Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

Texas Instruments C2000 real-time control series products are about to add new members to F28003X. F28003X provides higher computing performance and larger FLASH space than F28002X/F28004X. A few days ago, Dean, an embedded field application engineer at Texas Instruments, gave a detailed introduction to the features and applications of F28003X in the EEWORLD live broadcast room.

Texas Instruments C2000 real-time control series products are about to add new members to F28003X. F28003X provides higher computing performance and larger FLASH space than F28002X/F28004X. A few days ago, Dean, an embedded field application engineer at Texas Instruments, gave a detailed introduction to the features and applications of F28003X in the EEWORLD live broadcast room.

Speaking from the third generation of C2000

C2000 microcontroller is a microcontroller designed for real-time control. There are two main application areas, including digital power control (such as solar and wind power control, communication and server power), and motor control (home appliances Electronic products: air conditioners, refrigerators, washing machines, unmanned aerial vehicles, electric vehicles, water pumps, etc., industrial servo drives: such as industrial robots, servo drives, inverters, etc.) In addition, because they have vehicle-level certification requirements, so It is also suitable for many automotive applications, including power control and motor control.

Dean said that the C2000 product family has been in supply for 25 years and is widely used in industries and automobiles. It has good real-time performance, high reliability, high integration, rich product categories, a unified and simple development environment, a complete motor control and digital power management software library, software compatibility, and some types of Pin 2 Pin hardware are fully compatible with Many Fabs are produced to ensure the stability of supply. In addition, TI also provides a series of reference demos to facilitate customers’ early reference design and debugging.

As a major supplier in the signal chain field, in addition to analog, C2000 also implements a complete control signal chain concept. Including signal acquisition, processing, calculation and final PWM output.

As shown in the figure, the C2000 product family is still quite distinctive in terms of sensing, processing, control and interfaces.

First of all, for signal acquisition peripherals, C200 can support up to 24 channels of 12-bit/16-bit ADC, full-featured comparator-to achieve over-current or over-heat protection and digital power peak current control, etc., quadrature encoding and capture logic implementation Capture of pulse signals, etc.

In terms of signal processing, the C2000 integrates a C28 floating-point DSP core and supports a multi-core architecture with a processing capacity of up to 925 MIPs.

In terms of PWM control, C2000 can support up to 32 channels of high-flexibility and high-precision PWM, with a maximum control accuracy of 150 picoseconds. Moreover, PWM and analog peripherals are tightly coupled, for example, the comparator can realize fast shutdown when detecting overcurrent protection.

In terms of interfaces, C2000 integrates various standard communication interfaces, including CAN, CAN-FD, LIN, etc., and also supports FSI high-speed serial buses.

In terms of innovation, C2000’s CLB (Configurable Logic Block) module can replace existing FPGA solutions or enhance existing peripheral functions.

CLB integrates an optimized high-speed programmable logic into real-time controllers such as C2000 MCUs, providing key peripherals such as enhanced pulse width modulator (PWM), enhanced capture, enhanced quadrature encoder and general I/O Provides intelligent signal input/output (I/O) routing functions, and eventually becomes an enhanced intellectual property (IP) module with system-level differentiated features.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?
Example of CLB tool cell block

As shown in the figure, the CLB tool includes two, four or eight logic blocks, each of which is a set of optimized programmable logic units.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

Today, C2000 has developed to the third generation, using a 65nm process node. Compared with the previous generation of 180nm, it has made great progress in terms of performance, power consumption, and cost. At the same time, TI is also planning the fourth-generation C2000 series, with a built-in C29 DSP core, which will increase real-time processing performance by 2 to 3 times.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

As shown in the figure, the C2000 series has a rich product line, covering different applications of high, middle and low end according to different Flash and processors.

C2000F28003X features at a glance

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

C2000F28003X includes a 32/64-bit C28 floating-point DSP with a main frequency of 120MHz and a CLA with a main frequency of 120MHz, with a processing capacity of 240 MIPs. In addition, it also contains instruction-optimized TMU, VCU, etc. arithmetic units, which can respond quickly to achieve high real-time performance.

Among them, the CLA (Control Law Accelerator) control rate accelerator is an independently programmable 32-bit floating point digital processing unit designed for fast trigger response and mathematical operations. The CLA works independently of the C28x CPU, the clock frequency is the same as that of the CPU, and it can execute algorithms and periodic calculations. By increasing the parallel processing unit CLA, the performance of the C28x CPU is expanded. There are currently three types of CLAs in the C2000 series. Different C2000 models correspond to different CLA types. The differences of each type and the details of the corresponding C2000 device model are shown in the figure. Type 2 CLA can directly read the ADC result register, which greatly reduces the delay from ADC sampling to output, improves system response and allows the system to run at a higher frequency; and can directly operate all Epwm, HRPWM, and eCAP , EQEP, CMPSS, DACSDFM, PGA, SPI, LIN, FSI, PMBUS, CLB and GPIO data registers; CLA can independently respond to peripheral interrupts. Using CLA to perform some periodic tasks can free the CPU and make it work for other system tasks.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

Different chips and different CLA cores

C2000F28003X also integrates three independent Flash banks totaling 384kB and 69kB RAM. 16 PWM channels, 8 of which are high resolution.

The analog peripherals include three 4MSPS 12-bit ADCs with post-processing and preset operations, eight Σ-δ demodulation channels, eight window comparators, and two 12-bit DACs.

In terms of communication interface, C2000F28003X especially supports CAN-FD and FSI, and realizes real-time response through high-speed bus.

In addition, C2000F28003X complies with ASIL-B or SIL2 functional safety requirements, and the built-in hardware self-check function can detect 90% of permanent CPU failures.

In order to further reduce the delay, the C2000 series optimizes the information exchange delay between peripherals and storage, and the trip-trigger circuit can quickly turn off the PWM.

In terms of application, Dean uses TIDA 0100621kW, 80 Plus Titanium, GaN CCM totem pole bridgeless PFC and half bridge LLC reference designs as examples. The solution includes a front-end continuous conduction mode (CCM) totem pole bridgeless power factor correction (PFC). ) Power level. The PFC power stage uses LMG341x GaN FETs with integrated drivers, which can achieve high efficiency over a wide load range and meet the requirements of 80 plus titanium. The design also supports half-bridge LLC isolated DC/DC stage to obtain +12V DC output at 1kW power. The two control cards use C2000 Piccolo microcontrollers to control the two power stages.

TI’s LMG341X is a 600V 150mΩ GaN with integrated driver and cycle-by-cycle overcurrent protection. Compared with silicon MOS, it has lower input and output capacitance, reduces switching losses by 80% through zero reverse recovery, and Reduce EMI. The high-precision PWM output and flexible ADC module of the C2000 series, as well as the high-performance floating-point CPU and the TMU supporting trigonometric functions are very suitable for the high-frequency switch control of GAN materials.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

As shown in the figure, the C2000F28003X series has a rich product portfolio to meet the different needs of customers.

Why is the third generation C2000 MCU recommended for digital power supply and motor control projects?

By comparing with other third-generation products, C2000F28003X is the only one that supports CAN-FD, and has a larger Flash and higher frequency. In order to facilitate customers to migrate products in the C2000 series, TI also released corresponding documents. Some are simple to transplant, and some are relatively complicated because of pin or function problems.

In addition, C2000F28003X also integrates EPG (Embedded Pattern Generator), which is a customizable pattern and clock generator that can be used in a variety of testing and application scenarios. In addition to generating simple patterns and clocks, EPG modules can also be used in PWM generators, clock generators or communication peripherals, such as SPI controllers, but they are all in simple modes.

Convenient development environment

Although the C2000 series MCU has a long history, in order to face the new generation of engineers and lower the development threshold, the development ecosystem is constantly being upgraded.

Including sample application, evaluation board, various documents with complete information, supporting development environment, motor control SDK and digital power supply SDK.

C2000 Academy is the most comprehensive processor learning resource provided by TI, which covers a wealth of examples and driver libraries.

At the same time, TI also provides SysConfig graphical development software. For the newly added EPG and CAN-FD of C2000F28003X, there are also related reference manuals.

TI’s functional safety compliant products, documentation, software, and support from knowledgeable experts can simplify and accelerate the ISO 26262, IEC 61508, and IEC 60730 certification processes. Specifically include: on-chip diagnostic functions, integrated subsystems designed to achieve functional safety. Complete documentation of functional safety development process certified by TÜV SÜD.

All in all, the wide application in industry and automobiles proves that C2000 series products have unparalleled real-time performance and high reliability in other architectures. Faced with the increasing complexity of digital power supply and motor control, it is necessary to choose higher-performance ones. The cost-effective C2000 series products would be a good choice.

The Links:   MRF898 NL128102AC31-02E

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