5V DC power for vehicle LED displays
The LAVALEE ASD-12D5N20A100DT is a DC-to-DC power supply for car LED displays. It converts 9–36V DC input to 5V DC, with a 20A, 100W display output and a separate 5V 2A control-card output identified in the manufacturer’s wiring diagram.
For a replacement or a new vehicle sign, check the supply voltage, LED module load and controller requirements before ordering. Match the complete model number on your existing unit to avoid selecting a supply with a different input or output rating.
ASD-12D5N20A100DT specifications
| Parameter | Specification |
|---|---|
| Model | ASD-12D5N20A100DT |
| Input | 9–36V DC |
| Nominal output | 5V DC |
| LED display output | 20A; 100W |
| Control-card output | 5V DC, 2A; separately labeled terminals |
| Cooling | Aluminum alloy enclosure with natural cooling |
| Protection | Reverse-polarity input; output over-current, over-voltage, under-voltage and short-circuit protection; two-stage output over-voltage protection |
The specification also lists low output ripple and noise. Consult the original PDF for the full electrical table and temperature derating curve.
Wiring and load selection
The ASD-12D5N20A100DT specification and wiring diagram (PDF) shows the input polarity and separate connections for the LED modules and control card on page 2. Use these labels to identify the terminals before installation.
- Verify the actual DC source stays within the stated input range.
- Add the maximum current requirements of all connected LED modules; do not size the supply using average image brightness alone.
- Account for enclosure temperature and the manufacturer’s derating curve, especially inside a vehicle.
- Check mounting space, terminal markings and cable routing against the dimension drawing and the unit supplied.
Keep the two labeled output functions distinct when planning the load. Do not assume the 2A control-card output increases the stated 100W display rating.
Frequently asked questions
What is this power supply used for?
It supplies 5V DC power to a vehicle LED display and provides a separately labeled output for its control card. Confirm the voltage and current needs of both devices before selecting it.
Can it connect directly to AC mains?
No. This model specifies a 9–36V DC input. It is not a direct 110V or 220V AC-input supply.
Where can I find the pinout and wiring details?
See page 2 of the linked specification PDF for the terminal layout, polarity, wiring illustration and dimension drawing. Compare that drawing with the markings on your unit.
How many LED modules can one supply power?
There is no universal module count. It depends on each module’s maximum current and the operating temperature. Check the combined load against the applicable output rating and derating curve.
Need help matching a replacement? Contact us with the existing power-supply label and the LED module and controller requirements.
Product photos
