SD690XS is a control chip dedicated to non-isolated LED driving. The peripheral application adopts floating Buck architecture, and integrates 600V high-voltage power MOSFET. Under this architecture, the chip samples the inductance current into the internal and uses the internal error amplifier to form a closed-loop feedback network, thus achieving high constant current accuracy and high input/output adjustment rate. At the same time, the chip has built-in PFC control, which automatically realizes a high PF value over the entire voltage range. The chip's critical conduction mode reduces switching losses and improves system conversion efficiency.
