FLC21 [STMICROELECTRONICS]
LOW POWER FIRE LIGHTER CIRCUIT; 低功耗消防打火机电路
| 型号： | FLC21 |
| 厂家： | 
ST |
| 描述： | LOW POWER FIRE LIGHTER CIRCUIT |
| 文件： | 总6页 (文件大小：48K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FLC21 FAMILY
LOW POWER
FIRE LIGHTER CIRCUIT
Application Specific Discretes
A.S.D.TM
FEATURES
n
DEDICATED THYRISTOR STRUCTURE FOR
CAPACITIVE
OPERATION
DISCHARGE
IGNITION
n
n
HIGH PULSE CURRENT CAPABILITY
IFRM = 90A @ tp = 10µS
AC OR DC OPERATION CAPABILITY WITH
SUPPLY FROM THE AC MAINS OR A DC
BATTERY.
1
2
3
BENEFITS
TO92
(Plastic)
n
SPACE SAVING THANKS TO MONOLITHIC
FUNCTION INTEGRATION
n
HI G H RELIABI LI TY WI TH PLANAR
TECHNOLO G Y
FUNCTIONAL DIAGRAM
DESCRIPTION
pin 3
The FLC21 series have been developed especially
for capacitance discharge operation. The main
applications are: fuel ignitor, fuel or gas heater,
gas range, cook top, barbecue, water heater,
HVAC, portable ignitor, insect killers.
Z
Th
D
It uses a high performance planar diffused
technology device adapted to high temperature in
rugged environmental conditions.
R
The typical supply of the FLC21 fire lighter circuit is
a DC battery or the AC mains.
pin 1
Th: Thyristor for the switching operation.
Z: Zener diode to set the igniting threshold voltage.
D: Diode for the reverse conduction.
R: 2 kΩ resistor.
pin 2 not connected
DEVICE
APPLICATION
MODE
Ignition
Ignition
TYPE
FLC21-135A BATTERY
OPERATION
FLC21-65A
100V Mains
Jun 2000 - Ed: 4D
1/6
FLC21 FAMILY
ABSOLUTE RATINGS (limiting values)
Symbol
Parameter
Value
Unit
ITRM
IFRM
dI/dt
Repetitive surge peak on state current for thyristor
-30°C ≤ Tamb ≤ 120°C
tp = 10µs
( note 1)
90
A
Repetitive surge peak on state current for diode
-30°C ≤ Tamb ≤ 120°C
Critical rate of rise on state current -30°C ≤ Tamb ≤ 120°C
50
A/µs
°C
Storage junction temperature range
Maximum junction temperature
Tstg
Tj
- 40 to + 150
125
Tamb
TL
Operating temperature range
- 30 to + 120
260
°C
°C
Maximum lead temperature for soldering during 10s
Note 1 : Test current waveform
10µs
100ms
THERMAL RESISTANCE
Symbol
Parameter
Value
Unit
Rth(j-a)
Junction to ambient
150
°C/W
ORDERING INFORMATION
FLC 2 1 - 135
A
PACKAGEA: TO92
FIRE LIGHTER CIRCUIT
ITRM = 90A
135: VRM = 135V
65: VRM = 65V
CIRCUIT NUMBER:
SCR + diode + Zener + Resistance
2/6
FLC21 FAMILY
I
ELECTRICAL CHARACTERISTICS
IF
Symbol
VRM
VBO
VT
Parameters
Stand-off voltage
Breakover voltage
V
V
V
F
T
BO
V
V
RM
On-state voltage
I
I
RM
BO
VF
Diode forward voltage drop
Breakover current
IBO
Leakage current
IRM
I
T
αT
Temperature coefficient for VBO
DIODE (D) PARAMETER
Symbol
Test Conditions
tp ≤ 500µs
Value
Unit
VF
IF = 1A
Tj = 25°C
Max.
1.7
V
THYRISTOR (Th) and ZENER (Z) PARAMETERS
Value
Symbol
Test conditions
FLC21-65A
FLC21-135A
Unit
Min. Typ. Max. Min. Typ. Max.
IRM
VRM = 65V for FLC21-65A
VRM = 135V for FLC21-135A
at IBO
Tj = 25°C
Tj = 125°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
1
1
µA
µA
V
10
10
VBO
IBO
VT
70
80 140
500
160
500
1.7
at VBO
µA
V
IT = 2A
tp ≤ 500µs
1.7
αT
0.07
0.16
V/°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)
3/6
FLC21 FAMILY
Fig. 2: BASIC AC MAINS APPLICATION
Ic
Ic
t
c
S1
Rs
Ds
Th
Z
AC
MAINS
D
R
Fig. 3: BASIC DC APPLICATION
Ic
Ic
t
c
Rs
Ds
S1
DC/AC
Oscillator
Th
Z
D
R
PHASE 2
1/ IGNITION MODE
PHASE 1
At the end of the phase 1, the voltage across the
capacitor C reaches the avalanche threshold of
the Zener diode Z. Then, a current flows through
this Zener diode into the gate of the thyristor Th
which is triggered.
The AC voltage is rectified by the diode Ds.
The ignition energy is supplied by the mains
and stored into the capacitor C.
The thyristor turn on generates an alternating
current through the capacitor C. Its positive parts
flow through the capacitor C, the primary of the HV
transformer and the thyristor Th. Its negative parts
of the current flow through C, D and the primary of
the H.V transformer.
4/6
FLC21 FAMILY
RS RESISTANCE CALCULATION
requested cases. In worst cases, the system must
fire when the a.c. line voltage is minimum while the
breakdown voltage VBO and the current IBO of the
FLC are maximum.
The Rs resistance allows, in addition with the
capacitance C, to adjust the spark frequency and
to limit the current supplied by the mains. This
resistance allows the thyristor triggering in any
The maximum Rs value is equal to:
(VAC min. 2 ) − [VBO max .(1 + α T.( Tamb − 25 ))]
Rs max =
k . IBO
*
* : see fig 1
Fig. 4: Spark frequency versus Rs and C
FLC21-135A
FLC21-65A
F (Hz)
F (Hz)
Vdc=300V, Vbo=150V,Tamb=25°C
Vac=100Vrms, Vbo=75V, Tamb=25°C
50
50
30
20
30
20
10
10
10
12
15
18
22
27
33
39
47
10
12
15
18
22
27
33
39
47
Rs (kΩ )
Rs (kΩ )
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.
5/6
FLC21 FAMILY
PACKAGE MECHANICAL DATA
TO92 (Plastic)
DIMENSIONS
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
REF.
A
A
B
C
D
E
F
a
1.35
0.053
a
4.70
0.185
B
C
2.54
0.100
4.40
0.173
0.500
F
D
E
12.70
3.70
0.45
0.146
0.017
n
Epoxy meets UL94, VO at 1/8”
Type
Marking
FLC21-65A
FLC21-135A
Package
Weight
Base qty
2500
Delivery mode
Bulk
FLC21- 65A
FLC21-135A
TO-92
TO-92
0.200g
0.200g
2500
Bulk
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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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