Texas Instruments TMS320F28235PTPS

Overview

TMS320F28235PTPS from Texas Instruments is a 150-MHz C2000™ real-time microcontroller with 256K × 16 flash, 34K × 16 SARAM, 12-bit 16-channel ADC (80-ns conversion), dual CAN modules, and 176-pin HLQFP package rated for –40°C to 125°C operation. It serves as the control core in high-precision motor drives and digital power converters requiring deterministic interrupt response and on-chip analog integration.

For engineers reviewing the TMS320F28235PTPS datasheet, TMS320F28235PTPS pinout, TMS320F28235PTPS application, or TMS320F28235PTPS equivalent, key selection criteria include CPU clock stability at 150 MHz, HRPWM resolution (150-ps MEP), eCAP/eQEP peripheral count, XINTF interface width, and thermal grade compliance for industrial inverter designs.

Technical Context

This MCU implements a 32-bit TMS320C28x CPU with Harvard architecture, unified memory model, and IEEE 754 single-precision FPU excluded (F2823x family). It executes deterministic real-time control loops using three 32-bit CPU timers, PIE-interrupt expansion for 58 peripherals, and 128-bit security lock for flash/SARAM/OTP.

Peripheral integration includes six ePWM modules (12 outputs), six HRPWM channels with 150-ps MEP resolution, six eCAP inputs, two eQEP interfaces, dual CAN 2.0B controllers, three SCI (UART-compatible), two McBSP/SPI, one SPI, and one I²C-all accessible via DMA channels routed to ADC, ePWM, McBSP, XINTF, and SARAM.

Key Specifications

Pinout & Package

176-pin Thermally Enhanced Low-Profile Quad Flatpack (HLQFP), 24.0 mm × 24.0 mm body, 0.5-mm pitch, exposed thermal pad. Pinout validated per TI SPRS439Q Rev Q, Section 6.1 (PGF/PTP LQFP pin assignments).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28235PTPS, the TMS320F28335PTP adds FPU capability for floating-point math but shares identical packaging, temperature rating, and peripheral configuration; the TMS320F28234PTP reduces flash capacity while maintaining all other electrical and mechanical specifications.

Availability

TMS320F28235PTPS is available at Aetrix Electronics and suitable for industrial motor drives, grid-tied inverters, and on-board EV chargers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TMS320F28235PTPS 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 specializing in analog, embedded processing, and connectivity technologies, with leadership in real-time control MCUs for industrial and automotive markets.

The TMS320F28235PTPS belongs to TI's C2000™ real-time microcontroller product line, designed specifically for closed-loop control in motor drives, digital power, and energy systems where deterministic timing and integrated analog peripherals are critical.

FAQ

What is the maximum operating frequency of the TMS320F28235PTPS?

The TMS320F28235PTPS operates at up to 150 MHz (6.67-ns cycle time) when powered by a 1.9-V core supply. At 1.8-V core, it supports 100 MHz operation. This frequency governs instruction execution, peripheral timing, and PWM resolution - all critical for high-bandwidth control loops in the TMS320F28235PTPS.

Does the TMS320F28235PTPS include a floating-point unit (FPU)?

No, the TMS320F28235PTPS does not include an IEEE 754 single-precision floating-point unit. The FPU is present only in the F2833x series (e.g., TMS320F28335PTP). The TMS320F28235PTPS relies on fixed-point arithmetic optimized for C28x instruction set, which remains highly efficient for standard motor control and power conversion algorithms.

What package type and thermal rating does the TMS320F28235PTPS use?

The TMS320F28235PTPS uses a 176-pin Thermally Enhanced Low-Profile Quad Flatpack (HLQFP), designated "PTP" in TI's nomenclature. It is rated for operation from –40°C to 125°C (S-grade), making it suitable for demanding industrial environments such as traction inverters and on-board EV chargers where ambient temperatures exceed 105°C.

How many PWM and HRPWM outputs does the TMS320F28235PTPS support?

The TMS320F28235PTPS supports six ePWM modules generating up to 12 complementary PWM outputs, plus six HRPWM outputs with 150-ps minimum pulse width resolution. These are implemented in hardware and fully synchronized - a key capability leveraged in the TMS320F28235PTPS for SiC/GaN-based resonant converters and multi-level inverter topologies.

Is the TMS320F28235PTPS pin-compatible with other F2823x or F2833x devices?

Yes, the TMS320F28235PTPS is pin-compatible with other PTP-packaged F2823x devices (e.g., TMS320F28234PTP, TMS320F28232PTP) and shares the same 176-pin HLQFP footprint as TMS320F28335PTP. However, functional differences - such as absence of FPU in TMS320F28235PTPS - require software validation during migration.