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AN1902 데이터시트(PDF) 23 Page - STMicroelectronics

부품명 AN1902
상세설명  DEVICES TO DRIVE 58W TL TUBES
PDF  32 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1902 데이터시트(HTML) 23 Page - STMicroelectronics

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AN1902 - APPLICATION NOTE
Figure 25: Start-up phase
Figure 26: First oscillation cycles after the diac strike
4.4.2 PRE-HEATING PHASE
The preheating frequency has to be fixed in order to reach a current level enough to heat the cathodes
without tube ignition. Figure 27 shows the main waveforms of the LS device.
LS DIAC pin voltage
LS VCC pin voltage
LS VCC pin voltage
Mid point voltage
LS collector current
LS DIAC pin voltage



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