PJ9910 is a high-efficiency, stable and reliable high-brightness LED constant current drive control IC. It has built-in high-precision comparator, off-time control circuit, constant current drive circuit, etc. It is particularly suitable for high-power, multiple high-brightness LED string constant current drive. PJ9910 adopts fixed off-time control working mode, and its operating frequency can be as high as 2.5MHz, which can make the external inductance and filter circuit high, reduce the volume, and improve efficiency. The minimum off-time time can be set by external resistors and inductors, and the operating frequency can be changed according to user requirements. Adding PWM signal at the EN end 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 1 ampere.
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