SPRSP61C October 2021 – December 2023 TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038C-Q1 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1
PRODMIX
MODULE | FEATURE | SYSTEM BENEFIT |
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PROCESSING | ||
Real-time control CPUs |
Up to 120 MIPS C28x: 120 MIPS CLA: 120MIPs Flash: Up to 384KB RAM : Up to 69KB 32-bit Floating-Point Unit (FPU32) Trigonometric Math Unit (TMU) CRC engine and instructions (VCRC) |
Provides 120 MHz of signal-processing performance for floating- or fixed-point code running from either on-chip flash or SRAM. CLA:32-bit floating point Control Law Accelerator, parallel execution to C28x CPU FPU32: Native hardware support for IEEE-754 single-precision floating-point operations TMU: Accelerators used to speed up execution of trigonometric and arithmetic operations for faster computation (such as PLL and DQ transform) optimized for control applications. Helps in achieving faster control loops, resulting in higher efficiency and better component sizing. Special instructions to support nonlinear PID control algorithms VCRC: Provides a straightforward method for verifying data integrity over large data blocks, communication packets, or code sections. |
SENSING | ||
Analog-to-Digital Converter (ADC) (12-bit) |
Up to 3 ADC modules 4 MSPS Up to 23 channels |
ADC provides precise and concurrent sampling of all three-phase currents and DC bus with zero jitter. ADC post-processing – On-chip hardware reduces ADC ISR complexity and shortens current loop cycles. More ADCs help in multiphase applications. Provide better effective MSPS (oversampling) and typical ENOB for better control-loop performance. |
Comparator Subsystem (CMPSS) | CMPSS 4 windowed comparator Dual 12-bit DACs DAC ramp generation Digital filters 60-ns detection to trip time Slope compensation |
System protection without false alarms: Comparator Subsystem (CMPSS) modules are useful for applications such as peak-current mode control, switched-mode power, power factor correction, and voltage trip monitoring. PWM trip-triggering and removal of unwanted noise are easy with blanking window and filtering features provided with the analog comparator subsystems. Provides better control accuracy. No need for further CPU configuration to control the PWM with the comparator and 12-bit DAC (CMPSS) Enables protection(CMPSS) and control(ADC) using the same pin. |
Enhanced Quadrature Encoder Pulse (eQEP) | 2 eQEP modules | Used for direct interface with a linear or rotary incremental encoder to get position, direction, and speed information from a rotating machine used in a high-performance motion and position-control system. Support CW/CCW encoding. Also can be used in other applications to count input pulses from an external device (such as a sensor). |
Enhanced Capture (eCAP) |
3 eCAP modules Measures elapsed time between events (up to 4 time-stamped events). Connects to any GPIO through the input X-BAR. When not used in capture mode, the eCAP module can be configured as a single-channel PWM output (APWM). |
Applications for eCAP include: Speed measurements of rotating machinery (for example, toothed sprockets sensed through Hall sensors) Elapsed time measurements between position sensor pulses Period and duty cycle measurements of pulse train signals Decoding current or voltage amplitude derived from duty-cycle encoded current/voltage sensors |
ACTUATION | ||
Enhanced Pulse Width Modulation (ePWM) |
Up to 16 ePWM channels Ability to generate high-side/low-side PWMs with deadband Supports Valley switching (ability to switch PWM output at valley point) and features like blanking window |
Flexible PWM waveform generation with best power topology coverage. Shadowed Dead band itself and shadowed action qualifier enable adaptive PWM generation and protection for improved control accuracy and reduced power loss. Enables improvement in Power Factor (PF) and Total Harmonic Distortion (THD), which is especially relevant in Power Factor Correction (PFC) applications. Improves light load efficiency. |
One-shot and global reload feature |
Critical for variable-frequency and multiphase DC-DC applications and helps in attaining high-frequency control loops (>2 MHz). Enables control of interleaved LLC topologies at high frequencies |
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Independent PWM action on a Cycle-by-Cycle (CBC) trip event and an One-Shot Trip (OST) trip event |
Provides cycle-by-cycle protection and complete shutoff of PWM under fault condition. Helps implement multiphase PFC or DC-DC control. | |
Load on SYNC (support for shadow-to-active load on a SYNC event) | Enables variable-frequency applications (allows LLC control in power conversion). | |
Ability to shut down the PWMs without software intervention (no ISR latency) | Fast protection under fault condition | |
Delayed Trip Functionality | Helps implement the deadband with Peak Current Mode Control (PCMC) Phase-Shifted Full Bride (PSFB) DC-DC easily without occupying much CPU resources (even on trigger events based on comparator, trip, or sync-in events). | |
Dead band Generator (DB) submodule | Prevents simultaneous ON conditions of High and Low side gates by adding programmable delay to rising (RED) and falling (FED) PWM signal edges. | |
Flexible PWM Phase Relationships and Timer Synchronization | Each ePWM module can be synchronized
with other ePWM modules or other peripherals. Keeps PWM edges perfectly
in synchronization with certain events. Supports flexible ADC scheduling with specific sampling window in synchronization with power device switching. |
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High-Resolution Pulse Width Modulation (HRPWM) |
8 channels with high-resolution capability (150 ps) Provides 150-ps steps for duty cycle, period, Dead band, and phase offsets for 99% greater precision |
Beneficial for accurate control and enables better-performance high-frequency power conversion. Achieves cleaner waveforms and avoids oscillations/limit cycle at output. |
CONNECTIVITY | ||
Serial Peripheral Interface (SPI) | 2 high-speed SPI port | Supports 30 MHz |
Serial Communication Interface (SCI) | 2 SCI (UART) modules | Interfaces with controllers |
Local Interconnect Network (LIN) | 2 LIN | Provides a low-cost solution where the bandwidth and fault tolerance of a Controller Area Network (CAN) are not required Can also be used as simple UART |
Controller Area Network (CAN/DCAN) | 1 DCAN module | Provides compatibility with classic CAN modules |
Controller Area Network (CAN FD/MCAN) | 1 CAN FD/MCAN module | CAN FD (flexible data-rate) is an enhancement to the classic CAN protocol. CAN FD facilitates dynamic switching to higher bit rates (>1 Mbps) for the data segment and allows for up to 64 bytes compared to 8 bytes in classic CAN. This is done without having to change the physical layer. This results in a bandwidth gain over traditional CAN. Systems using CAN-FD benefit from faster in-the-field flash updates. |
Inter-Integrated Circuit (I2C) | 2 I2C modules | Interfaces with external EEPROMs, sensors, or controllers |
Power-Management Bus (PMBus) |
1 PMBus module Compliance with the SMI Forum PMBus Specification (Part I v1.0 and Part II v1.1) |
Seamless HW-based host communication |
OTHER SYSTEM FEATURES | ||
Security enhancers |
Dual-zone Code Security Module (DCSM) Watchdog Write Protection on Register Missing Clock Detection Logic (MCD) Error Correction Code (ECC) and parity Dual-Clock Comparator (DCC) |
DCSM: Prevents duplication and reverse-engineering of proprietary code Watchdog: Generates reset if CPU gets stuck in endless loops of execution Write Protection on Registers: LOCK protection on system configuration registers Protection against spurious CPU writes MCD: Automatic clock failure detection ECC and parity: Single-bit error correction and double-bit error detection DCC: Used to detect faults in clock source |
Crossbars (XBARs) | Provides flexibility to connect device inputs, outputs, and internal resources in a variety of configurations. • Input X-BAR • Output X-BAR • ePWM X-BAR |
Enhances hardware design versatility: Input X-BAR: Routes signals from any GPIO to multiple IP blocks within the chip Output XBAR: Routes internal signals onto designated GPIO pins ePWM X-BAR: Routes internal signals from various IP blocks to EPWM |