DCDC LED Driver LDU Series xppower.com • Constant Current Output • LED Drive Current up to 1000 mA • LED Strings from 2 V to 57 V • PWM & Analog Dimming Control • High Efficiency up to 95% • Open or Short Circuit LED Protection • 3 Year Warranty Specification Input Input Voltage Input Filter Input Surge General • LDU08 & 24: 7-30 VDC LDU48: 7-60 VDC • Capacitor • LDU08 & 24: 40 VDC for 0.5 s LDU48: 65 VDC for 0.5 s Efficiency Switching Frequency MTBF Output • See tables (Vin must be at least 2 V greater than Vout) Output Current • See tables Output Current Trim • 25-100% Output Current • LDU08: ±6.0% max Accuracy LDU24: ±8.0% max LDU48: ±8.0% max Ripple & Noise • LDU08: 200 mV pk-pk max LDU24: 250 mV pk-pk max (except 1000 mA units: 300 mV pk-pk max) LDU48: See tables measured with 20 MHz bandwidth Short Circuit Protection • Current is limited to the rated output Temperature • LDU08: ±0.03%/°C max Coefficient LDU24: ±0.08%/°C max LDU48: ±0.03%/°C max Remote On/Off • On = 0.3-1.25 V or open circuit Off = ≤0.15 V (applied to control pin) LDU08 & 24: Quiescent input current is 25 µA max, LDU48: Quiescent input current is 100 µA max Remote On/Off Signal • 1 mA max Current Output Voltage 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 • LDU08: 40-380 kHz variable LDU24: 50-330 kHz variable LDU48: 20-500 kHz variable • LDU08: >1.6 MHrs LDU24: >1.6 MHrs LDU48: >950 KHrs to MIL-HDBK-217F at 25 °C, GB Environmental Operating Temperature • LDU08: -40 °C to +85 °C, LDU24: -40 °C to +85 °C, LDU24 1000 mA unit: -40 °C to +70 °C, LDU48: See derating curves Case Temperature • LDU08 & 24: +100 °C max LDU48: +110 °C max Storage Temperature • -40 °C to +125 °C Humidity • Up to 95%, non-condensing Thermal Impedance • 35-50 °C/W model dependant Ingress Protection • IP67 (wired versions) Rating 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 DCDC LDU08/24 Models and Ratings With Dimming Control Output Power 8.0 8.0 14.0 17.0 20.0 24.0 Input Voltage Range W W W W W W 7 7 7 7 7 7 - 30 30 30 30 30 30 Output Voltage V V V V V V 2 2 2 2 2 2 - 28 28 28 28 28 28 Output Current V V V V V V 300 350 500 600 700 1000 Efficiency mA mA mA mA mA mA Model Number 95% 95% 95% 95% 95% 95% LDU0830S300 LDU0830S350 LDU2430S500 LDU2430S600 LDU2430S700 LDU2430S1000 Wired Versions (No Dimming Control) Output Power 8.0 14.0 20.0 24.0 Input Voltage Range W W W W 7 7 7 7 - 30 30 30 30 Output Voltage V V V V 2 2 2 2 - 28 28 28 28 Output Current V V V V 350 500 700 1000 Efficiency Model Number 95% 95% 95% 95% LDU0830S350-W LDU2430S500-W LDU2430S700-W LDU2430S1000-W mA mA mA mA Wired Version with Dimming Control Output Power 8.0 14.0 20.0 24.0 Input Voltage Range W W W W 7 7 7 7 - 30 30 30 30 Output Voltage V V V V 2 2 2 2 - 28 28 28 28 Output Current V V V V 350 500 700 1000 Model Number Efficiency mA mA mA mA 95% 95% 95% 95% LDU0830S350-WD LDU2430S500-WD LDU2430S700-WD LDU2430S1000-WD Mechanical Details LDU08 Wired Versions LDU08: 14 Pin DIL 0.60 (15.24) 0.92 (23.4) 0.10 (2.54) 0.20 (5.08) 2 1 0.40 0.02 (10.16) (0.50) 8 0.80 (20.32) 0.27 (6.88) 0.02 (0.50) 0.12 (3.05) 0.55 (14.0) 8 2 0.40 (10.16) 0.55 (14.0) Bottom View 7 Bottom View 14 0.55 (14.0) 1 0.40 (10.16) 16 9 3.94 (100.0) 0.39 (10.0) 0.92 (23.4) 0.92 (23.4) 0.55 (14.00) 0.55 (14.0) 0.08 (1.92) 0.12 (3.05) 0.40 (10.16) 0.40 (10.16) 0.70 (17.78) 0.55 (14.0) DIA. 0.02 (0.50) 2 0.40 (10.16) 0.08 (1.92) 3 7 16 16 15 0.10 (2.54) 10 0.50 (12.70) 3.94 (100.0) 0.39 (10.0) Stripped & tinned 9 0.02 (0.50) LDU Connections LDU08 1. All dimensions are in inches (mm) 2. Weight: LDU08 - 0.006 lbs (2.6 g) approx. LDU08 (wired version) - 0.02 lbs (11.1 g) approx. LDU24 - 0.014 lbs (6.2 g) approx. LDU24 (wired version) - 0.02 lbs (11.1 g) approx. 3. Pin diameter: 0.02±0.002 (0.5±0.05) 4. Pin pitch tolerance: ±0.014 (±0.35) 5. Case tolerance: ±0.02 (±0.5) 9 0.02 (0.5) 9 Notes 10.16 (0.40) 8 8 16 0.02 (0.50) 2 1 3.94 (100.0) 1 2 8 Bottom View 0.55 (14.0) 10.16 (0.40) 0.55 (14.0) Bottom View 1 Stripped & tinned LDU24 Wired Versions LDU24 16 Pin DIL 0.11 (2.81) 9 8 3.94 (100.0) 0.20 (5.08) 0.40 (10.16) 2 1 16 LDU08-W LDU08-WD 1 1 (Black) 1 (Black) LDU24 LDU24-W LDU24-WD Function 1&2 1 (Black) 1 (Black) -Vin: -DC supply 2 No Wire 2 (White) 3 No Wire 2 (White) Control 7 8 (Blue) 8 (Blue) 7&8 8 (Blue) 8 (Blue) -Vout: LED cathode connection 8 9 (Yellow) 9 (Yellow) 9 &10 9 (Yellow) 9 (Yellow) +Vout: LED anode connection 14 16 (Red) 16 (Red) 15 & 16 16 (Red) 16 (Red) +Vin: +DC supply Note: LDU08: Do not connect Pin 1 (-Vin) to Pin 7 (-Vout). LDU24: Do not connect Pins 1 & 2 (-Vin) to Pins 7 & 8 (-Vout). With Dimming Control Output Power Input Voltage Range W W W W W W W W 9.0 14.0 17.0 20.0 29.0 34.0 40.0 48.0 7 7 7 7 7 7 7 7 - 60 60 60 60 60 60 60 60 Output Voltage V V V V V V V V 2 2 2 2 2 2 2 2 - 57 57 57 57 57 57 57 48 Output Current V V V V V V V V 150 250 300 350 500 600 700 1000 Ripple & Noise (pk-pk) mA mA mA mA mA mA mA mA 150 200 250 300 400 450 500 800 mV mV mV mV mV mV mV mV Model Number Efficiency 97% 97% 97% 97% 97% 97% 97% 97% LDU4860S150 LDU4860S250 LDU4860S300 LDU4860S350 LDU4860S500 LDU4860S600 LDU4860S700 LDU4860S1000 Wired Versions (No Dimming Control) Output Power 9.0 14.0 17.0 20.0 29.0 34.0 40.0 48.0 Input Voltage Range W W W W W W W W 7 7 7 7 7 7 7 7 - 60 60 60 60 60 60 60 60 Output Voltage V V V V V V V V 2 2 2 2 2 2 2 2 - 57 57 57 57 57 57 57 48 Output Current V V V V V V V V 150 250 300 350 500 600 700 1000 Ripple & Noise (pk-pk) mA mA mA mA mA mA mA mA 150 200 250 300 400 450 500 800 mV mV mV mV mV mV mV mV Efficiency Model Number 97% 97% 97% 97% 97% 97% 97% 97% LDU4860S150-W LDU4860S250-W LDU4860S300-W LDU4860S350-W LDU4860S500-W LDU4860S600-W LDU4860S700-W LDU4860S1000-W Wired Version with Dimming Control Output Power 9.0 14.0 17.0 20.0 29.0 34.0 40.0 48.0 Input Voltage Range W W W W W W W W 7 7 7 7 7 7 7 7 - 60 60 60 60 60 60 60 60 Output Voltage V V V V V V V V 2 2 2 2 2 2 2 2 - 57 57 57 57 57 57 57 48 Output Current V V V V V V V V 150 250 300 350 500 600 700 1000 Ripple & Noise (pk-pk) mA mA mA mA mA mA mA mA 150 200 250 300 400 450 500 800 mV mV mV mV mV mV mV mV Efficiency Model Number 97% 97% 97% 97% 97% 97% 97% 97% LDU4860S150-WD LDU4860S250-WD LDU4860S300-WD LDU4860S350-WD LDU4860S500-WD LDU4860S600-WD LDU4860S700-WD LDU4860S1000-WD Mechanical Details LDU48 24 Pin DIL LDU48 Wired Versions 1.25 (31.75) 0.90 (22.86) 2 3 0.60 (15.24) 4 11 0.10 (2.54) 16 1 12 2 0.80 (20.32) Bottom View 23 22 LDU48 2&3 4 9 & 11 14 & 16 22 & 23 9 1.25 (31.75) 0.80 (20.32) 0.12 (3.05) 0.49 (12.45) LDU48 Connections LDU48-W LDU48-WD Function 1 (Black) 1 (Black) -Vin: -DC supply No Wire 15 (White) Control -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 1 & 2 (-Vin) to pins 9 & 11 (-Vout) 24 13 24 DIA. 0.02 (0.50) 0.60 (15.24) 0.49 (12.45) 0.80 (20.32) Bottom View 14 3.94 (100.0) 15 1 0.49 (12.45) 12 13 3.94 (100.0) 0.39 (10.0) Stripped & tinned Notes 1. All dimensions are in inches (mm) 2. Weight: LDU48 - 0.04 lbs (17.7 g) approx. LDU48 (wired version) - 0.04 lbs (18.0 g) approx. 3. Pin diameter: 0.02±0.002 (0.5±0.05) 4. Pin pitch tolerance: ±0.014 (±0.35) 5. Case tolerance: ±0.02 (±0.5) Derating Curve for LDU48 100 A Output Power (%) DCDC LDU48 Models and Ratings LDU48 Models 80 B 60 A 150 mA, 250 mA, 300 mA, 350 mA B 500 mA, 600 mA, 700 mA C C 1000 mA 40 20 -40 -20 0 20 40 55 60 70 80 100 85 Ambient Temperature (°C) 120 Notes For LDU08 & LDU24 please see Operating Temperature Spec. Output Current Adjustment by Variable Resistor +Vout Control 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. LDU -Vin - Vout The output current can be determined using the equation: 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, LDU08 & 24: <20 VDC, LDU48: <30 VDC ) For LDU08-24 Iout = Iout nom x R For LDU48 (R + 200 k) Iout = Iout nom x R (R + 50 k) Output Current Adjustment by DC Voltage Control Voltage Range: 0.3 V to 1.25 VDC +Vout Control + LDU -Vin -Vout The output current is given by: Iout = Iout nom x Control 1.25 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: Iout = Iout nom x Dpwm (Dpwm = PWM duty cycle) +Vout 1.25V PWM Control LDU -Vin 0V GND - Vout Input Filter to meet Class B Conducted Emissions + + L1 C1 C2 C3 - +Vout LDU - Vout 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 21-Aug-14 DCDC LDU0848 Application Notes