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LM3445MM Datasheet(PDF) 11 Page - Texas Instruments |
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LM3445MM Datasheet(HTML) 11 Page - Texas Instruments |
11 / 42 page delay VBUCK VAC VBR1 t ? (a) (b) (c) t t VAC VBR1 t (a) (b) (c) VBUCK LM3445 www.ti.com SNVS570M – JANUARY 2009 – REVISED NOVEMBER 2015 Feature Description (continued) 7.3.3 Sensing the Rectified TRIAC Waveform A bridge rectifier, BR1, converts the line (mains) voltage (Figure 12c) into a series of half-sines as shown in Figure 12b. Figure 12a shows a typical voltage waveform after diode D3 (valley fill circuit, or VBUCK). Figure 12. Voltage Waveforms After Bridge Rectifier Without TRIAC Dimming Figure 13c and Figure 13b show typical TRIAC dimmed voltage waveforms before and after the bridge rectifier. Figure 13a shows a typical TRIAC dimmed voltage waveform after diode D3 (valley fill circuit, or VBUCK). Figure 13. Voltage Waveforms After Bridge Rectifier With TRIAC Dimming Copyright © 2009–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM3445 |
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