FLC10-200H/B
FIRE LIGHTER CIRCUIT
Application Specific Discretes A.S.D.TM
FEATURES
s
TAB
s
s
s
Dedicated thyristor structure for capacitance discharge ignition operation High pulse current capability 240A @ tp= 10s Fast turn-on operation Designed for high ambient temperature (up to 120C)
3
TAB
2 1
BENEFITS
s
IPAK FLC10-200H
2 1 3
s
Space saving thanks to monolithic function integration High reliability with planar technology
DPAK FLC10-200B
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 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 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
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FLC10-200H/B
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) Rth(j-a) Parameter IPAK thermal resistance junction to ambient DPAK thermal resistance junction to ambient S = 0.5cm2 Value 100 70 Unit C/W C/W
S = Copper Surface under Tab
ORDERING INFORMATION
FLC
FIRE LIGHTER CIRCUIT
10
-
200
x
Package:H: IPAK B: DPAK
200: VBO min = 20V
CIRCUIT NUMBER SCR + Diode + Zener + Resistance High Power Version
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FLC10-200H/B
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 VR M V T VF IR M 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)
Min
Typ
Max 10 100
Unit A A V mA V 10-4/C
at IBO at VBO IT = 2A tp 500s
Tj = 25C Tj = 25C Tj = 25C
200
225
250 0.5 1.7
13
2.5
2
1.5
1
0.5
0
-20
0
20
40
60
80
100
Tj (C)
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FLC10-200H/B
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, 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 + T .( Tamb - 25 ))] k . I BO *
* : see fig 1
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FLC10-200H/B
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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FLC10-200H/B
PEAK CURRENT LIMIT This component is designed to withstand I TRM = 2 4 0 A f o r a p u l s e d u r a t i o n o f 1 0 s f o r a n 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 I2F(RMS)
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FLC10-200H/B
PACKAGE MECHANICAL DATA DPAK DIMENSIONS REF. A A1 A2 B B2 C C2 D E G H L2 L4 V2 Millimeters Min. 2.20 0.90 0.03 0.64 5.20 0.45 0.48 6.00 6.40 4.40 9.35 0.60 0 Max 2.40 1.10 0.23 0.90 5.40 0.60 0.60 6.20 6.60 4.60 10.10 1.00 8 Inches Min. 0.086 0.035 0.001 0.025 0.204 0.017 0.018 0.236 0.251 0.173 0.368 0.023 0 Max. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 0.259 0.181 0.397 0.039 8
0.80 typ.
0.031 typ.
FOOTPRINT
6.7
6.7
3 3 1.6 2.3 2.3 1.6
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FLC10-200H/B
PACKAGE MECHANICAL DATA IPAK DIMENSIONS REF. A A1
A E B2 L2 C2
Millimeters Min. 2.2 0.9 0.7 0.64 5.2 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 Typ. Max. 2.4 1.1 1.3 0.9 5.4 0.85 Min. 0.086 0.035 0.027 0.025 0.204
Inches Typ. Max. 0.094 0.043 0.051 0.035 0.212 0.033 0.035 0.037 0.023 0.023 0.244 0.260 0.181 0.641 0.370 0.047 0.031 0.039 10
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
OTHER INFORMATION Type FLC10-200H FLC10-200B Marking FLC10-200H FLC10-200B Package IPAK DPAK Weight 0.40 g 0.3 g Base qty 75 75 Delivery mode Tube 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.
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