DSPIC33EP128GS702-E/SO - 16-bit 60 MIPS DSC, 128KB Flash | Microchip
MPN: DSPIC33EP128GS702-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.9 | $5.90 |
| 10 | $5.45 | $54.50 |
| 100 | $4.85 | $485.00 |
| 500 | $4.35 | $2,175.00 |
| 1,000 | $3.95 | $3,950.00 |
DSPIC33EP128GS702-E/SO Overview
A digital signal controller combines the compute architecture of a microcontroller with the math acceleration of a DSP. Within the power-management hierarchy, a DSC such as the dsPIC33EP GS family sits at the center of digital switch-mode power supply (SMPS) control loops, replacing analog PWM controllers with a programmable, firmware-defined control engine that executes Proportional-Integral-Derivative (PID) and multi-loop compensation in real time.
Key features include dual-partition Flash supporting live firmware updates, integrated high-speed PWM peripherals purpose-built for digital power conversion, DSP engine instructions (MAC, DSP multiply-accumulate) for fast control-loop math, and Functional Safety (FuSa) documentation support per Microchip's product page. The GS-series analog and PWM resources make it possible to implement AC/DC, DC/DC, and power-factor-correction topologies on a single chip.
Architecturally, the dsPIC33EP core is a modified Harvard 16-bit machine with a single-cycle MAC and hardware divide support. Code and data buses operate independently, allowing the control loop to sample, compute, and update PWM duty cycles within one PWM period at 60 MIPS.
Typical applications include digital SMPS (buck, boost, LLC, PFC) controllers, automotive power conversion, solar micro-inverters, LED drivers, battery chargers, and industrial motor control where a deterministic, programmable controller is preferred over fixed-function analog PWM ICs.
Design consideration: supply decoupling and PCB layout of the power ground versus analog ground matter for ADC accuracy; follow Microchip's digital power reference designs for loop compensation.
This page adds value beyond the manufacturer datasheet by consolidating drop-in alternatives, comparison tables, and practical design notes in one place.
Drop-in alternatives for DSPIC33EP128GS702-E/SO — 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 DSPIC33EP128GS702-E/SO (same form factor and footprint) — differing in Core Architecture, Operating Temperature, Package, Qualification, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GS702-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128GP502-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128GP502-H/SO
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →DSPIC33EP64GS702-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GS702-E/2N
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128GS702-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC |
| Maximum CPU Speed | 60 MIPS |
| Flash Program Memory | 128KB (43K x 24) |
| RAM | 8KB |
| Supply Voltage | 3.3 V |
| Package | 28-SOIC (0.295 in, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (E grade) |
| Qualification | AEC-Q100 automotive, recommended for automotive design |
| Functional Safety Support | FuSa (Functional Safety) supported |
| Flash Partitioning | Dual Partition Flash |
| DSP Engine | Single-cycle MAC DSP instructions |
| Target Applications | SMPS and digital power conversion |
| Terminal Form | Gull Wing |
| Packaging Option | Tube (per distributor listing) |
DSPIC33EP128GS702-E/SO 28-soic (0.295 in, 7.50 mm width) Pin Configuration Guide
Pin configuration for DSPIC33EP128GS702-E/SO (28-soic (0.295 in, 7.50 mm width) 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 DSPIC33EP128GS702-E/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GS702-E/SO is suitable for 6 applications: Digital Switch-Mode Power Supplies (SMPS), Automotive Power Conversion, Solar Micro-Inverters and PFC, Battery Chargers, Industrial LED Drivers, Motor Control and Industrial Automation.
Digital Switch-Mode Power Supplies (SMPS)
The DSPIC33EP128GS702-E/SO was purpose-built for digital switch-mode power supply control. Its GS-series high-speed PWM peripherals and 60 MIPS 16-bit core with single-cycle MAC execute Proportional-Integral-Derivative compensation inside one switching period for buck, boost, flyback, LLC, and phase-shifted full-bridge topologies. Sampling with the on-chip ADC and updating duty cycles in firmware enables programmable loop shaping, non-linear gain scheduling, and adaptive dead-time - capabilities fixed-function analog PWM controllers cannot offer. Placed as the sole controller in an AC/DC or DC/DC power stage, it typically achieves control-loop latencies in the microsecond range while dual-partition Flash allows field firmware updates without power interruption.
Recommended
Automotive Power Conversion
With its E temperature grade (-40C to +125C), AEC-Q100 alignment, and Microchip's explicit 'Recommended for Automotive Design' status, the DSPIC33EP128GS702-E/SO fits automotive DC-DC converters, LED headlight drivers, and auxiliary power modules. The Functional Safety (FuSa) documentation support eases safety analyses required by tier-1 suppliers, and dual-partition Flash enables OTA-style firmware updates in the field - increasingly mandatory in vehicles. A 60 MIPS control core closes current loops in a 400 kHz automotive buck converter with margin, while the wide -40C to +125C operating range covers underhood and battery-located environments where commercial-grade controllers cannot survive.
Recommended
Solar Micro-Inverters and PFC
Grid-tied micro-inverters and power-factor-correction stages need two coordinated control loops: a fast current loop shaping the input current and a slower voltage loop regulating the bus. The DSPIC33EP128GS702-E/SO runs both on its 60 MIPS core, with the GS-series PWM modules generating interleaved, phase-shifted drive signals at high resolution. The DSP multiply-accumulate engine handles sine-reference generation and RMS computation without stealing loop time. Per Microchip, the dsPIC33EPXXGS70X/80X family directly targets AC power conversion including PFC, and the 8KB RAM holds lookup tables and protection state machines typical of inverter firmware.
Recommended
Battery Chargers
Multi-chemistry battery charging requires sequenced constant-current and constant-voltage phases with termination detection and thermal supervision - all naturally implemented in firmware on the DSPIC33EP128GS702-E/SO. The 60 MIPS core closes the charging current loop, the ADC samples pack voltage, current, and temperature, and the GS-series PWM drives the power stage with programmable dead-time. Dual-partition Flash lets manufacturers update charging profiles in the field as battery chemistries evolve. The extended -40C to +125C E-grade suits e-bike, power-tool, and automotive onboard charger environments, where charge controllers are mounted close to hot power stages.
Recommended
Industrial LED Drivers
High-power industrial and architectural lighting demands accurate, flicker-free current regulation with dimming control and fault protection. The DSPIC33EP128GS702-E/SO drives LED string current loops from its GS-series high-speed PWMs at 60 MIPS, implementing average-current-mode control in firmware with programmable dimming curves (PWM, analog, or hybrid). Its 128KB Flash stores multi-scenario lighting profiles, and dual-partition Flash enables feature upgrades after installation. The -40C to +125C automotive-grade temperature range tolerates sealed driver enclosures that regularly exceed 85C ambient, and the 28-SOIC footprint keeps the controller cost and board area proportionate to the driver.
Recommended
Motor Control and Industrial Automation
Beyond power supplies, the DSPIC33EP128GS702-E/SO executes field-oriented control (FOC) and trapezoidal control for BLDC and PMSM motors. The 60 MIPS core with DSP MAC runs Clarke/Park transforms and the current-loop PI stages in real time, while the GS-series PWM modules generate complementary center-aligned drive with programmable dead-time for three-phase bridges. The on-chip ADC synchronized to the PWM trigger samples phase currents at the optimal low-noise instant. The extended temperature grade and AEC-Q100 alignment also suit servo drives and factory automation equipment near heat sources, and dual-partition Flash supports firmware updates on installed machinery.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GS702-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GS702-I/SO | DSPIC33EP128GP502-E/SO | DSPIC33EP64GS702-E/SO | DSPIC33EP128GS702-E/2N |
|---|---|---|---|---|---|
| Package | 28-SOIC (0.295 in, 7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-UQFN (6x6 mm) - different footprint, same pin functions |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS |
| Flash Memory | 128KB (43K x 24) | 128KB (43K x 24) | 128KB (43K x 24) | 64KB (-50%) | 128KB (43K x 24) |
| RAM | 8KB | 8KB | 8KB | 8KB | 8KB |
| Peripheral Family | GS (digital power / SMPS PWM) | GS (digital power) | GP (general purpose) | GS (digital power) | GS (digital power) |
| Temperature Grade | -40C to +125C (E, automotive) | -40C to +85C (I, industrial) | -40C to +125C (E, automotive) | -40C to +125C (E, automotive) | -40C to +125C (E, automotive) |
| Qualification | AEC-Q100 aligned, automotive recommended | Industrial grade, not automotive | E grade automotive package option | Automotive recommended | AEC-Q100 aligned, automotive recommended |
Key Differentiators
- GS-series digital-power PWM subsystem (vs DSPIC33EP128GP502-E/SO)
- Automotive E-grade temperature rating (vs DSPIC33EP128GS702-I/SO)
- Twice the program memory of the family's smaller variant (vs DSPIC33EP64GS702-E/SO)
- Same die in a space-saving option (vs DSPIC33EP128GS702-E/2N)
Design Notes
For digital power layouts, keep the dsPIC33EP128GS702-E/SO ground reference star-connected to the power-stage source/shunt returns. Place the ADC sense routing (shunt amplifier outputs to analog inputs) away from PWM switching nodes to prevent kickback noise corrupting current-loop samples. Microchip's GS-family digital power reference designs route a dedicated analog ground plane under the controller and connect it at a single point to the power ground. Decouple each VDD/VSS pair with 100 nF ceramics placed within a few millimeters of the pins.
Do not assume code written for GP-series dsPIC33EP parts (e.g., DSPIC33EP128GP502) runs unmodified on this GS device: the GS digital-power PWM and analog subsystems have different register maps. Similarly, when substituting DSPIC33EP128GS702-I/SO (industrial) for the -E/SO in automotive programs, verify that your customer's qualification flow accepts industrial-grade parts - many automotive programs require the E-grade certificates. Also confirm ADC sampling synchronized to PWM triggers is configured before enabling the power stage, or first-cycle current spikes can trip protections.
The device operates from a 3.3V supply; generate this from an auxiliary buck (e.g., an MCP16301 class regulator) fed from the power-stage bus. Estimated: controller current draw is in the tens-of-milliamps range at 60 MIPS (per family data sheet typical figures), so a 50-100 mA auxiliary rail provides margin for I/O drive of gate-driver inputs. Ensure auxiliary rail sequencing powers the controller before the power stage, or use the PWM module's enable gating so outputs stay inactive until firmware initializes loops.
Use dual-partition Flash deliberately: reserve one partition for the field-updatable application and the other for a minimal, never-updated recovery bootloader. This guarantees a rollback path if an update fails in a shipped power supply. Budget flash accordingly - with 128KB total, a 48KB application plus a 16KB bootloader per partition still leaves headroom for diagnostics and data logging.
Compliance Information
Distributor listings tag this part 'Automotive, AEC-Q100' and Microchip's product page states 'Recommended for Automotive Design' with Functional Safety (FuSa) support. RoHS/REACH/lead-free status not stated in retrieved data - verify via Microchip product page compliance documents.
