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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MIC2845 датащи(PDF) 13 Page - Micrel Semiconductor |
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MIC2845 датащи(HTML) 13 Page - Micrel Semiconductor |
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13 / 21 page  Micrel Inc. MIC2845/46 January 2008 13 M9999-010808-A Application Information MIC2845 PWM Dimming Interface The MIC2845 can receive PWM signals from the END pin for WLED dimming. The frequency of the PWM signal should be between 200Hz – 1kHz and the duty cycle can range from 1% to 100%. Dimming is generated by pulsing the WLEDs on and off in synchronization with the PWM signal. An internal shutdown delay ensures that the internal control circuitry remains active during PWM dimming for optimum performance. Figure 4 through Figure 8 show the WLED current response when a PWM signal is applied to the END pin. Figure 4. PWM Signal at 1% Duty Cycle Figure 5. PWM Signal at 20% Duty Cycle Figure 6. PWM Signal at 50% Duty Cycle Figure 7. PWM Signal at 80% Duty Cycle Figure 8. PWM Signal at 100% Duty Cycle |
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