10 June 2015Power Electronics / Power Management
DSP, Micros & Memory
Microchip announced the dsPIC33EP ‘GS’ family of digital signal controllers (DSCs), with 14 members that deliver the performance needed to implement sophisticated non-linear, predictive and adaptive control algorithms at high switching frequencies. These advanced algorithms enable power supply designs that are more energy efficient and have better 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, the new 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.
This product family includes advanced features such as Live Update Flash capability, which is especially helpful for high-availability or ‘always-on’ systems. Live Update 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 include up to five 12-bit ADCs with as many as 22 ADC inputs, providing total throughput of 16 MSps with 300 ns ADC latency. The GS 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.
Available in a 4 x 4 mm UQFN package for space-constrained designs and with pin counts ranging from 28 to 64, the new chips are well suited to a wide range of applications including computing and telecoms 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 and DC-DC converters.
Microchip’s new Digital Compensator Design Tool helps engineers to calculate the optimum compensator coefficients required to maximise the performance of their designs. This free tool, combined with Microchip’s compensator software libraries and many royalty-free dsPIC33 reference designs, make it easier than ever to design digital power conversion applications.
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