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AN2708 Datasheet(PDF) 37 Page - STMicroelectronics

Part # AN2708
Description  2X36 W digital dimmable ballast with L6574 and ST7FDALI
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2708 Datasheet(HTML) 37 Page - STMicroelectronics

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AN2708
DALI master AC-DC adapter
37/42
At minimum load the VIPer12A-E ensures the burst mode operation, saving the input power
consumption.
5.3.2
Startup behavior
Figure 31, 32, 33, and 34 show the typical waveforms during the startup of the power supply.
In particular, the full load condition is considered since it represents the heaviest case in
terms of voltage and current stress, as well as the minimum load condition for loop stability
and voltage stress.
Figure 31.
Startup waveforms at full load
at 110 Vac - 60 Hz
Figure 32.
Startup waveforms at full load
at 230 Vac - 50 Hz
CH1 (blue): drain voltage
CH2 (red): 5 Vout
CH3 (green): 20 Vout
CH4 (purple): drain current
CH1 (blue): drain voltage
CH2 (red): 5 Vout
CH3 (green): 20 Vout
CH4 (purple): drain current



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