Microchip`s dsPIC33 Digital Signal Controllers for Functional Safety

Implementing advanced motor control often requires a robust solution that offers the performance of a Digital Signal Processor (DSP) engine and the versatile peripherals of a microcontroller. Our dsPIC^® Digital Signal Controllers (DSCs) offer key features and specialized peripherals to meet a variety of requirements for high-performance applications.

These applications require safe and reliable operation to protect end-user well-being. Most of the time, electrical systems operate as intended, but in the event of unexpected condition or system malfunction, safety specifications such as ISO 26262, IEC 60730 and IEC 61508 are used to ensure that manufacturers have designed their products to operate safely.

For example, our sensorless Field Oriented Control (FOC) algorithm makes use of a single-cycle MAC with data saturation, zero overhead looping and barrel shifting for exceptional performance. Discover how dsPIC DSCs, along with our ecosystem of development tools, software and other design resources, make it easy to develop your next Brushless DC (BLDC) motor, stepper motor, Permanent Magnet Synchronous Motor (PMSM) or AC Induction Motor (ACIM) application.

High-Performance dsPIC33 DSC Core

Up to 100 MIPS with a DSP instruction set and modified Harvard architecture for implementing fast control loops
Rich instruction set and addressing modes designed for real-time control where most instructions are single cycle
Dual 40-bit accumulators to implement single-cycle MAC instructions
Full-speed operation from Flash without added wait states
Multiple context registers and accumulators for fast interrupt switching
Devices with a dual-core architecture that provides a slave core dedicated for executing time-critical motor control algorithm and a master core dedicated for implementing system monitoring, user interface and communication functions

Target Applications:

Motor Control
Digital Power Conversion
Battery Charging / Charging Station
High-End (multi-string) LED Control
Applications with hard real time requirements

Functional Safety Ready

Select dsPIC33 DSCs have been designated as “Functional Safety Ready.” A product that contains the “Functional Safety Ready” designation offers integrated hardware safety features, Failure Modes, Effects, and Diagnostic Analysis (FMEDA) reports, safety manuals, and, in some cases, diagnostic software libraries. A TÜV SUD-certified C-compiler and a complete and fully qualified development environment are also available.

Functional Safety Readiness

Functional Safety Readiness	ISO 26262 (ASIL B and ASIL C)	IEC 61508 (SIL 2)		IEC 60730 (Class B)
Hardware Safety Features	Yes	Yes	Yes
Safety Library	ASIL B and ASIL C Compliant Diagnostic Library*	Releasing Soon	Class B Safety Library
AUTOSAR^® MCAL Drivers	Yes*	N/A	N/A
Safety Manual	Yes*	Releasing Soon	N/A
FMEDA Reports	Yes*	Releasing Soon	N/A
TÜV SUD-Certified Compiler	MPLAB^® XC16 Compiler
Code Coverage Tools	MPLAB Code Coverage or third-party tools from vendors such as LDRA

Featured Controller Families

Product Family	CPU	CPU Speed	Program Memory	AEC Q100	Applications
dsPIC33CH512MP508 dsPIC33CH128MP508	Dual Core	90 + 100 MIPS	Up to 512 KB	Grade 0 Up to 150°C	High-Performance Embedded Digital Power Motor Control
dsPIC33CK256MP508 dsPIC33CK64MP105	Single Core	100 MIPS	Up to 256 KB	Grade 0 Up to 150°C	High-Performance Embedded Digital Power Motor Control Sensor Interfacing
dsPIC33EP128GS808	Single Core	70 MIPS	Up to 128 KB	Grade 1 Up to 125°C	High-Performance Embedded Digital Power
dsPIC33EV256GM106	Single Core	70 MIPS	Up to 256 KB	Grade 0 Up to 150°C	High-Performance Embedded Motor Control Sensor Interfacing

Functional Safety Relevant Features – PIC24 MCUs and dsPIC33 DSCs

Dedicated peripherals and functions have been integrated into PIC24 and dsPIC33 devices to help increase the reliability and monitoring for safety-critical applications. These features help ensure that end applications operate as intended, with safe shut down if any exception or issue arises.

Feature	dsPIC33C	dsPIC33E	PIC24F	Fault Prevention	Self Diagnostic	System Diagnostic	Fault Mitigation
CRC Module/Cyclical Redundancy Check (CRC)*	●	●	●		✔	✔
Flash Error Detection and Correction (ECC)	●	○	○		✔		✔
Read/Write Memory Protection	●	●	●	✔
Boot Segment Protection	●	●	○	✔
Dual Partition Program Memory	●	○	○	✔	✔
Illegal Opcode Detect	●	●	●		✔		✔
Load Once Per Reset Config Register	●	●	●				✔
RAM BIST	○	–	–		✔
Self-Readable Flash Memory	●	●	●		✔

Reference Design

Vienna 3-Phase Power Factor Correction (PFC) Reference Design

The MSCSICPFC/REF5 is a 3-phase Vienna PFC reference design for Hybrid Electric Vehicle/Electric Vehicle (HEV/EV) charger and high-power switch mode power supply applications. This reference design achieves 98.6% efficiency at 30 kW output power.

Microchip/Microsemi 700V, 15 mΩ SiC MOSFETs and 1200V, 30A SiC Schottky Barrier Diodes (SBDs)
Digitally controlled current and voltage loop using a Microchip dual core dsPIC33CH microcontroller
Model for Simulation available (Piecewise-Linear Electrical Circuit Simulation (PLECS))

https://www.microchip.com/design-centers/power-management/silicon-carbide-sic-devices-and-power-modules/reference-designs/vienna-power-corrections-reference-design

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