参数资料
型号: T2117-TA
厂商: ATMEL CORP
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO8
封装: SO-8
文件页数: 5/11页
文件大小: 71K
代理商: T2117-TA
T2117
Rev. A1, 28-Sep-00
3 (11)
whereby:
IL
=
Latching current of the triac
VM
=
Mains supply, effective
P
=
Power load (user’s power)
Total current consumption is influenced by the firing
pulse width which can be calculated as follows:
Rsync
+
V
M
2 sin (
w
tp
2 ) * 0.6 V
3.5
10 * 5A
* 49 kW
0.01
0.10
1.00
10.00
10
100
1000
10000
t
(
ms
)
P ( W )
p
IL ( mA)
100
200
50
VMains = 230 V
Figure 5. Output pulse width
0
400
800
1200
1600
2000
0
200
400
600
800 1000 1200 1400
Rsync
(
kOhm
)
tp (
ms )
VMains = 230 V
Figure 6. Synchronization resistance
Supply Voltage
The T2117 contains voltage limiting and can be con-
nected with the mains supply via the diode D1 and the
resistor R1. Supply voltage between Pin 5 and 7 is limited
to a typical value of 9.5 V.
The series resistance R1 can be calculated (figures 7
and 8) as follows:
R1max = 0.85
VMmin – VSmax
2 Itot
; P(R1) =
(VM – VS)2
2 R1
Itot
= IS + IP + Ix
whereby:
VM
= Mains voltage
VS
= Limiting voltage of the IC
Itot
= Total current consumption
IS
= Current requirement of the IC (without load)
Ix
= Current requirement of other peripheral
components
P(R1) = Power dissipation at R1
0
369
12
0
10
20
30
40
50
R
(
k
)
1
Itot ( mA )
15
VMains=230VX
W
Figure 7. Maximum resistance of R1
0
369
12
0
Itot ( mA )
15
VMains=230VX
1
2
3
4
6
P
(
W
)
5
R1
Figure 8. Power dissipation of R1
according to current consumption
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