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KDR412 датащи(PDF) 5 Page - KEC(Korea Electronics) |
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KDR412 датащи(HTML) 5 Page - KEC(Korea Electronics) |
5 / 7 page 2007. 2. 26 5/7 KAB3403T/DN Revision No : 0 4. Using a Logic Signal to FB pin. For application that need to adjust the LED current in discrete steps. A logic signal can be used as shown in Figure 9. Figure9. Using a Logic Signal to FB pin. VCC VIN GND SW C1 C2 R1 R2 D1 CTL FB OVD 1 µF 1 µF LED1 LED2 LED3 LED4 L1 4.7 µH ~ 22µH L1 4.7 µH ~ 22µH SW C1 1 µF C2 1 µF D1 CTL FB OVD LED1 LED2 LED3 LED4 GND VCC VIN R1 16 Ω DC KAB3403T/DN VCC VIN GND SW C3 C2 R1 1 5kΩ D1 CTL FB OVD 1 µF 1 µF LED1 LED2 LED3 LED4 PWM Signal L1 4.7 µH ~ 22µH C1 1 µF KAB3403T/DN KAB3403T/DN VCC VIN GND SW C1 C2 R1 D1 CTL FB OVD 1 µF 1 µF LED1 LED2 LED3 LED4 KTK5132V LOGIC L1 4.7 µH ~ 22µH KAB3403T/DN Figure6. Using a DC Signal to CTL pin. 2. Using a filtered PWM Signal to CTL pin. The filtered PWM signal can be considered as an adjustable DC voltage. It can be used to replace the variable DC Voltage source in dimming control. The circuit is shown in Figure 7 Figure7. Using a filtered PWM Signal to CTL pin. 3. Using a DC Voltage to FB pin. The dimming control using a DC control voltage to FB pin of the KAB3403T/DN is shown in Figure. The LED current can be varied applying a DC voltage to the FB pin. The voltage can come from a filtered PWM signal. It can be used to replace the variable DC voltage source in dimming control. |
Аналогичный номер детали - KDR412 |
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Аналогичное описание - KDR412 |
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