ON Semiconductor NCL30486 Primary-Side Controller for LED Drivers Provides High Power Quality
ON Semiconductor’s NCL30486 is a primary-side PWM power controller for LED drivers which enables very deep analog dimming.
The NCL30486 provides a very high-quality power output which eases compliance with the strict regulations applied to LED lighting circuits. In particular, it achieves a power factor greater than 0.95 and total harmonic distortion of less than 10%.
Excellent current regulation which is accurate to <±2% maintains constant brightness with imperceptible variation in flux. Voltage regulation is accurate to <±1%.
The NCL30486 is a single-stage, constant-current/constant-voltage PWM controller which can be applied in various power-conversion topologies, including flyback, buck-boost, Sepic and boost. It operates in a quasi-resonant mode to give high efficiency.
Thanks to a novel control technique applied by ON Semiconductor, the device is able to tightly regulate a constant LED current from the primary side. The analog dimming output current is supplied via two dedicated dimming control input pins, ADIM and PDIM.
|View all Issues of FTM|