Maximizing IC Performance
MT7860
PWM/Analog Dimmable APFC BUCK LED Driver
DESCRIPTION
The MT7860 is a high power facto...
Maximizing IC Performance
MT7860
PWM/Analog Dimmable APFC BUCK LED Driver
DESCRIPTION
The MT7860 is a high power factor (PF) Buck LED Driver. It works under Quasi-Resonant Mode (QRM) which reduces both of current and
voltage stress greatly, helps to improve EMI performance and efficiency. The output LED current is sensed by MT7860 with Quasi-full-cycle sensing (QCS) technology, accurate LED current regulation is achieved.
The MT7860 is specially designed for intelligent dimming application. Dimming of LED current can be achieved by decoded PWM or analog signal. The accuracy and consistency of LED current, especially at low dimming level, is achieved by the internal trimming decoder. As Dimming level becomes lower, the switching control method goes from QRM to PFM (Pulse Frequency Modulation) seamlessly. Then smaller output current and lower switching loss are achieved.
MT7860 provides varies of protections to improve the system reliability, including over
voltage protection (OVP), ov...