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High-power LED lamp boost constant current drive controller

  • 2013-07-09
  • 1.12MB
  • Points it Requires : 2

High-power LED lamp boost constant current drive controller QX5305 is a high-efficiency, stable and reliable high-brightness LED lamp drive control IC, with built-in high-precision comparator, off-time control circuit, constant current drive control circuit, etc., which is particularly suitable for high-power, multiple high-brightness LED lamp string constant current drive. QX5305 adopts fixed off-time control working mode, and its operating frequency can be as high as 2.5MHz, which can reduce the external inductance and filter capacitor, volume, and improve efficiency. Adding PWM signal to the DIM pin can adjust the brightness of the LED lamp. By adjusting the external resistor, the driving current of the high-brightness LED lamp can be controlled so that the brightness of the LED lamp reaches the expected constant brightness. The current flowing through the high-brightness LED lamp can vary from a few milliamperes to 2 amperes.

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