MEAN WELL LDDS-1000HWB DC/DC LED Driver
MEAN WELL LDDS-1000HWB is an LDDS-H series DC/DC constant-current step-down LED driver with 1000 mA rated output and 0-10 V, PWM and resistance dimming. It accepts 12-56 VDC and drives a 2-45 VDC LED string subject to the catalog's 4 V input-to-output headroom requirement. This wire-style, fully encapsulated module is intended for DC battery, commercial, portable, track and landscape lighting applications.
Download MEAN WELL LDDS-H Datasheet (PDF)Model Selection
Parameter
Specification
Series and current code
LDDS-H; 1000 denotes the rated 1000 mA output. The family offers fixed current ratings of 250, 300, 350, 500, 700 and 1000 mA.
W and function suffix
W denotes wire style. B denotes three-in-one dimming.
Application class
The catalog describes Class III (SELV) lighting applications. Select an appropriate DC supply and verify the completed lighting system.
Track-adapter application
The catalog lists STUCCHI track-adapter applications. Confirm the actual mechanical fit, wiring and LED load; a track adapter is not identified as an included accessory.
Output and Input
Parameter
Specification
Rated output current
1000 mA constant current.
LED forward-voltage range
2-45 VDC. Maintain the catalog-specified 4 V step-down headroom from the DC input; input and LED-string voltage must be selected together.
Power at the voltage limit
45 W at 45 V and 1000 mA, calculated as V × I. This is subject to input headroom and temperature limits; the family-level 45 W description is not every model's output rating.
Current accuracy
±5% typical at 48 VDC input (or 24 VDC).
Ripple and noise
350 mVp-p maximum; measured with 20 MHz bandwidth using a 12-inch twisted pair terminated with a 0.1 µF capacitor.
Switching frequency
40-1000 kHz; this is distinct from the external dimming-signal frequency.
External capacitive load
2.2 µF maximum.
DC input
12-56 VDC; nominal test input 48 VDC. Use DC supply connections as shown in the model wiring diagram.
Efficiency
96% typical at 48 VDC input, 36 VDC output, without dimming. The series headline is up to 96%; the plotted efficiency also varies with LED-string voltage and input voltage.
Input current
820 mA at full load under the 48 VDC input / 36 VDC output test condition; 6 mA at no load.
Input filter
Capacitor input filter and built-in EMI filtering.
General test conditions
Unless otherwise stated: normal 48 VDC input, rated load, 25°C ambient and 70% RH. The efficiency plots compare 24 V and 48 V input over different LED counts; they are not one efficiency guarantee for every load.
Control Connections
Parameter
Specification
Control reference
Connect DIM(-) to -Vin. Control voltages are referenced to -Vin; leave the control input open when unused.
ON/OFF thresholds
ON: control voltage above 2.5 V up to 15 VDC, or open circuit. OFF: below 0.3 VDC, or shorted to -Vin. Observe the specific control curves for the ordered function suffix.
Three-in-one interface
Use an additive 0-10 VDC signal, a 10 V PWM signal, or a resistance signal. The dimming source current from the power supply is 200 µA.
PWM dimming
100-1000 Hz with a 10 V high level and 0 V low level. The graph shows dim-to-off at the low end and output increasing with duty ratio to 100%; the off-end region extends to approximately 1% duty.
Voltage dimming curve
The plotted 0-10 V curve shows dim-to-off up to approximately 1 V, increasing output from about 1 V to 9 V, and 100% output at about 9-10 V.
Resistance dimming curve
Use 0-50 kΩ. The graph shows dim-to-off up to approximately 5 kΩ, output increasing between about 5 kΩ and 45 kΩ, and 100% output at about 45-50 kΩ.
PWM-off input current
The specification lists 4 mA at PWM dimming off; this is not an output LED current rating.
Protection and Operating Conditions
Parameter
Specification
Short circuit / overcurrent
Short-circuit current is regulated at rated output current. The catalog permits continued short-circuit operation and specifies automatic recovery after the fault is removed; the feature list includes overcurrent protection.
Overtemperature
Main control IC1 detects a typical junction temperature of 150°C. The unit shuts down and automatically recovers after temperature decreases. This is an IC junction threshold, not an ambient limit.
Ambient temperature
-40 to +50°C at full load according to the model-specific curve. The 1000 mA curve stops full-load operation at 50°C, despite the shared specification row stating -40 to +55°C.
Case temperature
90°C maximum operating case temperature; keep this separate from ambient and IC-junction temperatures.
Cooling
Free-air convection. Arrange the installation so the catalog temperature limits are met.
Operating humidity
20-90% RH, non-condensing.
Storage
-55 to +125°C; 10-95% RH.
Temperature coefficient
±0.03%/°C.
Vibration
10-500 Hz, 2G; 10 minutes per cycle and 60 minutes each along X, Y and Z axes.
MTBF
650,000 hours minimum by MIL-HDBK-217F at 25°C. This reliability calculation is not a guaranteed service lifetime.
Mechanical Details and Wiring
Parameter
Specification
Module dimensions
47 × 12 × 7 mm (L × W × H), excluding leads.
Case and encapsulation
94V-0 flame-retardant plastic case with full encapsulation; the specification lists UL94-V0 epoxy potting.
Wire specification
All wires: UL3385, 22 AWG, rated 300 V / 105°C.
Input lead dimensions
The mechanical drawing shows a 50 ±10 mm input lead and 3 ±1 mm stripped end.
Output lead dimensions
The mechanical drawing shows a 150 ±10 mm output lead and 3 ±1 mm stripped end; it does not separately dimension the DIM lead lengths.
Position 1: -Vin
Black DC-input return. Do not connect -Vin to -Vout.
Position 2: +Vin
Red, DC supply positive.
Position 3: DIM(-)
Black control return; connect to -Vin.
Position 4: DIM(+)
White control lead for three-in-one dimming.
Position 5: +Vout
Yellow, LED positive connection.
Position 6: -Vout
Blue, LED negative connection.
Connection restriction
Do not connect the output to the input of the same unit or to the output of another power source. Keep input and LED-output polarity and return wiring distinct.
Per-unit mass
9.4 g, catalog packing reference for the HWB version; this is not an independently measured shipment weight.
Standards and Catalog References
Parameter
Specification
Listed approval
EAC TP TC 020/2011 approved, as stated in the catalog.
EMC emission
Compliance with BS EN/EN55015 and EAC TP TC 020.
EMC immunity
Compliance with BS EN/EN61000-4-2, -3, -4, -6 and -8; light-industry level, criteria A, and EAC TP TC 020.
Catalog warranty reference
The manufacturer catalog lists a 5-year warranty; applicable warranty terms govern.
Catalog location
LDDS-H specification dated 2024-08-02, pages 10-15 of the linked combined catalog.
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