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COMBOSOLAR Datasheet(PDF) 32 Page - Texas Instruments |
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COMBOSOLAR Datasheet(HTML) 32 Page - Texas Instruments |
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32 / 57 page  0.0 3.3 Time (5 ms/div) 0 50 100 350 0 -350 + 120 VAC to 240 VAC 50/60 Hz PS2505-1A Opto Isolator or equivalent AVDD 3.3 V ZC IN ZC OUT AV DD AGND Zero Crossing Inside the AFE031 AFE031 SBOS531D – AUGUST 2010 – REVISED MAY 2012 www.ti.com For maximum protection of the AFE031 against line transients, it is recommended to use Schottky diodes as indicated in Figure 38. These diodes should limit the ZC_IN pins (pins 38 and 39) to within the maximum rating of (AVDD + 0.4 V) and (AGND – 0.4 V). Some applications may require an isolated zero crossing detection circuit. With a minimal amount of components, the AFE031 can be configured for isolated zero crossing detection, as Figure 40 shows. Figure 40. Isolated Zero Crossing Detection Using the AFE031 Isolated zero crossing waveforms are shown in Figure 41. Figure 41. Isolated Zero Crossing Waveforms 32 Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Link(s): AFE031 |
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