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AN2929 датащи(PDF) 19 Page - STMicroelectronics |
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AN2929 датащи(HTML) 19 Page - STMicroelectronics |
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19 / 32 page ![]() AN2929 Testing the board Doc ID 15333 Rev 2 19/32 Figure 18. Input power vs. input voltage for different loads Figure 19. Average switching frequency vs. input voltage Depending on the equipment supplied, we can have several criteria to measure the standby or light-load performance of a converter. One criterion is the measure of the output power when the input power is equal to one watt. Table 16 gives the output power needed to have 1 W of input power in different line conditions and Figure 20 illustrates this. AM02173v1 0 1 2 3 4 80 120 160 200 240 280 V INAC F SW_AVG (kHZ) 25 mW 0 mW 50mW POUT |
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