COMBOSOLAR datasheet(31/57 Pages) TI1

31 / 57 page

0.0

3.3

Time (5 ms/div)

100

350

-350

330 kW

120 VAC

to 240 VAC

50/60 Hz

ZLLS410 or

equivalent

ZLLS410 or

equivalent

AVDD

3.3 V

OUT

AGND

Zero

Crossing

Inside the AFE031

AFE031

www.ti.com

SBOS531D – AUGUST 2010 – REVISED MAY 2012

Zero Crossing Detector Block

The AFE031 includes two zero crossing detectors. Zero crossing detectors can be used to synchronize

communications signals to the ac line or sources of noise. Typically, in single-phase applications, only a single

zero crossing detector is used. In three-phase applications, both zero crossing detectors can be used; one

component detects phase A, and one detects phase B. Phase C zero crossings can then be inferred from the

data gathered from the other phases. Figure 38 shows the AFE031 configured for non-isolated zero crossing

detection.

Figure 38. Non-Isolated Zero Crossing Detection Using the AFE031

Non-isolated zero crossing waveforms are shown in Figure 39.

Figure 39. Non-Isolated Zero Crossing Waveforms

Product Folder Link(s): AFE031

COMBOSOLAR 数据表(PDF) 31 Page - Texas Instruments

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