New DSC family optimised for digital power applications

12-05-2015 | Microchip Technology | Power

Microchip has introduced a new 14-member dsPIC33EP 'GS' family of digital
signal controllers (DSCs). The family delivers the performance needed to
implement more sophisticated non-linear, predictive and adaptive control
algorithms at higher switching frequencies.

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, the new dsPIC33EP 'GS' 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 new dsPIC33EP 'GS' 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. Variants from this new
digital-power-optimised DSC family are available in the industry's smallest,
4 x 4 mm UQFN package for space-constrained designs, says the company.

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 Mega samples per
second (Msps) with a 300ns ADC latency. The dsPIC33EP 'GS' devices include
12-bit DACs for each of the four analogue comparators, for higher-precision
designs. The two on-chip programmable gain amplifiers can be used for
current sensing and other precision measurements. Including these advanced
analogue amplifiers on the device reduces the number of external components
required, thereby saving cost and board space.

These features, combined with the overall high performance of the dsPIC33EP
'GS' family, make it 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; among
others.

The family is supported by Microchip's MPLAB Starter Kit for Digital Power
(DM330017-2) which allows users to explore using the new dsPIC33EP "GS"
family in popular digital power-conversion topologies.

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.

The company also partnered with Biricha Digital to offer in-depth
digital-power design workshops that help analogue power-supply designers, as
well as embedded system programmers, to leverage the capabilities of full
digital control in their designs.

The 14 dsPIC33EP 'GS' family members are available in various packages, from
28 to 64 pins.

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