fast turn-on operation Designed for high ambient temperature (up to 120C)
TAB
TAB
2
3 2 1
3
1
BENEFITS
s
s
Space saving thanks to monolithic function integration High reliability with planar technology
IPAK FLC01-200H
DPAK FLC01-200B
DESCRIPTION The FLC01 series has been especially developed for capacitance discharge operation. The main applications are gas lighters or ignitors such as cookers / gas boilers / gas hobs... Based on ST's ASDTM 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 k resistor. FUNCTIONAL DIAGRAM
pin 2
Z Th
D
R
pin 1 * pin 3 non connected
April 2002 Ed: 6C
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FLC01-200x
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 120 - 40 to + 150 + 125 -30 + 120 260 A/s C C C tp = 10s ( note 1) Value 190 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
01
-
200
x
(-TR)
PACKING MODE: Blank: Tube -TR: Tape & reel PACKAGE: H: IPAK B: DPAK
200: VRM = 200V FIRE LIGHTER CIRCUIT
CIRCUIT NUMBER: 01 = SCR + diode + Zener + Resistance (pin 3 not connected)
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FLC01-200x
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 VRM V T VF IR M I BO V
I IF
DIODE (D) PARAMETER Symbol VF IF = 2A Test Conditions tp 500s Tj = 25C Max. Value 1.7 Unit V
THYRISTOR (Th) and ZENER (Z) PARAMETERS Symbol IRM VBO IBO VT T VRM = 200 V at IBO at VBO IT = 2A tp 500s Test conditions Tj = 25C Tj = 125C Tj = 25C Tj = 25C Tj = 25C 0.27 206 220 Min. Typ. Max. 1 10 233 0.5 1.7 Unit A A V mA V V/C
Fig. 1: Relative variation of breakover current versus junction temperature.
k = IBO(Tj) / IBO(25C)
2.5
2
1.5
1
0.5
0
-20
0
20
40
60
80
100
Tj (C)
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FLC01-200x
Fig. 2: BASIC APPLICATION
Ic Ic
t
Rs Ds
c
Th
AC
Z
D
MAINS R
FLC01-200x
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.
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 the worst case. In this case the system must fire with the lower RMS mains voltage value 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
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FLC01-200x
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 C=1 C=2 .2F C=2 .7F .3F .5F
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.
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FLC01-200x
PEAK CURRENT LIMIT This component is designed to withstand ITRM = 190A for a pulse duration of 10s for an Fig. 5: Peak current limit ambient temperature of 120C in repetitive surge. The curve of peak current versus the pulse duration allows us to verify if the application is within the FLC operating limit.
ITRM(A) 250 200 150 100 50 5.0
Tj max=120C
7.5
10.0 tp (s)
12.5
15.0
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 I2F(RMS)
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FLC01-200x
PACKAGE MECHANICAL DATA DPAK DIMENSIONS Millimeters Inches Min. Max Min. Max. 2.20 2.40 0.086 0.094 0.90 1.10 0.035 0.043 0.03 0.23 0.001 0.009 0.64 0.90 0.025 0.035 5.20 5.40 0.204 0.212 0.45 0.60 0.017 0.023 0.48 0.60 0.018 0.023 6.00 6.20 0.236 0.244 6.40 6.60 0.251 0.259 4.40 4.60 0.173 0.181 9.35 10.10 0.368 0.397 0.80 typ. 0.031 typ. 0.60 1.00 0.023 0.039 0 8 0 8
REF. A A1 A2 B B2 C C2 D E G H L2 L4 V2
FOOTPRINT (in millimeters)
6.7
6.7
3 3 1.6 2.3 2.3 1.6
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FLC01-200x
PACKAGE MECHANICAL DATA IPAK DIMENSIONS Millimeters Inches Min. Typ. Max. Min. Typ. 2.2 2.4 0.086 0.9 1.1 0.035 0.7 1.3 0.027 0.64 0.9 0.025 5.2 5.4 0.204 0.85 0.3 0.035 0.95 0.45 0.6 0.017 0.48 0.6 0.019 6 6.2 0.236 6.4 6.6 0.252 4.4 4.6 0.173 15.9 16.3 0.626 9 9.4 0.354 0.8 1.2 0.031 0.8 1 0.031 10 10
REF. A A1 A3 B B2 B3 B5 B6 C C2 D E G H L L1 L2 V1
A E B2 L2 C2
Max. 0.094 0.043 0.051 0.035 0.212 0.033 0.037 0.023 0.023 0.244 0.260 0.181 0.641 0.370 0.047 0.039
D
H L
L1
B6
B3 B V1 A1
B5 G
C A3
OTHER INFORMATION Type FLC01-200H FLC01-200B FLC01-200B-TR Marking FLC01-200H FLC01-200B FLC01-200B Package IPAK DPAK DPAK Weight 0.40 g 0.40 g 0.40 g Base qty 75 75 2500 Delivery mode Tube Tube Tape & reel
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 2002 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 8/8
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