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COMBOSOLAR 数据表(PDF) 32 Page - Texas Instruments

部件名 COMBOSOLAR
功能描述  Powerline Communications Analog Front-End
PDF  57 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

COMBOSOLAR 数据表(HTML) 32 Page - Texas Instruments

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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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