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AN2744 датащи(PDF) 44 Page - STMicroelectronics

номер детали AN2744
подробное описание детали  ST7538Q power line FSK transceiver
PDF  56 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2744 датащи(HTML) 44 Page - STMicroelectronics

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The startup phase could also be critical for the SMPS as output overshoot occurs if the
circuit is not properly designed. Care must be taken in designing a proper clamp network in
order to prevent voltage spikes due to leakage inductance from exceeding the breakdown
voltage of the device (730 V minimum value).
The startup transient is shown in Figure 43. Note that the maximum drain-source voltage
doesn't exceed the minimum breakdown voltage BVDSS, with a reasonable safety margin.
Finally, load regulation is presented in Figure 42 and Figure 43 for different load conditions.
The voltage ranges from 10 V to 9.3 V, within the requested tolerance.
Figure 40.
Typical waveforms at 230 VAC: open
load
Figure 41.
Typical waveforms at 230 VAC: full
load
Ch1 Freq - 9.62kHz; Ch2 Mean - 9.90V
Ch1 Freq - 57.71kHz; Ch2 Mean - 13.79V; Ch4 Max -
503mA
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Figure 42.
Typical waveforms at 265 VAC:
short-circuit
Figure 43.
Typical waveforms at 265 VAC:
startup
Ch2 Freq - 23.50Hz; Ch4 Max - 2.08A; Ch4 Mean - 383mA
Ch1 Max - 702V; Ch2 Mean - 19.72V; Ch4 Max - 500mA
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