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AN4248 Datasheet(PDF) 27 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) 27 Page - STMicroelectronics

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AN4248
Functional check
15
Functional check
The flyback waveforms are analyzed (refer to Figure 16 through Figure 31) during steady-
state operation of the SMPS. The waveforms are captured at different load conditions -
25%, 50%, 75% and 100% at different operating mains voltage, starting from 100 Vac to 265
Vac.
Note:
CH1: drain current; CH2: Vcc voltage; CH3: COMP Pin; CH4: drain-source voltage.
Figure 16. Condition 1: Vac = 100 V; Iout = 0.6 A



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