TEA1024 Temic Semiconductors (acquired by ATMEL Corporation), TEA1024 Datasheet - Page 4

• Manufacturer Part Number: TEA1024
• Description: Zero Voltage Switch With Fixed RAMp
• Manufacturer: Temic Semiconductors (acquired by ATMEL Corporation)

Ignition (Firing) Current
The necessary ignition current depends on the specified
triac. With the help of a resistance, it is possible to limit
its value:
R
I
TEA1024/ TEA1124
whereas V
4 (8)
p
Gmax
[A]
96 11939
95 11
[
+
10.00
W
1.00
0.10
0.01
2.5
1.5
0.5
]
2
1
0
I
I
I
t
T s = Duration (of mains frequency)
[
Gmax
P
10
G
P
T
0
G
A = Average gate current requirement
s = Ignition pulse width
A = Max. gate current
5.7 V – V
V = Gate voltage of the triac
200
V
t
I
p
Mains
Gmax
100
=230V
Figure 6.
Figure 7.
V
Gmax
400
mains
t
P ( W )
X
–25
p
= 230 V
(
m
1000
s )
600
W
I
L
( mA)
100
200
50
800
10000
1000
Supply Voltage
Due to higher trigger sensitivity of the triac it is supplied
with negative signal. It can be supplied via diode and
series resistance from the negative half wave of the mains.
An internal parallel controller limits the voltage between
Pin 5 and 7 to a typical value of 6.55 V.
Dimensioning of the Series Resistance
R
R
I
tot
1
95 10114
95 10116
1max
+
(Figures 8, 9)
+
I
50
40
30
20
10
S
0
6
5
4
3
2
1
0
V
V
I
I
)
0.85
tot
x
M
S
0
0
I
P
)
= Mains supply
= Limiting voltage of the IC
= Total current requirement
= Current requirement for external circuit
V
Mmin
V
I
3
3
Mains
X
2 I
TELEFUNKEN Semiconductors
– V
=230V
Figure 8.
Figure 9.
tot
6
6
Smax
I
I
tot
tot
P(R
X
( mA )
( mA )
–65
V
1
)
Mains
9
9
+
Rev. A1, 24-May-96
W
=230V
(V
M
12
12
2 R
– V
X
1
S
)
15
15
2