5252F Led Driver Pdf
Switching regulators, aka 'DC-to-DC', 'buck' or 'boost' converters, are the fancy way to power an LED. they do it all, but they are pricey. what is it they 'do' exactly? the switching regulator can either step-down ('buck') or step-up ('boost') the power supply input voltage to the exact voltage needed to power the LED's. unlike a resistor it constantly monitors the LED current and adapts to keep it constant. It does all this with 80-95% power efficiency, no matter how much the step-down or step-up is.
Pros:
- consistent LED performance for a wide range of LED's and power supply
- high efficiency, usually 80-90% for boost converters and 90-95% for buck converters
- can power LED's from both lower or higher voltage supplies (step-up or step-down)
- some units can adjust LED brightness
- packaged units designed for power-LED's are available & easy to use
Cons:
- complex and expensive: typically about $20 for a packaged unit.
- making your own requires several parts and electrical engineering skillz.
The LED lights shutdown without flicker when the battery voltage is low. The internal circuits of QX5252 include switching driver, light control switching circuit, over-discharge protection, and the internal integrated Schottky diode. Light Control Switch Setting TO-94 Package Uses solar panels to achieve light control.
5252f Led Driver How To
5252f Led Driver Pdf Software
One off-the-shelf device designed specially for power-led's is the Buckpuck from LED Dynamics. I used one of these in my power-led headlamp project and was quite happy with it. these devices are available from most of the LED web stores.