TMS320F28335PTPQ TI TMS320C28x Automotive 32-Bit Floating-Point DSC 150MHz 512KB Flash 12-Ch PWM HRPWM ADC eCAN LQFP-176

TMS320F28335PTPQ Product Overview

The TMS320F28335PTPQ is a high-performance 32-bit floating-point digital signal controller (DSC) from Texas Instruments' Delfino series. Built around a C28x+FPU core running at 150MHz and delivering up to 300MFLOPS, the TMS320F28335PTPQ is AEC-Q100 certified and operates across an automotive temperature range of -40°C to +125°C in a 176-lead LQFP (PTP) package. The TMS320F28335PTPQ integrates 512KB of on-chip Flash and 68KB of SRAM, complemented by a 6-channel DMA controller that offloads data transfers from the CPU. For control tasks, the TMS320F28335PTPQ features six enhanced PWM (ePWM) modules providing 12 PWM outputs, six of which support high-resolution micro-stepping (HRPWM) with steps as fine as 150ps. Six enhanced capture units (eCAP) and two quadrature encoder interfaces (eQEP) on the TMS320F28335PTPQ enable precise multi-axis motion sensing. The analog subsystem of the TMS320F28335PTPQ includes a 12-bit, 16-channel ADC with 80ns conversion time and dual sample-and-hold for simultaneous sampling. Communication on the TMS320F28335PTPQ is handled by two eCAN 2.0B modules, three SCI (UART), one SPI, one I2C, and a multi-channel buffered serial port (McBSP). An external memory interface (XINTF) of the TMS320F28335PTPQ allows connection to external SRAM, Flash, or FPGAs. Thanks to its hardware floating-point unit and high-resolution PWM, the TMS320F28335PTPQ excels in automotive electronics, servo drives, renewable energy inverters, and advanced digital power supplies. The free Code Composer Studio IDE and C2000Ware software suite help accelerate development from prototype to production.

TMS320F28335PTPQ Core Features

Processor Core: The TMS320F28335PTPQ features a 32-bit C28x fixed-point CPU + single-precision floating-point unit (FPU), running at 150MHz (300MFLOPS)

On-Chip Memory: The TMS320F28335PTPQ provides 512KB Flash + 68KB SRAM + Boot ROM

DMA: The TMS320F28335PTPQ includes a 6-channel DMA for autonomous data transfers, reducing CPU load

Enhanced PWM (ePWM): The TMS320F28335PTPQ offers 6 ePWM modules, 12 PWM outputs total; 6 channels with high-resolution (HRPWM) down to 150ps, with dead-time and fault protection

Capture & Encoder: The TMS320F28335PTPQ provides 6 eCAP and 2 eQEP for precise position, velocity measurement and pulse capture

Analog Front-End: The TMS320F28335PTPQ features a 12-bit ADC with 16 channels, 80ns conversion (12.5MSPS), and dual S/H for simultaneous sampling

Communication: The TMS320F28335PTPQ supports 2× eCAN 2.0B, 3× SCI (UART), 1× SPI, 1× I2C, and 1× McBSP/SPI

External Interface: The TMS320F28335PTPQ includes an XINTF memory interface supporting external SRAM, Flash, and FPGA expansion

System: The TMS320F28335PTPQ features on-chip PLL, watchdog, power management, and up to 88 GPIO

Temperature Range: The TMS320F28335PTPQ is AEC-Q100 automotive grade, -40°C to +125°C

Package: The TMS320F28335PTPQ comes in a 176-lead LQFP (PTP) package

TMS320F28335PTPQ Applications

Automotive: The TMS320F28335PTPQ excels in electric power steering (EPS), engine management, transmission control, OBC, and DC/DC converters

Industrial Motor Control: The TMS320F28335PTPQ is ideal for high-performance servo drives, robotics, CNC, and textile machinery

Digital Power: The TMS320F28335PTPQ is used in solar inverters, energy storage PCS, UPS, and LLC resonant converters

Renewable Energy: The TMS320F28335PTPQ supports wind turbine converters and battery formation & test systems

General High-Performance Control: The TMS320F28335PTPQ suits complex embedded systems requiring floating-point math, high-resolution PWM, and real-time acceleration

TMS320F28335PTPQ Key Advantages

Hardware Floating-Point Acceleration: The TMS320F28335PTPQ's integrated IEEE 754 FPU executes FOC, Kalman filters, and PID controllers significantly faster than fixed-point cores, simplifying code and improving precision.

High-Resolution PWM: The TMS320F28335PTPQ's six HRPWM channels achieve 150ps duty-cycle resolution, meeting the demands of high-precision digital power and micro-stepping motor control while reducing output ripple and torque pulsations.

Enhanced DMA: The TMS320F28335PTPQ's six DMA channels automatically move ADC results and communication data, freeing the CPU for core algorithms and boosting real-time performance.

Large Memory & Expansion: The TMS320F28335PTPQ's 512KB Flash and 68KB SRAM easily host complex programs; its XINTF interface enables seamless expansion with external SRAM or FPGAs.

Flexible Control Peripherals: The TMS320F28335PTPQ's 12 ePWM channels (6 HRPWM), 6 eCAP, and 2 eQEP support dual three-phase motor FOC, multi-level converters, and multi-axis motion control.

Automotive-Grade Reliability: The TMS320F28335PTPQ's AEC-Q100 certification and -40°C to +125°C range guarantee stable operation in engine compartments and harsh industrial environments.

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FAQ

1. What does “PTPQ” stand for on the TMS320F28335PTPQ?
   
   • “PTP” designates the 176-lead LQFP package; “Q” indicates AEC-Q100 automotive qualification with a -40°C to +125°C temperature range.
2. How does the TMS320F28335PTPQ differ from the TMS320F2812?
   
   • The TMS320F28335PTPQ adds a hardware floating-point unit (FPU) for faster math execution.
   • The TMS320F28335PTPQ uses advanced ePWM/HRPWM modules instead of the legacy event managers, offering more flexible and higher-resolution PWM.
   • Additional 6-channel DMA and larger memory (512KB Flash, 68KB SRAM) support more complex real-time systems.
3. What are the benefits of the FPU in control systems on the TMS320F28335PTPQ?
   
   • Algorithms like FOC and PID can be written directly with floating-point variables on the TMS320F28335PTPQ, eliminating the need for fixed-point scaling and overflow checks, while improving precision.
4. How many three-phase motors can the TMS320F28335PTPQ control?
   
   • The 12 ePWM channels (6 pairs) on the TMS320F28335PTPQ can drive two three-phase motors simultaneously; two eQEP modules support independent encoder feedback for dual-axis servo control.
5. What resolution does HRPWM provide on the TMS320F28335PTPQ?
   
   • HRPWM micro-stepping on the TMS320F28335PTPQ delivers approximately 150ps resolution, enabling extremely high-precision duty cycles even at high switching frequencies.
6. What is the advantage of the integrated DMA on the TMS320F28335PTPQ?
   
   • The 6-channel DMA on the TMS320F28335PTPQ automatically moves data from ADC and peripherals to memory, offloading the CPU and improving overall system real-time response.
7. What can be connected to the XINTF interface of the TMS320F28335PTPQ?
   
   • XINTF on the TMS320F28335PTPQ supports external asynchronous SRAM, NOR Flash, ADCs, DACs, or FPGAs, expanding storage and adding custom hardware acceleration.
8. What software tools are needed for developing with the TMS320F28335PTPQ?
   
   • TI’s free Code Composer Studio (CCS) with C2000Ware provides libraries and examples for motor control and digital power; XDS100/XDS200 JTAG debuggers are recommended for the TMS320F28335PTPQ.
9. Does the ADC on the TMS320F28335PTPQ support simultaneous sampling?
   
   • Yes, the ADC on the TMS320F28335PTPQ has two sample-and-hold circuits, allowing simultaneous sampling of two channels for accurate motor phase current/voltage measurement.
10. What are the upgrade options for higher performance than the TMS320F28335PTPQ?
    
    • The TMS320F2837x family offers dual C28x cores, higher clock speeds, and more advanced peripherals. The Concerto series adds an ARM Cortex co-processor for further integration.