DCDC
Specification
LED Driver
• 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
LDU56 Series
Input
Input Voltage • 9-60 VDC
Input Filter • Capacitor
Input Surge • 65 VDC for 500 ms
Output
Output Voltage • 2-56 V (Vin must be at least 4 V greater
than Vout)
Output Current • See tables
Output Current • See tables
Accuracy
Ripple & Noise • 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 • 1% to 100%
Operating Frequency • 1 kHz max
On Time • 50 µs min
Off Time • 50 µs min
Amplitude • 2.5 V, 5 V max
xppower.com
General
Efficiency • See tables
Switching Frequency • 40-1000 kHz variable
MTBF • >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 • EN55015 class B conducted & radiated
with external components - see
application notes
ESD Immunity • EN61000-4-2, level 2 Perf Criteria A
Radiated Immunity • EN61000-4-3, level 2 Perf Criteria A
EFT/Burst • EN61000-4-4, level 2 Perf Criteria A
Conducted Immunity • EN61000-4-6, level 2 Perf Criteria A
Magnetic Field • EN61000-4-8, level 2 Perf Criteria A
