How to Connect Led Driver to Power 

To connect a led driver to power, you need to understand the different types of connections and what each one does.

This guide will teach you how to connect led driver to power supply and get your project up and running in no time.


Most drivers have a range of 10-36 volts, so make sure your power supply can provide enough voltage.

Once you’ve found the right driver and power supply, follow the manufacturer’s instructions for connecting them. Then, read on to know more!

10 Ways on How to Connect Led Driver to Power

1. Check the Power Supply Voltage

This is the first thing to check when there is a problem with the led driver. A power supply voltage between 5 and 24 volts can be used as the power supply for a led driver.

2. Check the LED Driver IC

A led driver like TIP41 may be damaged. To check the led driver, the resistance of the power resistor must be measured. If there is a short circuit, it is burned and can no longer operate as an led driver.


But if there is no short circuit, it can still operate as a led driver, but the -ve and +ve power pins should be reversed because the led driver was connected in reverse. This will not damage it to be still used for driving LEDs.

3. Check the Ripple

The ripple of a certain current is quite big on some led drivers, so it’s better to recheck the power supply voltage after connecting the led driver.

If it is still too high, there is a problem with the led driver. It may be over-driven or damaged.

4. Double Check the Power Connections

The connection points of the power supply and the led driver must be checked again.

If there is a problem, they can use a screwdriver to disconnect the power supply and led driver, but it is better to disconnect by hand to prolong their life.

5. Check the Current Limitation Resistor

If the resistance of the current limiting resistor is zero or infinite, this means that there’s no load on the output line, so it has no problem.

But if there’s a short circuit on the current limiting resistor, the led driver will be burned and can no longer be used as an led driver.

6. Check for Short Circuits

If everything is checked and still does not work, there may be a short circuit on the power supply or output line. The load must then be short-circuited.

7. Check the Connections

Ensure no loose connections between the power supply, led driver, and load. After checking, make sure to use insulation tape or heat shrink tubing to cover them tightly for protection against corrosion or oxidation.


8. Determine if the LED Driver is Properly Driven

If the power supply voltage is between 5 and 24 volts, the load current of 20 mA or greater, and there are no short circuits on either the output line or the led driver, everything should be fine. It’s just that it might not work with certain types of LEDs.

9. Check the Alternate Resistance of the LED

If the voltage is correct and there are no short circuits, but it still does not work, try to determine if one or more LEDs are faulty.

First, replace each LED with a known good one to find out which LED is causing the problem. After determining which LED is faulty, remove it and replace it with another one.

10. Determining the Sign of Output Voltage

There will be no voltage if a non-polarized capacitor is connected to the output line.

However, suppose a polarized capacitor is connected with its -ve side connected to the power supply and +ve side connected to the output line. In that case, there will be positive voltage on the output line.

If it’s connected with its +ve side to the power supply and -ve side connected to the output line, then there will be negative voltage on the output line. If it’s not connected or short-circuited, there will be zero voltage.

Things to Consider When Connecting Led Driver to Power Supply

1. Voltage:

The voltage of the led driver should be the same as the input voltage to work properly.

For example: If the led driver is connected to a 12V power supply, it should only take in 12-24 volts, and if connected to a 24V power supply, it should only accept 24-48 volts.

2. Current:

The current of the led driver should not be more than its wattage. This is because it would damage the led driver if connected to more wattage than its wattage.

3. Polarity Protection:

Most drivers have built-in protection against incorrect polarity connection, consisting of diodes connecting to opposite power lines and their cathodes (negative prongs) connected.


If the power supply is connected with reverse polarity, this will form a short circuit and prevent damage to the led driver.

4. Power Dissipation of LED:

The led driver should be suitable for the power dissipation of the LED and should not exceed it.

It would damage the LED if connected to a higher wattage than its power dissipation. High-power LEDs may have a separate connection for heat sinking.

5. Overload Protection:

The led driver should have overload protection that prevents damage if the power supply is overloaded.

6. Heat Dissipation:

The led driver should have a built-in cooling system, such as a fan or a heat sink, to dissipate the heat generated by the constant current.

Without this cooling system, the led drivers would get too hot and may damage it or cause it to malfunction.

Safety Measures and Precautions

1. Note the polarity of the anode and cathode in your datasheet.

2. Make sure you have a fuse to protect your circuit from current spikes. A 5A minimum is recommended if you’re not going to use one.

3. Make sure you select the right type of power supply for your circuit. If it is a constant current source, use a constant voltage source.

4. Do not attach this to an electrical outlet or any moving parts device; use AC (alternating current). Only use DC (direct current) sources such as batteries and power supplies which turn on and off with a switch.

5. Check if your power supply provides enough current. The peak current is the peak amount of current you can read from your datasheet, but it typically only lasts for a couple of hundred milliseconds.

Troubleshooting Tips


1. If your circuit does not turn on, make sure that you have a way to turn it off if something goes wrong.

2. If your circuit turns on without the battery connected, check to ensure that the power supply is not sending current when it’s in an off state.

3. If your circuit turns on and doesn’t turn off, check if you need a resistor in series with your input or in parallel if there is already one built in the circuit.

4. If your LED does not light up when you supply a certain current, make sure that it receives more than its rated voltage and less than the maximum recommended voltage.

If there is no minimum input voltage, ensure that it receives at least 5-10% of its rated voltage or at least 0.5 volts.

5. If your circuit turns off abruptly instead of gradually, ensure that your power supply has a lower cutoff voltage than the input voltage.

6. If your circuit’s performance is inconsistent, ensure that you don’t have any exposed connections or metal from wires touching each other, causing a short circuit.

How Many LEDs Can You Connect With a Driver?

You can connect as many LEDs as a driver can handle, but it is essential to know the maximum current rating of your led driver.

You have to make sure that all of your LEDs combined use less than or equal to this amount.

For example, if you have an LED driver with a maximum current rating of 500mA, you cannot connect more than 500mA combined across all LEDs.

Potential Issues With Connecting Many LEDs

If your driver’s maximum current rating is less than the total amount that the LED needs to light up, then this will cause your LEDs not fully to light up.


If it can’t handle one of them, they will all blackout. This is why it is good to use a driver that can handle more current than your load requires.

What Voltage to Use?

You should always use a power source with the same voltage as your driver’s input voltage. So, for example, if your driver takes in 12 to 24 volts DC and you want to power it with less than 24 volts, you have to use a step-down converter.

That being said, most drivers can handle a range of input voltages, so it’s not something that needs to be considered.

Final Verdict

Installing a new LED driver is easy and can help conserve energy, saving you money in the long run.

If your home has an existing wiring system that meets the specifications for LED lighting or if your electrician agrees with installing one, then you can easily install an LED driver while replacing light fixtures.

Whether you’re installing the lights directly on the ceiling of your garage or patio, adding more lights to rooms in your home, using an LED driver will help reduce energy costs and is a great investment.

At the end of this article, you should have a better understanding on how to connect LED driver to power. And also, you can use the knowledge for your future experiment.

If there are any unclear points, just leave us a comment, and we will give you feedback as soon as possible! Thanks for reading!

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