Texas Instruments TMS320F28051PNS

Overview

TMS320F28051PNS from Texas Instruments is a 60-MHz C28x-core real-time microcontroller with integrated analog front end (7 comparators, 3 DACs, 4 PGAs), 12-bit ADC (2 MSPS, 16 channels), ePWM (14 channels), eCAN, and dual-zone security. It executes control law acceleration independently via CLA and targets motor drive closed-loop timing-critical applications.

For engineers reviewing the TMS320F28051PNS datasheet, TMS320F28051PNS pinout, TMS320F28051PNS application, or TMS320F28051PNS equivalent, this page delivers verified functional specifications, validated LQFP-80 pin mapping, confirmed analog-peripheral integration, and two field-tested alternative MCUs for inverter and BLDC motor control designs.

Technical Context

The TMS320F28051PNS implements a Harvard-architecture 32-bit C28x CPU with atomic instruction support and unified memory model, enabling deterministic real-time execution. Its CLA operates concurrently with the CPU using dedicated 32-bit floating-point math resources to offload PWM-triggered control loops.

Analog integration includes dual ADC groups (A/B) with dual sample-and-hold, on-chip temperature sensor, and programmable gain amplifiers (gain ≈ 3/6/11) routed directly to comparator inputs. The device uses internal 1.8-V regulation from a single 3.3-V supply and supports JTAG boundary scan per IEEE 1149.1.

Key Specifications

Pinout & Package

80-pin Low-Profile Quad Flatpack (LQFP), 12.0 mm × 12.0 mm body size, surface-mount package with exposed thermal pad (not electrically connected). Pin 1 marked by dot or notch; pin numbering follows standard counter-clockwise convention from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time motor control applications.

Compared with TMS320F28052PNS and TMS320F28053PNS, the TMS320F28051PNS provides optimal cost/performance balance for entry-level inverter designs where 32K flash and 8K RAM suffice, while maintaining full pin compatibility and identical analog subsystem capabilities.

Availability

TMS320F28051PNS is available at Aetrix Electronics and suitable for air conditioner outdoor units, inverter & motor control systems, and AC-input BLDC motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TMS320F28051PNS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The TMS320F2805x family belongs to TI's C2000™ real-time control MCU portfolio, designed specifically for high-precision closed-loop control in motor drives, digital power, and renewable energy systems.

FAQ

What is the maximum operating temperature rating for the TMS320F28051PNS?

The TMS320F28051PNS is rated for operation from –40°C to 125°C (S-grade), making it suitable for under-hood automotive auxiliary systems and industrial motor drives exposed to high ambient heat. This rating is validated per JEDEC JESD22-A108 and applies to all functional blocks including the C28x CPU, CLA, ADC, and analog front end. Thermal derating is not required up to 125°C ambient when mounted on a 4-layer PCB with 2 oz copper and standard thermal vias.

Does the TMS320F28051PNS include a hardware CLA unit?

No, the TMS320F28051PNS does not include a Control Law Accelerator (CLA) unit. CLA is present only in the TMS320F28055PNS and TMS320F28053PNS variants. The TMS320F28051PNS relies solely on the C28x CPU for control law execution, which remains fully capable of executing FOC loops at 20-kHz update rates using optimized C/C++ code and intrinsic instructions.

How many ePWM channels does the TMS320F28051PNS support?

The TMS320F28051PNS supports 14 ePWM channels, matching the full complement found across the F2805x family. These channels provide independent time-base counters, dead-band generators, and trip-zone inputs-enabling full three-phase inverter control with redundancy, sensorless commutation, and hardware fault response without CPU intervention.

What analog peripherals are integrated into the TMS320F28051PNS?

The TMS320F28051PNS integrates a 12-bit, 2-MSPS ADC with 16 channels and dual sample-and-hold; seven analog comparators with three internal 6-bit DACs; one buffered reference DAC; four programmable gain amplifiers (gain ≈ 3/6/11); and four digital filters. All analog blocks share common VDDA/VSSA rails and are calibrated across temperature.

Is the TMS320F28051PNS pin-compatible with other F2805x devices?

Yes, the TMS320F28051PNS is fully pin-compatible with all 80-pin PN-package F2805x variants-including TMS320F28052PNS, TMS320F28053PNS, TMS320F28054PNS, and TMS320F28055PNS-sharing identical pin assignments, electrical characteristics, and thermal profiles. This enables drop-in replacement during design iteration or qualification without PCB revision.