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AN4248 Datasheet(PDF) 41 Page - STMicroelectronics

Part # AN4248
Description  60 W PSU design details for water purifier system
PDF  46 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4248 Datasheet(HTML) 41 Page - STMicroelectronics

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DocID024214 Rev 1
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AN4248
Burst mode
19
Burst mode
Figure 38 and Figure 39 shows the operation of converter during no load conditions. When
there is very light load or no load at output, L6566B COMP pin voltage goes below 2.65 V,
the IC get disabled and power consumption goes is reduced. As soon as COMP pin voltage
rises above this threshold, the switching attempts takes place.
So during this conditions the input power from mains goes in range of mW. The AC input
power consumptions are mentioned below at extreme line operating conditions.
Figure 38. Burst mode operation at 100 Vac



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