A 14-member dsPIC33EP GS family of digital signal controllers (DSCs) delivers the performance needed to implement more sophisticated non-linear, predictive and adaptive control algorithms at higher switching frequencies than previous versions. These advanced algorithms enable power supply designs that are more energy efficient and have better power supply specifications. Higher switching frequencies enable the development of physically smaller power supplies that offer higher densities and lower costs. Compared with the previous generation of DSCs, these devices provide less than half the latency, when used in a three-pole three-zero compensator, and consume up to 80% less power in any application.
The digital signal controller family provides a live update flash capability, targeting high-availability systems. The Live Update feature can be used to change the firmware of an operating power supply, including the active compensator calculation code, while maintaining continuous regulation. Other key features of this family include up to five 12-bit ADCs with as many as 22 ADC inputs, providing total throughput of 16 Ms/s with a 300 ns ADC latency. The devices include 12-bit DACs for each of the four analog comparators, for higher-precision designs. The two on-chip programmable gain amplifiers can be used for current sensing and other precision measurements. The DSCs are suited for computer and telecom (ac/dc and dc/dc power supplies), industrial (solar inverters, LED lighting, HID lighting, battery chargers, projectors and welders) and automotive (LED and HID headlights, dc/dc converters). View a brief presentation at http://www.microchip.com/Presentation-051215a
Advertisement
