參數(shù)資料
型號: FLC10-200B
廠商: 意法半導(dǎo)體
英文描述: FIRE LIGHTER CIRCUIT
中文描述: 消防打火機(jī)電路
文件頁數(shù): 4/8頁
文件大小: 122K
代理商: FLC10-200B
FLC10-200H/B
4/8
Rs
Ds
c
D
Th
Z
R
Ic
AC
MAINS
Ic
t
Fig. 2:
BASIC APPLICATION
The applications of the lighter using the capaci-
tance 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.
The maximum Rs value is equal to :
Rs
V
(
V
[
T
T
k
I
AC
BO
amb
BO
max
min.
)
max .(
.
.(
))]
*
=
+
2
1
25
α
* : see fig 1
COMPONENT CHOICE
RS RESISTOR CALCULATION
The Rs resistor allows, in addition with the capacitor C, the spark frequency to be adjusted and the cur-
rent from the mains to be limited. Its value shall allow the thyristor Th to fire even in worst case condi-
tions. 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.
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