TEA1024

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 D1 390 kW R2 (Rsync) R1 1N4007 22 kW/ 2W Load 1000 W L 7 1 56 kW Ramp generator TEA 1024 – 640 ms TEA 1124 – 1280 ms 4 6 C1 100 mF 16 V TIC 236N V M= 230 V ~ Sync. logic Supply MT2 MT1 Comparator Protection min. 100 kW max. 2 43 kW NC + – 3 NC 8 Pulse amplifier 5 RG 68 W N Figure 1. Typical block diagram – open loop power control TELEFUNKEN Semiconductors Rev. A1, 24-May-96 1 (8) TEA1024/ TEA1124 Power Supply and its Limitations The voltage limitation contained in the IC allows it to be powered from mains via series resistance R1 and recti– fyin...