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LDU2430S1000-W 데이터시트(PDF) 4 Page - XP Power Limited |
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LDU2430S1000-W 데이터시트(HTML) 4 Page - XP Power Limited |
4 / 4 page 21-Aug-14 + - + - +Vout - Vout C2 C3 C1 L1 LDU Input Filter to meet Class B Conducted Emissions +Vout - Vout Control LDU -Vin LDU +Vout - Vout -Vin GND PWM 0V 1.25V Control LDU08 48 By connecting a variable resistor between control and GND, simple dimming can be achieved. Capacitor is optional for HF noise rejection. Recommended value is 0.22 µF. The output current can be determined using the equation: Where the value of R is between 0 and 2 M Ω,the maximum adjustment range of output current is 25% to 90% (For Vin-Vout, LDU08 & 24: <20 VDC, LDU48: <30 VDC ) Output Current Adjustment by Variable Resistor Output Current Adjustment by DC Voltage Output Current Adjustment by PWM Directly driving control input A Pulse Width Modulated (PWM) signal with duty cycle DPWM can be applied to the control pin, as shown: Application Notes LDU Control +Vout -Vout + -Vin The output current is given by: Control Voltage Range: 0.3 V to 1.25 VDC Iout = Iout nom x Control Iout = Iout nom x Dpwm (Dpwm = PWM duty cycle) LDU08 LDU24 LDU48 C1 10 µF 10 µF 4.7 µF C2 Not Fitted Not Fitted 4.7 µF C3 47 µF 47 µF Not Fitted L1 68 µH 68 µH 47 µH Iout = Iout nom x R (R + 200 k) Iout = For LDU48 For LDU08-24 Iout nom x R (R + 50 k) 1.25 |
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