TEA1024/ TEA1124
Zero Voltage Switch with Fixed Ramp
Description
The monolithic integrated bipolar circuit, TEA1024/
TEA1124 is a zero voltage switch for triac control in
domestic equipments. It offers not only the control of a
triac in zero crossing mode but also the possibility of
power control. This is why the IC contains a mains
synchronized ramp generator with 640 ms (1280 ms)
duration (50 Hz). It is suitable for a typical load of 750 W
(1000 W) meeting the Flicker Standard. (values in
brackets relate to TEA1124.)
Features
D
D
D
D
D
D
Direct supply from the mains
Definite IC switching characteristics
Very few external components
Full wave drive – no dc component in the load circuit
Current consumption
≤
1.5 mA
Output short circuit protected
Package:
DIP8
D
D
D
D
Simple power control
Integrated ramp generator
Reference voltage variable by external resistance
Pulse position optimization
Block Diagram
95 10871
D
1
390 k
W
R
2
(R
sync
)
R
1
1N4007
22 k
W
/
2W
Load
1000 W
L
7
1
56 k
W
Ramp generator
TEA 1024 – 640 ms
TEA 1124 – 1280 ms
4
6
C
1
100
m
F
16 V
TIC
236N
V
M
=
230 V ~
Sync. logic
Supply
MT2
MT1
Comparator
Protection
min.
100 k
W
max.
2
43 k
W
NC
+
–
3
NC
8
Pulse
amplifier
5
R
G
68
W
N
Figure 1. Typical block diagram – open loop power control
TELEFUNKEN Semiconductors
Rev. A1, 24-May-96
1 (8)
TEMIC [ TEMIC SEMICONDUCTORS ]
