High Voltage Led Driver Ic

The circuit must provide sufficient current to light the led at the required brightness but must limit the current to prevent damaging the led.

High voltage led driver ic. For applications operating close to safe extra low voltage selv limits it provides a high safety voltage margin. This wide input operating voltage range enables the driver to be used in a broad range of hb led applications. Q2 power dropped volts led current. Dlpa3005 pmic and high current led driver ic 1 1 features 1 high efficiency high current rgb led driver drivers for external buck fets up to 16 a drivers for external rgb switches 10 bit programmable current per channel inputs for selecting color sequential rgb leds generation of dmd high voltage supplies.

Cpc9909 is a low cost high efficiency offline high brightness hb led driver manufactured using our high voltage bcdmos on soi process. Q2 acts as a variable resistor stepping down the voltage from the power supply to match the need of the led s. Topologies include boost regulator. Led driver ic s high brightness led drivers are integrated circuits that are optimized to efficiently drive strings of high brightness leds.

Maxim s continually expanding portfolio includes products covering the full range of efficient switch mode topologies step down step up sepic as well as some linear led drivers. The driver ic is ideally suited for general and professional led lighting applications with high dimming requirements. Analog devices has a very broad line of led driver ics for automotive display backlighting handheld and general high power lighting applications. Diodes low voltage dc dc high brightness led drivers are targeted at battery powered systems for general illumination applications.

So q2 will need a heatsink if there is a high led current or if the power source voltage is a lot higher than the led string voltage. This driver has an internal regulator that allows it to operate from 8vdc to 550vdc. In electronics an led circuit or led driver is an electrical circuit used to power a light emitting diode led. The buck led driver ic is tailored for leds in general lighting applications with average currents up to 1 5a using a high side integrated switch.

The voltage drop across an led is approximately constant over a wide range of operating.