DC-DC
LED Driver
xppower.com
LDU20 Series
•
Constant Current Output
•
LED Drive Current up to 700 mA
•
LED Strings from 2 V to 28 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
• 7-30 VDC
• Capacitor
• 40 VDC for 0.5 s
Efficiency
Switching Frequency
MTBF
Output
Output Voltage
Output Current
Output Current Trim
Output Current
Accuracy
Ripple & Noise
• See tables
(Vin must be at least 2 V greater than Vout)
• See tables
• 25-100%
• ±10
• 450 mV pk-pk max,
measured with 20 MHz bandwidth
Short Circuit Protection • Current is limited to the rated output
Temperature
• ±0.05%/°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
• 70-450 kHz variable
• >1.6 MHrs to MIL-HDBK-217F at 25 °C,
GB
Environmental
Operating Temperature
Storage Temperature
Humidity
Thermal Impedance
•
•
•
•
-40 °C to +70 °C
-40 °C to +125 °C
Up to 95%, non-condensing
40 °C/W
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
Output Power
Input Voltage Range
Output Voltage
Output Current
Efficiency
Model Number
14 W
7-30 V
2-28 V
500 mA
95%
LDU2030S500
17 W
7-30 V
2-28 V
600 mA
95%
LDU2030S600
20 W
7-30 V
2-28 V
700 mA
95%
LDU2030S700
Mechanical Details
20.32 (0.80)
15.24
(0.60)
2.54
(0.10)
1
5.08
(0.20)
1
2
7
8
14
10.16
(0.40)
2
7
Bottom View
0.50
(0.02)
6.88
(0.27)
Pin Connections
-DC supply
PWM/ON/OFF or not used
LED cathode connection
LED anode connection
+DC supply
-V Input
Control
-V Output
+V Output
+V Input
Note: Do not connect pin 1 (-Vin) to pin 7 (-Vout)
Notes
8
1. All dimensions are in inches (mm)
2. Weight: 0.006 lbs (2.6 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)
3.05
(0.12)
5.08
(0.20)
0.50
(0.02)
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
Iout nom = Rated Max I x Control Voltage
The output current is given by:
1.25
Rated Max I x R
The output current can be determined using the equation:
+Vout
Iout =
(R + 200 k)
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
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