LED Driver xppower.com LDU05/07/14 Series Constant Current Output LED Drive Current up to 1000 mA LED Strings from 2 V to 14 V PWM & Analog Dimming Control High Efficiency up to 93% Open or Short Circuit LED Protection 3 Year Warranty Specification Input General Input Voltage 7-16 VDC Efficiency See tables Input Filter Capacitor Switching Frequency LDU05: 60-300 kHz variable Input Surge 20 VDC for 0.5 s LDU07: 120-350 kHz variable LDU14: 90-400 kHz variable Output MTBF >3.3 MHrs to MIL-HDBK-217F at 25 C, GB Output Voltage See tables (Vin must be at least 2 V greater than Vout) Environmental Output Current See tables Output Current Trim 25-100% Operating Temperature -40 C to +85 C except LDU14 Output Current See tables 1000 mA unit: -40 C to +70 C, Accuracy Storage Temperature -40 C to +125 C Ripple & Noise See tables, Humidity Up to 95%, non-condensing measured with 20 MHz bandwidth Thermal Impedance 35 C/W model dependant Short Circuit Protection Current is limited to the rated output Temperature 0.03%/C max Coefficient EMC Remote On/Off On = 0.3-1.25 V or open circuit Emissions EN55022 class B conducted & radiated Off = 0.15 V (applied to control pin) with external components - see Quiescent input current is 25 A max, application notes Remote On/Off Signal 1 mA max ESD Immunity EN61000-4-2, level 2 Perf Criteria A Current Radiated Immunity EN61000-4-3, level 2 Perf Criteria A Dimming EFT/Burst EN61000-4-4, level 2 Perf Criteria A PWM Surge EN61000-4-5, level 2 Perf Criteria A Output Current Range 25% to 100% Conducted Immunity EN61000-4-6, level 2 Perf Criteria A Operating Frequency 1 kHz max On Time 200 ns min Off Time 200 ns min Amplitude 1.25 V max DC Voltage Control Output Current Range 25% to 100% Control Input 0.3 to 1.25 V max Variable Resistor Output Current Range 25% to 100% DC DCDC DC LDU05/07/14 Models and Ratings With Dimming Control Output Current Output Power Input Voltage Range Output Voltage Output Ripple & Noise Output Current Efficiency Model Number Accuracy 4.2 W 7-16 V 2-14 V 120 mV 300 mA 5% 93% LDU0516S300 4.9 W 7-16 V 2-14 V 150 mV 350 mA 6% 93% LDU0516S350 7.0 W 7-16 V 2-14 V 200 mV 500 mA 7% 93% LDU0716S500 8.4 W 7-16 V 2-14 V 200 mV 600 mA 7% 93% LDU1416S600 9.8 W 7-16 V 2-14 V 250 mV 700 mA 7% 93% LDU1416S700 14.0 W 7-16 V 2-14 V 250 mV 1000 mA 8% 93% LDU1416S1000 Mechanical Details 12.70 Pin Connections (0.50) 1 +V Input +DC supply 7.62 4 +V Output LED anode connection (0.30) 5 -V Output LED cathode connection 0.50 7 V Adj Dimming Control (0.02) 6.85 14 8 -V Input -DC supply 10.16 7.62 (0.27) Bottom View (0.40) (0.30) 3.05 Notes 857 (0.12) 1. All dimensions are in inches (mm) 2. Weight: 0.003 lbs (1.8 g) approx. 3. Pin diameter: 0.020.002 (0.50.05) 2.54 0.50 Pin Size is 0.5 mm (0.02) DIA 4. Pin pitch tolerance: 0.014 (0.35) (0.10) (0.02) 5. Case tolerance: 0.02 (0.5) Application Notes Output Current Adjustment by Variable Resistor Output Current Adjustment by DC Voltage By connecting a variable resistor between Control and GND, simple dimming can Control Voltage Range: 0.3 V to 1.25 VDC be achieved. Capacitor C is optional for HF noise rejection, recommended value is The output current is given by: Iout nom = Rated Max I x Control Voltage 0.22 F. 1.25 Rated Max I x R The output current can be determined using the equation: Iout = +Vout (R + 200 k) Control LDU Where the value of R is between 0 and 2 M , the maximum adjustment range of + -Vin output current is 25% to 90% (For Vin-Vout <20 VDC) +Vout -Vout Control LDU A Control Voltage lower than 0.15 V will turn the output off -Vin C R - Vout Shorting out the Control pin to GND will turn the output off. +Vout Output Current Adjustment by PWM PWM LDU Control 1.25V A Pulse Width Modulated (PWM) signal with duty cycle DPWM can be applied to the control pin. -Vin 0V The output current can be determined using the equation : Iout = Rated Max I x Dpwm GND Dpwm = PWM duty cycle - Vout Input Filter to meet Class B Conducted Emissions + +Vout + L1 C1 10 F LDU C2 4.7 F - C1 C2 L1 68 H - - Vout 21-Aug-14