參數(shù)資料
型號(hào): FLC21
廠商: 意法半導(dǎo)體
英文描述: LOW POWER FIRE LIGHTER CIRCUIT
中文描述: 低功耗電路消防打火機(jī)
文件頁(yè)數(shù): 5/6頁(yè)
文件大小: 45K
代理商: FLC21
FLC21 FAMILY
5/6
RS RESISTANCE CALCULATION
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
requested cases. In worst cases, the system must
fire when thea.c. linevoltage is minimumwhile the
breakdown voltage V
BO
and the current I
BO
of the
FLC are maximum.
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
10
12
15
18
22
27
33
39
47
10
20
30
50
F (Hz)
Rs (k )
Vac=100Vrms, Vbo=75V,Tamb=25
°
C
μ
μ
C=1 F
μ
μ
C=1.5 F
C=2.2 F
C=2.7 F
μ
C=3.3 F
μ
FLC21-65A
10
12
15
18
22
27
33
39
47
10
20
30
50
FLC21-135A
Vdc=300V Vbo=150VTamb=25
°
C
F (Hz)
Rs (k )
C=3.3 F
μ
C=2.7 F
μ
C=2.2 F
μ
μ
C=1 F
μ
μ
C=1.5 F
Fig. 4:
Spark frequency versus Rs and C
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.
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