System layout of the proposed LED driver Circuit Diagram - consistent LED performance with any power supply and LED's - costs about $1 - only 4 simple parts to connect - efficiency can be over 90% (with proper LED and power supply selection) - can handle LOTS of power, 20 Amps or more no problem. - low "dropout" - the input voltage can be as little as 0.6 volts higher than the output voltage. Now coming back to our LED driver subject, in this post I will elucidate two simple methods of designing LED drivers, 1) SMPS method, 2) capacitive power supply method. Warning: Circuits I have explained below are not isolated from mains AC, and therefore are extremely dangerous to touch in the powered and open condition. A constant-current power regulator is a must for LED illumination because a high-power LED's current may double with a voltage increase of only 10% - meaning that there is a high possibility of damage to the LED. The power stage's topology and flexible dimming control are two main considerations for choosing LED illumination drivers, as
note demonstrates a minimal parts count driver/control-ler for a high-power (1W or greater) LED. The circuit is based on a buck topology switching power supply using the on-chip comparator peripheral within the PIC12F675 PICยฎ microcontroller. The switching power supply design ensures efficient power transfer between the system battery and the LEDs / Discrete / Modules LED / Display Drivers. High-power LEDs produce more lumens per watt than previous lighting technology and are replacing incandescent and CFL light bulbs. When driving high-power LEDs, the power dissipation in a current limiting resistor can make the approach impractical and unattractive.
Key Electronics Circuit Diagram
The high-quality LED driver can always control the line and load regulation to <=1% value. g. Programmability of LED Driver integrated controllers or sensors so as to provide smart systems or functions to the end-users and the 12V/2~4W power from LED Driver can make the design much easier compared with using an AC adapter to create the 12V Constant Current Driver: The driver ensures that the LED gets a constant current regardless of voltage fluctuations. This is ideal for LEDs that require a fixed current for proper operation. Constant Voltage Driver: The driver maintains a steady voltage but allows the current to fluctuate based on the load.This is typically used when the LED needs a specific voltage, regardless of the current
The LED voltage was ~23V, the power supply 24V. So no other way than to use a buck-boost regulator here. Yes, in essence it's a boost regulator, but instead working to GND you work to 24V
