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:
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