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AFE030 Datasheet(PDF) 33 Page - Texas Instruments |
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AFE030 Datasheet(HTML) 33 Page - Texas Instruments |
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33 / 58 page  + 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 AFE030 0.0 3.3 Time (5 ms/div) 0 50 100 350 0 -350 AFE030 www.ti.com SBOS588A – DECEMBER 2011 – REVISED DECEMBER 2011 For maximum protection of the AFE030 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 AFE030 can be configured for isolated zero crossing detection, as Figure 40 shows. Figure 40. Isolated Zero Crossing Detection Using the AFE030 Isolated zero crossing waveforms are shown in Figure 41. Figure 41. Isolated Zero Crossing Waveforms Copyright © 2011, Texas Instruments Incorporated 33 Product Folder Link(s): AFE030 |
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