JW1991C is an ultra-low system cost high precision LED constant current driver chip, suitable for 85-265V AC input voltage full range of non-isolated buck type LED constant current power supply system. The JW1991C uses a 500V single-chip integrated power MOSFET, which requires very few peripheral components to achieve excellent constant current characteristics.
JW1991C chip with high precision current sampling circuit, while using advanced constant current control technology, to achieve high precision LED constant current output and excellent linear adjustment rate. The chip works in the inductive current critical mode, and the system output current does not change with the inductance and the operating voltage of the LED, achieving excellent load adjustment rate.
The JW1991C has multiple protection features, including cycle current limit protection (OCP),LED open\/short circuit protection, VDD undervoltage protection, intelligent temperature control, pin floating protection, etc. JW1991C save VCC capacitance, and do not need to adjust the pole parameters, low cost of power supply solution