DSPIC33EP128GS704-I/PT - 16-bit 70 MIPS DSC 128KB Flash | Microchip
MPN: DSPIC33EP128GS704-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.1 | $6.10 |
| 10 | $5.55 | $55.50 |
| 25 | $5.3 | $132.50 |
| 100 | $4.85 | $485.00 |
| 1,000 | $4.2 | $4,200.00 |
DSPIC33EP128GS704-I/PT Overview
A digital signal controller combines the computational throughput of a digital signal processor (DSP) with the control peripherals and ease of use of a microcontroller (MCU). Within the power management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP: it executes control-loop firmware while integrating specialized analog and PWM peripherals, making it the single-chip backbone of modern switch-mode power supplies and digital power conversion systems.
The GS70X/80X family is purpose-built for SMPS (switched-mode power supply) and digital power conversion. Key differentiating features include dedicated high-resolution PWM hardware supporting multi-loop control, dual partition Flash enabling live firmware updates during operation, and Microchip Functional Safety (FuSa) package support for safety-critical designs. The 70 MIPS core with DSP instruction extensions (MAC, DSP multiply-accumulate) sustains the tight loop timing that digital power converters demand.
Architecturally, the dsPIC33EP core pairs a 16-bit pipeline with DSP-enhanced instructions and fast interrupt context switching, allowing control laws for AC/DC converters, power factor correction, and LLC/resonant topologies to run deterministically. The dual-partition Flash architecture is a standout: firmware can execute from one partition while the other is erased and reprogrammed, supporting field upgrades without power interruption - critical for servers and telecom rectifiers that must not go offline.
Typical applications include AC to DC converters, interleaved power factor correction (PFC) stages (Microchip offers a 350W interleaved PFC reference design based on this controller), DC/DC converters, uninterruptible power supplies, solar micro-inverters, and battery chargers.
For design, plan the PWM dead-time and ADC trigger alignment carefully; the high-resolution PWM is designed for precisely this coordination. Verify that the 8KB SRAM is sufficient for your control state machine plus communications stack.
This page synthesizes distributor pricing, drop-in alternatives within the dsPIC33EP family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP128GS704-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPIC33EP128GS704-I/PT (same form factor and footprint) — differing in Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GS704-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256GS704-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS704-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GM304T-I/PT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33EP128GM304-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.2 / Unit
View Datasheet →DSPIC33EP128GS704-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC |
| Maximum CPU Speed | 70 MIPS |
| Flash Memory | 128 KB (43K x 24) |
| SRAM | 8 KB |
| Supply Voltage | 3.3 V |
| Package | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Product Family | dsPIC33EP GS70X/80X (SMPS & Digital Power Conversion) |
| Flash Partitions | Dual Partition Flash |
| Functional Safety Support | Yes (FuSa) |
| PWM | High-resolution PWM for SMPS |
| Programming/Debug | ICSP via PGECx/PGEDx pairs |
| Data Bus Width | 16 bit |
| Typical Applications | AC-DC converters, PFC, DC-DC, digital SMPS |
DSPIC33EP128GS704-I/PT 44-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP128GS704-I/PT (44-tqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33EP128GS704-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GS704-I/PT is suitable for 6 applications: AC to DC Converters, Interleaved Power Factor Correction (PFC), DC to DC Converters and Point-of-Load Supplies, Uninterruptible Power Supplies (UPS), Solar Micro-Inverters and Renewable Energy Converters, Battery Chargers and Battery Management.
AC to DC Converters
The DSPIC33EP128GS704-I/PT is explicitly listed by Microchip as a controller for AC to DC converters within the GS70X/80X digital power family. Its 70 MIPS 16-bit core executes voltage- and current-mode control loops with DSP multiply-accumulate instructions, while the dedicated high-resolution PWM module generates precisely timed gate drive signals for the primary-side switching stage. Dual-partition Flash lets the converter firmware be updated in the field while the unit continues operating - important for always-on telecom and server power supplies. Placed as the single supervisory controller, it replaces multiple analog control ICs, consolidates protection logic (OVP, OCP, UVP) in firmware, and simplifies certification of digitally controlled front ends.
Recommended
Interleaved Power Factor Correction (PFC)
Microchip ships a 350W Interleaved PFC reference design based on SMPS dsPIC Digital Signal Controllers that works from universal AC input and produces a single high-voltage DC output - a directly citable proof point for the DSPIC33EP128GS704-I/PT in this role. Interleaved PFC requires two phase-shifted PWM channels and a fast average-current-mode loop; the high-resolution PWM delivers the phase offset with fine duty resolution, and the 70 MIPS core closes the current loop each switching cycle. Firmware computes RMS line voltage, power limiting, and THD-friendly shaping without a separate DSP. Starting from the reference design firmware significantly shortens time-to-market versus writing control code from scratch.
Recommended
DC to DC Converters and Point-of-Load Supplies
For secondary-side DC/DC stages such as half-bridge, full-bridge, buck, and LLC converters, the DSPIC33EP128GS704-I/PT provides multi-loop control (voltage loop plus current-sharing loop) from one chip. The 8KB SRAM holds the control state machine, digital compensators, and telemetry buffers, while the SMPS-optimized PWM module offers the dead-time control and complementary outputs that resonant topologies require. Compared with analog controllers, firmware-based control adapts compensation to load transients and supports PMBus-style telemetry, easing integration into managed power shelves. The -40C to +85C industrial grade of the /I suffix suits telecom outdoor and industrial cabinet environments without component derating.
Recommended
Uninterruptible Power Supplies (UPS)
A UPS requires coordinated control of an AC/DC rectifier, a DC/AC inverter, and a battery charger - exactly the multi-loop scenario Microchip targets with the GS70X/80X family. The DSPIC33EP128GS704-I/PT sequences these converters, manages mode transitions (line mode, battery mode, bypass), and executes anti-islanding and protection algorithms, all within the 70 MIPS core budget. Dual-partition Flash enables firmware field updates on units installed at customer sites without interrupting protected loads. The 44-TQFP pin count provides enough PWM channels for the inverter bridge plus auxiliary converters, and PPS (Peripheral Pin Select) routing keeps the PCB layout clean around the power stage.
Recommended
Solar Micro-Inverters and Renewable Energy Converters
Grid-tied micro-inverters demand maximum power point tracking (MPPT) running concurrently with grid-synchronized inverter control - a workload the DSPIC33EP128GS704-I/PT handles with its DSP-enhanced 16-bit core at 70 MIPS. The high-resolution PWM synthesizes the low-distortion output waveform while ADC-synchronized sampling captures panel voltage/current for the MPPT algorithm every switching cycle. Firmware-implemented grid protections (over/under voltage and frequency ride-through) can be revised in the field through dual-partition Flash as grid codes evolve. The 3.3V supply and -40C to +85C industrial rating match rooftop electronics exposed to wide ambient swings, and the single-chip approach keeps BOM cost competitive for high-volume solar manufacturing.
Recommended
Battery Chargers and Battery Management
Smart battery chargers need staged charging profiles (pre-charge, constant current, constant voltage, termination), safety supervision, and communication - the DSPIC33EP128GS704-I/PT implements all three in firmware on its 70 MIPS core. The high-resolution PWM regulates the charging converter with the precision needed for tight constant-voltage windows, while ADC feedback monitors cell voltage and temperature. Field-updatable dual-partition Flash allows charging profiles to be revised as battery chemistries or regulatory requirements change over product lifetime. According to Microchip, multi-loop digital SMPS support is a headline feature of this family, which directly covers the CC/CV dual-loop structure of a charger power stage.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GS704-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GS704-E/PT | DSPIC33EP256GS704-I/PT | DSPIC33EP64GS704-I/PT | DSPIC33EP128GM304-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB (43K x 24) | 128 KB (43K x 24) | 256 KB | 64 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| SMPS Digital-Power PWM | Yes (high-resolution, multi-loop) | Yes (identical) | Yes (identical) | Yes (identical) | No (general-purpose peripherals) |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Dedicated high-resolution SMPS PWM peripherals (vs DSPIC33EP128GM304-I/PT)
- Extended temperature option on identical die (vs DSPIC33EP128GS704-E/PT)
- Memory headroom without pin change (vs DSPIC33EP256GS704-I/PT)
- Dual-partition Flash for live field updates (vs DSPIC33EP128GS704-E/PT)
Design Notes
ICSP programming requires PGECx/PGEDx pairs to be used together - if PGEC2 carries ICSPCLK, ICSPDAT must route to PGED2. Mixing pins from different pairs is a common cause of programming failures. Reserve and label at least one full pair on your PCB test points, and do not load these pins heavily during programming. Per Microchip documentation, any pair may be used, but the pair selection must be consistent in both hardware and the programmer settings.
Supply the controller from a clean 3.3V rail; the SMPS PWM module toggles high-current gate drivers that inject noise into the digital supply. Decouple each VDD pin with 100 nF ceramic placed within 2 mm, plus bulk 10 uF near the device. Keep VDDCORE/VCAP circuitry per the datasheet layout guidelines. Estimated: with 70 MIPS operation, active current is on the order of tens of milliamps, but PWM driver currents dominate the rail budget - verify against the datasheet electrical characteristics table for your PWM configuration.
Route ADC feedback signals (current shunt, output voltage sense) away from PWM gate-drive traces to prevent switching transients from corrupting control-loop samples; synchronize ADC sampling away from switching edges using the PWM-triggered ADC feature. Use a solid ground plane and single-point connection between the digital ground and power-stage ground. The 44-TQFP thermal pad requirements are modest, but Estimated: at full 70 MIPS with all PWM outputs active, keep the power ground return path short to minimize ground bounce on the PPS-configured pins.
Peripheral Pin Select (PPS) lets you remap digital functions to many pins, which is powerful but error-prone: a mis-mapped UART or PWM output can silently fail or collide with an analog pin. Maintain a PPS mapping table in source control, verify it against the datasheet pin table for the 44-TQFP, and lock critical mappings (PWM outputs, ICSP pair) early in layout. Add 0 ohm jumper options on remappable pins during prototyping to recover from mapping mistakes without respinning the board.
Compliance Information
Compliance data for this exact ordering code was not present in the retrieved web data; verify on the Microchip product page or distributor compliance documents before export shipments.
