DCDC LED Driver LDU05/07/14 Series xppower.com • 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 Input Voltage Input Filter Input Surge General • 7-16 VDC • Capacitor • 20 VDC for 0.5 s Output Output Voltage Output Current Output Current Trim Output Current Accuracy Ripple & Noise Efficiency Switching Frequency MTBF • See tables (Vin must be at least 2 V greater than Vout) • See tables • 25-100% • See tables • See tables, measured with 20 MHz bandwidth Short Circuit Protection • Current is limited to the rated output Temperature • ±0.03%/°C max Coefficient Remote On/Off • On = 0.3-1.25 V or open circuit Off = ≤0.15 V (applied to control pin) Quiescent input current is 25 µA max, Remote On/Off Signal • 1 mA max Current Dimming PWM Output Current Range Operating Frequency On Time Off Time Amplitude • • • • • DC Voltage Control Output Current Range Control Input • 25% to 100% • 0.3 to 1.25 V max Variable Resistor Output Current Range • 25% to 100% 25% to 100% 1 kHz max 200 ns min 200 ns min 1.25 V max • See tables • LDU05: 60-300 kHz variable LDU07: 120-350 kHz variable LDU14: 90-400 kHz variable • >3.3 MHrs to MIL-HDBK-217F at 25 °C, GB Environmental Operating Temperature • -40 °C to +85 °C except LDU14 1000 mA unit: -40 °C to +70 °C, Storage Temperature • -40 °C to +125 °C Humidity • Up to 95%, non-condensing Thermal Impedance • 35 °C/W model dependant EMC Emissions ESD Immunity Radiated Immunity EFT/Burst Surge Conducted Immunity • EN55022 class B conducted & radiated with external components - see application notes • EN61000-4-2, level 2 Perf Criteria A • EN61000-4-3, level 2 Perf Criteria A • EN61000-4-4, level 2 Perf Criteria A • EN61000-4-5, level 2 Perf Criteria A • EN61000-4-6, level 2 Perf Criteria A With Dimming Control Output Power Input Voltage Range Output Voltage Output Ripple & Noise Output Current Output Current Accuracy Efficiency Model Number 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 (0.50) 7.62 (0.30) 10.16 (0.40) 7.62 (0.30) 1 0.50 (0.02) 4 Bottom View 8 2.54 (0.10) 6.85 (0.27) 3.05 ( 0.12) 5 7 1 4 5 7 8 +V Input +V Output -V Output V Adj -V Input Pin Connections +DC supply LED anode connection LED cathode connection Dimming Control -DC supply Notes 0.50 (0.02) 1. 2. 3. 4. 5. Pin Size is 0.5 mm (0.02”) DIA All dimensions are in inches (mm) Weight: 0.003 lbs (1.8 g) approx. Pin diameter: 0.02±0.002 (0.5±0.05) Pin pitch tolerance: ±0.014 (±0.35) 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 be achieved. Capacitor C is optional for HF noise rejection, recommended value is 0.22 µF. Control Voltage Range: 0.3 V to 1.25 VDC The output current can be determined using the equation: Iout = The output current is given by: Iout nom = Rated Max I x Control Voltage 1.25 Rated Max I x R +Vout (R + 200 k) LDU Control + Where the value of R is between 0 and 2 MΩ, the maximum adjustment range of output current is 25% to 90% (For Vin-Vout <20 VDC) -Vin +Vout Control -Vout 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 A Pulse Width Modulated (PWM) signal with duty cycle DPWM can be applied to the control pin. 5.0V 0V PWM Control LDU -Vin 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 + L1 C1 C2 + - +Vout LDU C1 10 µF C2 4.7 µF L1 68 µH - Vout 14-Mar-12 DCDC LDU05/07/14 Models and Ratings