DCDC LED Driver LDU56 Series xppower.com • Constant Current Output • LED Drive Current up to 1000 mA • LED Strings from 2 V to 56 V • PWM Dimming Control • High Efficiency up to 97% • Open or Short Circuit LED Protection • 3 Year Warranty Specification Input Input Voltage Input Filter Input Surge General • 9-60 VDC • Capacitor • 65 VDC for 500 ms Efficiency Switching Frequency MTBF Output Output Voltage Output Current Output Current Accuracy Ripple & Noise • 2-56 V (Vin must be at least 4 V greater than Vout) • See tables • See tables • See tables, measured with 20 MHz bandwidth Short Circuit Protection • Current is limited to the rated output Capacitive Load • 2.2 µF max Temperature • ±0.03%/°C max Coefficient Remote On/Off • On = 2.5-5.0 V or open circuit Off = ≤0.8 V (applied to control pin) Quiescent input current is 3 mA max, Remote On/Off Signal • 1 mA max Current Dimming PWM Output Current Range Operating Frequency On Time Off Time Amplitude • • • • • 1% to 100% 1 kHz max 50 µs min 50 µs min 2.5 V, 5 V max • See tables • 40-1000 kHz variable • >2.0 MHrs to MIL-HDBK-217F at 25 °C, GB Environmental Operating Temperature • -40 °C to +85 °C for 300/350 mA versions, -40 °C to +70 °C for others Storage Temperature • -40 °C to +125 °C Humidity • Up to 95%, non-condensing Thermal Impedance • 16.7 °C/W model dependant EMC Emissions ESD Immunity Radiated Immunity EFT/Burst Conducted Immunity Magnetic Field • EN55015 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 • EN61000-4-6, level 2 Perf Criteria A • EN61000-4-8, level 2 Perf Criteria A With Dimming Control Output Power 16.8 19.6 28.0 33.6 39.2 50.0 Input Voltage Range W W W W W W 9-60 9-60 9-60 9-60 9-60 9-60 Output Voltage V V V V V V 2-56 2-56 2-56 2-56 2-56 2-56 Output Ripple & Noise V V V V V V 250 300 350 400 400 450 Output Current mV mV mV mV mV mV 300 350 500 600 700 1000 mA mA mA mA mA mA Output Current Accuracy Efficiency ±6% ±5% ±5% ±5% ±5% ±5% Model Number(1) 97% 97% 97% 97% 97% 97% LDU5660S300 LDU5660S350 LDU5660S500 LDU5660S600 LDU5660S700 LDU5660S1000 1. Add suffix ‘-W’ for wired version, e.g. LDU5660S500-W, or ‘-WD’ for wired version with dimming function e.g. LDU5660S500-WD. Mechanical Details LDU56 24 Pin DIL LDU56 Wired versions 1.25 (31.75) 0.90 (22.86) 2 3 0.60 (15.24) 1.25 (31.75) 0.80 (20.32) 4 9 0.80 (20.32) Bottom View 23 22 16 1 0.12 (3.05) 12 5 11 0.49 (12.45) 0.80 (20.32) Bottom View 0.49 (12.45) 24 13 24 5 1 12 13 14 0.60 (15.24) 0.10 (2.54) 3.94 (100.0) DIA. 0.02 (0.50) 3.94 (100.0) 0.39 (10.0) LDU56 2&3 4 9 & 11 14 & 16 22 & 23 0.49 (12.45) Stripped & tinned LDU56 Connections LDU56-W LDU56-WD Function -Vin: -DC supply 1 (Black) 1 (Black) Control No Wire 5 (White) -Vout: LED cathode connection 12 (Blue) 12 (Blue) 13 (Yellow) 13 (Yellow) +Vout: LED anode connection +Vin: +DC supply 24 (Red) 24 (Red) Note: Do not connect pins 2 & 3 (-Vin) to pins 9 & 11 (-Vout) Notes 1. All dimensions are in inches (mm) 2. Weight: LDU56 - 0.04 lbs (17.7 g) approx. LDU56 (wired version) - 0.05 lbs (22.0 g) approx. 3. Pin diameter: 0.02±0.002 (0.5±0.05) 4. Pin pitch & length tolerance: ±0.014 (±0.35) 5. Case tolerance: ±0.02 (±0.5) Application Notes Output Current Adjustment by PWM +Vout A Pulse Width Modulated (PWM) signal with duty cycle DPWM can be applied to the control pin. PWM 5.0V Control LDU -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 +Vin +Vout L1 +LED C1 LDU56 C3 C1 C2 -Vin -Vout +Vin +Vout L1 C1 2220,475K,100V,X7R 2220,475K,100V,X7R LDU5660Sxxx-WD 2220,475K,100V,X7R 2220,475K,100V,X7R C2 -Vout C3 100 µF/100 V +LED C1 -Vin L 68 µH GND LDU56-WD C3 C2 LDU5660Sxxx C2 L1, L2 C3 47 µH 100 µF/100 V GND L2 29-Oct-13 DCDC LDU56 Models and Ratings