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AN3203 Datasheet(PDF) 13 Page - STMicroelectronics

Part # AN3203
Description  This application note describes the characteristics and performance
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3203 Datasheet(HTML) 13 Page - STMicroelectronics

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AN3203
Asymmetrical half bridge operation
Doc ID 17402 Rev 2
13/49
The signal HVG is the sum of the half bridge node (FGND pin of L6591) and the high side
gate driver voltages. This peculiarity allows both waveforms and the ZVS operation for the
high side MOSFET to be checked. The driver activation is visible on the HVG signal when
there is a small voltage step on the high part of the waveform.
Figure 7.
AHB zero voltage switching detail @ full load
Ch1: LVG pin voltage (yellow)
Ch3: HVG pin voltage (purple)
Ch4: Primary winding current (green)



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