DSPIC33EP256GP502-I/SO Microchip dsPIC33EP 16-Bit Digital Signal Controller 70MIPS 256KB Flash Advanced PWM SOIC-28

DSPIC33EP256GP502-I/SO Product Overview

The DSPIC33EP256GP502-I/SO from Microchip is a high-capacity 16-bit Digital Signal Controller (DSC) in a 28-lead wide-body SOIC package, designed for general-purpose embedded applications requiring massive program storage, flexible power control, and a compact footprint. Based on the dsPIC33E core running at 70 MIPS, the DSPIC33EP256GP502-I/SO features 256KB of Flash and 16KB of SRAM, effortlessly hosting extremely complex control algorithms, digital filtering, and communication stacks with top-tier memory headroom. Core peripherals of the DSPIC33EP256GP502-I/SO include a flexible advanced high-speed PWM module (up to four independent outputs configurable as complementary pairs with programmable dead-time), a 10-bit high-speed ADC (up to 1.1 Msps with up to six analog input channels), and two analog comparators, making the DSPIC33EP256GP502-I/SO suitable for various power conversion, lighting control, and general power management applications. Communication interfaces on the DSPIC33EP256GP502-I/SO include UART, SPI, and I2C. Operating from 3.0V to 3.6V with an industrial temperature range of -40°C to +85°C, the SOIC-28 package of the DSPIC33EP256GP502-I/SO facilitates manual soldering and automated production, making the DSPIC33EP256GP502-I/SO ideal for space-constrained mid-to-high-end digital power supplies, LED drivers, industrial sensors, and general-purpose real-time control applications requiring abundant code space.

DSPIC33EP256GP502-I/SO Core Features

Processor Core: The DSPIC33EP256GP502-I/SO features a 16-bit dsPIC33E core running at 70 MIPS, with a DSP-enhanced instruction set (single-cycle MAC)

Program Memory: The DSPIC33EP256GP502-I/SO provides 256KB Flash, In-Circuit Self-Programmable

Data Memory: The DSPIC33EP256GP502-I/SO includes 16KB SRAM, providing top-tier storage for complex algorithms and real-time data buffering

Advanced PWM Module: The DSPIC33EP256GP502-I/SO offers up to 4 independent PWM outputs (configurable as complementary pairs) with programmable dead-time and fault protection for general power control, power management, and lighting

High-Speed ADC: The DSPIC33EP256GP502-I/SO integrates a 6-channel 10-bit ADC up to 1.1 Msps for real-time control and data acquisition

Integrated Analog Comparators: The DSPIC33EP256GP502-I/SO includes 2 analog comparators (with programmable references) for fast overcurrent protection or peak current-mode control

Communication Interfaces: The DSPIC33EP256GP502-I/SO supports 1x UART, 1x SPI, and 1x I2C

Signal Processing & Timers: The DSPIC33EP256GP502-I/SO features rich input captures, output compares/standard PWMs, and multiple 16/32-bit timers

Safety & System Management: The DSPIC33EP256GP502-I/SO includes a hardware CRC engine, watchdog timer, and BOR/POR

Power Supply: The DSPIC33EP256GP502-I/SO operates from a 3.0V to 3.6V single supply with an on-chip voltage regulator

Package: The DSPIC33EP256GP502-I/SO comes in SOIC-28 (wide body 7.50mm), industrial temperature range -40°C to +85°C

DSPIC33EP256GP502-I/SO Applications

Digital Power & Converters: The DSPIC33EP256GP502-I/SO excels in high-density DC/DC converters, AC/DC adapters, LED drivers, and battery chargers

Industrial Sensors & Transmitters: The DSPIC33EP256GP502-I/SO is ideal for pressure transmitters, temperature controllers, and 4-20mA transmitters

General Motor Control: The DSPIC33EP256GP502-I/SO supports small BLDC motors, fan and pump drives (six-step commutation via advanced PWM)

Automotive Accessories: The DSPIC33EP256GP502-I/SO is used in in-cabin LED lighting, small actuator control, and sensor interfaces

Consumer & Appliances: The DSPIC33EP256GP502-I/SO suits high-end appliance controllers, power tools, and smart lighting

IoT Edge Nodes: The DSPIC33EP256GP502-I/SO supports data acquisition terminals requiring powerful local DSP processing and massive program memory

DSPIC33EP256GP502-I/SO Key Advantages

Massive Memory & High Integration: The DSPIC33EP256GP502-I/SO's 256KB Flash and 16KB SRAM provide extremely generous code and data space, accommodating complex algorithms, communication stacks, and user interfaces, easily handling full-lifecycle feature upgrades without external memory

Flexible Advanced PWM: The DSPIC33EP256GP502-I/SO offers up to 4 independent outputs configurable as complementary pairs with dead-time control, suitable for buck, boost, half/full-bridge, and other common topologies, covering most power conversion and general power control needs

70 MIPS Efficient DSP Performance: The DSPIC33EP256GP502-I/SO's dsPIC33E core with single-cycle MAC executes digital filtering, PID control, and digital power loop algorithms at high speed, easily meeting high-frequency switching and fast sampling demands

Compact Manufacturing-Friendly SOIC-28: The DSPIC33EP256GP502-I/SO's wide-body SOIC package balances manual soldering convenience with a small PCB footprint, ideal for space-constrained designs and low-to-medium volume production

Integrated Analog Protection: The DSPIC33EP256GP502-I/SO's two on-chip analog comparators enable fast overcurrent protection or peak current-mode control, significantly reducing external component count while improving system reliability and lowering BOM cost

Industrial Temperature Range: The DSPIC33EP256GP502-I/SO operates from -40°C to +85°C, ensuring reliable operation in harsh environments

Mature Development Toolchain: The DSPIC33EP256GP502-I/SO is supported by free MPLAB X IDE and XC16 compiler, with MCC code configurator, extensive algorithm libraries, and reference designs accelerating time-to-market

Long-Term Availability: The DSPIC33EP256GP502-I/SO is a mature dsPIC33E GP family general-purpose DSC with long lifecycle and stable supply commitment

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FAQ

1. What is the DSPIC33EP256GP502-I/SO?
   The DSPIC33EP256GP502-I/SO is a high-capacity general-purpose 16-bit Digital Signal Controller (DSC) from Microchip in a 28-lead SOIC package, running at 70 MIPS with 256KB Flash, 16KB SRAM, integrated advanced PWM, 10-bit ADC, and analog comparators—ideal for digital power, sensors, and general power control.
2. What does the “-I/SO” suffix mean on the DSPIC33EP256GP502-I/SO?
   “-I” indicates the industrial temperature range (-40°C to +85°C), and “/SO” denotes the 28-lead wide-body SOIC package of the DSPIC33EP256GP502-I/SO.
3. How does the GP series differ from the MC series in the context of the DSPIC33EP256GP502-I/SO?
   The GP (General Purpose) series, including the DSPIC33EP256GP502-I/SO, lacks dedicated motor-control PWM and Quadrature Encoder Interfaces (QEI), but offers flexible advanced PWM, analog comparators, and general communication interfaces, making it ideal for power conversion, lighting, and industrial sensors. The MC (Motor Control) series adds motor-specific PWM and QEI for servo and precision motor control.
4. Does the DSPIC33EP256GP502-I/SO have a CAN bus?
   No, this 28-lead GP-series model of the DSPIC33EP256GP502-I/SO does not include a CAN controller. For CAN connectivity, consider GP variants in larger packages (e.g., 44- or 64-lead) with integrated CAN, or add an external SPI CAN controller.
5. What are the advantages of 256KB Flash and 16KB SRAM on the DSPIC33EP256GP502-I/SO?
   This is the top-tier memory configuration in the series, accommodating extremely complex control algorithms, multi-protocol communication stacks, graphical user interfaces, and field-upgradeable firmware on the DSPIC33EP256GP502-I/SO, providing exceptionally generous headroom for full-lifecycle feature expansion and eliminating code-size concerns.
6. What applications can the advanced PWM of the DSPIC33EP256GP502-I/SO support?
   With up to 4 independent outputs or 2 complementary pairs with dead-time, the DSPIC33EP256GP502-I/SO is well-suited for DC/DC converters, LED drivers, half/full-bridge topologies, and various power management and lighting applications requiring precise duty-cycle control. It can also implement six-step commutation for simple BLDC motors but lacks dedicated hardware for FOC.
7. What development tools are supported for the DSPIC33EP256GP502-I/SO?
   The DSPIC33EP256GP502-I/SO is supported by Microchip’s free MPLAB X IDE and MPLAB XC16 compiler, along with PICkit or ICD series debuggers and MPLAB Code Configurator (MCC) for rapid development.
8. Does the DSPIC33EP256GP502-I/SO have an internal oscillator, or is an external crystal required?
   The DSPIC33EP256GP502-I/SO features an internal high-speed RC oscillator with an on-chip PLL; no external crystal is required. For applications demanding high clock precision, an external crystal or ceramic resonator is recommended.
9. Is the DSPIC33EP256GP502-I/SO suitable for motor control?
   The DSPIC33EP256GP502-I/SO is suitable for simple motor applications that do not require advanced vector control (FOC), such as brushed DC motors or BLDC motors using six-step commutation. For precision servo control requiring FOC and encoder feedback, consider the MC series with dedicated motor-control PWM and QEI.
10. Is the DSPIC33EP256GP502-I/SO suitable for new designs?
    The DSPIC33EP256GP502-I/SO is a mature, well-supplied general-purpose DSC with massive memory and flexible power-control peripherals. For new designs that do not require dedicated motor-control hardware or CAN but need abundant code space and excellent DSP performance, the DSPIC33EP256GP502-I/SO remains a cost-effective and reliable choice with long-term availability.