This solution includes power measurement chip, LCD display, real-time clock, data storage, prepaid card, infrared meter reading, automatic remote meter reading through RS-485, PLC power line carrier communication, 470 MHz wireless communication, strong anti-interference ability and optimal Reliability and other advantages.
This document describes a non-isolated, high power factor (PF), high efficiency, triac dimmable LED driver that operates from an input voltage range of 195 VAC to 265 VAC (50 Hz typical). The LED light string provides a driver with a rated voltage of 41 V and a rated current of 350 mA.
The topology used is a single-stage, non-isolated, tapped buck topology, which can meet the high power factor, constant current adjustment and dimming requirements of this design.
This document contains LED driver specifications, circuit schematics, PCB design details, bill of materials, transformer specification files and typical performance characteristics.
This solution uses the Nuvoton N79E8xx series to provide the advantages of high performance, low cost, weight measurement, digital display, and excellent reliability.