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AN4346 Datasheet(PDF) 29 Page - STMicroelectronics

No. de pieza AN4346
Descripción Electrónicos  10 W wide range - high power factor - isolated LED driver using HVLED815PF
PDF  33 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4346 Datasheet(HTML) 29 Page - STMicroelectronics

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AN4346
Electrical waveform
33
3.6
OVP protection to a load disconnection
During a load disconnection the HVLED815PF device senses the output voltage through the
DMG pin and controls the voltage loop in order to regulate the output capacitor voltage to
a level below its maximum rating.
As shown in Figure and Figure 44 the converter works in burst mode during no load
condition.
Figure 41. Load disconnection at 100 Vac -
50 Hz
Figure 42. No load behavior at 100 Vac - 50 Hz
CH1: DRAIN pin
CH2: IOUT
CH3: VOUT
CH4: DMG pin
CH1: DRAIN pin
CH2: IOUT
CH3: VOUT
CH4: DMG pin
Figure 43. Load disconnection at 230 Vac
- 50 Hz
Figure 44. No load behavior at 230 Vac - 50 Hz
CH1: DRAIN pin
CH2: IOUT
CH3: VOUT
CH4: DMG pin
CH1: DRAIN pin
CH2: IOUT
CH3: VOUT
CH4: DMG pin



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