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AFE032 Datasheet(PDF) 24 Page - Texas Instruments |
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AFE032 Datasheet(HTML) 24 Page - Texas Instruments |
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24 / 77 page  0 3.3 Time (5 ms/div) 0 50 100 350 0 -350 + 120 VAC to 240 VAC 50 Hz to 60 Hz PS2505-1A Opto Isolator or Equivalent AVDD 3.3 V ZC_IN ZC_OUT AVDD AGND Zero-Crossing Inside the Device AFE032 SBOS669A – AUGUST 2013 – REVISED DECEMBER 2013 www.ti.com Schottky diodes are recommended (see Figure 18) for maximum device protection from line transients. These diodes limit the ZC_IN pins (pins 32, 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 AFE032 can be configured for isolated zero-crossing detection, as shown in Figure 20. Figure 20. Isolated Zero-Crossing Detection Using the AFE032 Isolated zero-crossing waveforms are shown in Figure 21. Figure 21. Isolated Zero-Crossing Waveforms 24 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: AFE032 |
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