T2117 ATMEL Corporation, T2117 Datasheet - Page 3

• Manufacturer Part Number: T2117
• Description: Standard Zero Crossing Switch, Low-cost Application
• Manufacturer: ATMEL Corporation

whereby:
I
V
P
Total current consumption is influenced by the firing
pulse width which can be calculated as follows:
Supply Voltage
The T2117 contains voltage limiting and can be con-
nected with the mains supply via the diode D
resistor R
to a typical value of 9.5 V.
Rev. A2, 17-Dec-01
L
M
R
sync
2000
1600
1200
10.00
=
=
=
800
400
1.00
0.10
0.01
+
0
1
10
. Supply voltage between Pin 5 and 7 is limited
V
0
Figure 6. Synchronization resistance
M
Latching current of the triac
Mains supply, effective
Power load (user’s power)
Figure 5. Output pulse width
200
2 sin (w
3.5
400
100
V
Mains
V
Mains
10
600
= 230 V
tp ( ms )
t p
2
* 5
P ( W )
= 230 V
) * 0.6 V
A
800 1000 1200 1400
1000
I
L
( mA)
100
200
50
* 49 kW
10000
1
and the
The series resistance R
and 8) as follows:
I
whereby:
V
V
I
I
I
P
R
tot
tot
S
x
(R1)
M
S
1max
= I
= Mains voltage
= Limiting voltage of the IC
= Total current consumption
= Current requirement of the IC (without load)
= Current requirement of other peripheral
= Power dissipation at R
= 0.85
50
40
30
20
10
components
0
6
5
4
3
2
1
0
S
0
0
+ I
Figure 7. Maximum resistance of R
Figure 8. Power dissipation of R
according to current consumption
P
V
+ I
2 I
Mmin –
3
3
x
V
tot
Mains
V
1
=230VX
Smax
6
6
can be calculated (figures 7
I
I
tot
tot
V
( mA )
( mA )
Mains
; P
1
(R1)
9
9
=230VX
=
T2117
12
12
(V
1
1
2 R
M –
1
15
15
V
3 (11)
S
)
2