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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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VIPER38LD Datenblatt(PDF) 19 Page - STMicroelectronics |
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VIPER38LD Datenblatt(HTML) 19 Page - STMicroelectronics |
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19 / 31 page  DocID025703 Rev 2 19/31 VIPER38 Operation 31 Where: • VOVP is the OVP threshold (see Table 8: Controller section) • VOUT OVP is the converter output voltage value to activate the OVP set by the designer • NAUX is the number of the auxiliary winding turns • NSEC is the number of the secondary winding turns • VDSEC is the secondary diode forward voltage • VDAUX is the auxiliary diode forward voltage • ROVP together with RLIM constitute the output voltage divider Then, fixing RLIM according to the desired IDlim, the ROVP can be calculated by: Equation 4 The resistor values will be such that the current sourced and sunk by the CONT pin are within the rated capability of the internal clamp. Figure 21. OVP timing diagram R OVP R LIM 1k OVP – k OVP ----------------------- × = |
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