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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UM0670 датащи(PDF) 21 Page - STMicroelectronics |
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UM0670 датащи(HTML) 21 Page - STMicroelectronics |
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21 / 43 page  Measurement UM0670 21/43 Doc ID 15327 Rev 2 Figure 16. Output LED current for different LED voltage (ILED = 700 mA) Figure 17 shows the output LED current waveform for the output LED current of 1000 mA. The current ripple is 433 mA and the switching frequency for the modified buck converter is 55 kHz. The input voltage was 230 VAC and 4 LEDs were used as the load (OSTAR LED LE UW E3B see Section 11: References and related materials: 6). The output LED current accuracy for the different LED voltages is shown in Figure 18. Figure 17. Output LED current waveform (ILED = 1000 mA) AM00404 VLED v s. ILED for nominal LED current 700 mA 0 100 200 300 400 500 600 700 800 82 101 121 139 LED voltage [V] LED current [mA] 700 mA |
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