DSPIC33EP32GS202-I/SO - 16-bit DSC 70MIPS 32KB Flash | Microchip
MPN: DSPIC33EP32GS202-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.35 | $4.35 |
| 10 | $3.95 | $39.50 |
| 100 | $3.55 | $355.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.9 | $2,900.00 |
DSPIC33EP32GS202-I/SO Overview
A digital signal controller is a hybrid of a microcontroller (MCU) and a digital signal processor (DSP): it combines a CPU, Flash, RAM and peripherals with DSP-class multiply-accumulate (MAC) instructions and high-speed analog peripherals. Within the power-management hierarchy, a DSC sits above generic MCUs for closed-loop switch-mode power conversion, where deterministic interrupt latency and fast ADC sampling are critical. The dsPIC33EP GS family is Microchip's digital-power-optimized branch of the dsPIC33EP 16-bit core family.
Key features of this part include 70 MIPS execution at 3.3V, a 32KB (32K x 8) self-programming Flash with ECC-class error handling, and integration purpose-built for switched-mode power supplies (SMPS): high-speed analog comparators, dedicated PWM with dead-time control, and fast ADC sampling tailored to current-mode control loops. It is a CMOS device specified across the industrial -40C to +85C temperature range at a nominal 3.3V supply (up to 3.6V absolute).
Architecturally, the dsPIC33EP core uses a modified Harvard pipeline with DSP multiply-accumulate and barrel-shifter instructions, letting firmware execute PI/PID compensation and reference modulation inside very short control-loop periods. The GS (digital power) variant adds analog peripherals tightly coupled to the PWM module, reducing external components in power-factor-correction (PFC) and DC-DC stages.
Typical applications include AC-DC and DC-DC switch-mode power supplies, interleaved power factor correction (as shown in Microchip's reference design for this family), LED drivers, battery chargers, and digital lighting/HID ballast control.
Design tip: budget the control-loop interrupt carefully - at 70 MIPS, a complete current-mode loop with ADC read, PI compensation and PWM duty update can fit well under a few microseconds, but flash wait-state and interrupt latency settings must be validated on real hardware.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design guidance not found on the manufacturer product page alone.
Drop-in alternatives for DSPIC33EP32GS202-I/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 DSPIC33EP32GS202-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Product Family, Operating Temperature, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP16GS202-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.25 / Unit
View Datasheet →DSPIC33EP32GP502T-E/SO
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33EP32GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.65 / Unit
View Datasheet →DSPIC33EP32GS202-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC (CMOS) |
| Max CPU Speed | 70 MIPS |
| Core Clock | 60 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Supply Voltage (Nominal) | 3.3 V |
| Supply Voltage Range | 2.5 V to 3.6 V |
| Operating Temperature | -40C to +85C |
| Package | 28-SOIC, 1.27 mm lead pitch |
| Mounting Type | Surface Mount |
| Product Family | dsPIC33EP32GS202 (Digital Power / SMPS) |
| Lifecycle Status | In Production (per Microchip product page) |
| Target Applications | Digital Power, SMPS, High-Speed ADC/DAC control |
| Functional Safety Support | FuSa-classified per DigiKey listing |
DSPIC33EP32GS202-I/SO 28-soic, 1.27 mm lead pitch Pin Configuration Guide
Pin configuration for DSPIC33EP32GS202-I/SO (28-soic, 1.27 mm lead pitch 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 DSPIC33EP32GS202-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS202-I/SO is suitable for 6 applications: Switch-Mode Power Supplies (SMPS), Power Factor Correction (PFC), LED Drivers and Digital Lighting, Battery Chargers, Motor Control and Drive Power, Embedded Industrial Control with DSP Signal Processing.
Switch-Mode Power Supplies (SMPS)
The DSPIC33EP32GS202-I/SO is purpose-built for digital SMPS control: its 70 MIPS 16-bit DSP core with multiply-accumulate instructions executes current-mode PI compensation loops in a few microseconds, while the GS-family high-speed ADC and comparators sample switch currents without external analog compensation networks. In a typical AC-DC flyback or DC-DC buck converter, the controller reads the current sense comparator output, computes the duty correction, and updates the dedicated PWM module each switching cycle. The digital approach enables adaptive dead-time, non-linear gain scheduling and field firmware updates that analog controllers cannot offer. The main trade-off versus a dedicated analog PWM IC is firmware development effort and the need to budget deterministic interrupt latency within the loop bandwidth.
Recommended
Power Factor Correction (PFC)
Interleaved power factor correction is the flagship reference application for the dsPIC33EP GS family - Microchip publishes an interleaved PFC reference design that evaluates the power and features of these SMPS DSCs. The DSPIC33EP32GS202-I/SO performs average-current-mode PFC control: the ADC samples the rectified input voltage and inductor current, the 70 MIPS core executes the multiplier for current reference shaping and the compensation loop, and the dedicated PWM drives the PFC switch with cycle-by-cycle current limiting via the analog comparators. Running the shaping and compensation digitally achieves power factors above 0.99 across load ranges and allows firmware-tuned THD optimization. Interleaved two-phase designs benefit from the PWM module's phase-shifted channel capability.
Recommended
LED Drivers and Digital Lighting
Digitally controlled LED drivers use the DSPIC33EP32GS202-I/SO to combine constant-current regulation with dimming intelligence. The GS-family fast ADC samples output current for closed-loop regulation at 70 MIPS, while the PWM module generates both the power-conversion switching and high-resolution dimming waveforms; the digital core additionally implements DALI/DMX-style protocols, thermal fold-back and color-mixing state machines on the same die. Compared with a fixed analog LED driver IC, this DSC removes external compensation components, supports programmable dimming curves, and enables protection features such as open-circuit detection through the comparators. The 28-SOIC industrial -40C to +85C rating suits luminaires and signage power stages operating in elevated ambient temperatures.
Recommended
Battery Chargers
Smart battery chargers require simultaneous fast power-stage control and battery-management state logic, which the DSPIC33EP32GS202-I/SO delivers on one chip. The 70 MIPS DSP core closes the CC/CV charging loop using the high-speed ADC and comparators for cycle-by-cycle current limiting, while spare core bandwidth runs charge-termination algorithms, temperature-based derating, and communication with a host or fuel gauge. Digital control enables programmable charge profiles per battery chemistry (Li-ion, lead-acid, NiMH) with firmware updates rather than hardware changes, and adaptive algorithms that extend battery life. The 3.3V logic domain, industrial temperature rating and 28-SOIC footprint make it practical for compact charger power boards from 10W to multi-hundred-watt designs.
Recommended
Motor Control and Drive Power
Although the GS family is aimed at power conversion, the DSPIC33EP32GS202-I/SO also serves compact motor-drive applications such as BLDC/PMSM fans, pumps and small appliances. The 16-bit DSP core executes field-oriented or sensorless trapezoidal control at 70 MIPS with hardware multiply-accumulate for Park/Clarke transforms, the fast ADC samples phase currents, and the dedicated PWM produces the complementary drive signals with dead time. Running control and light housekeeping (UART diagnostics, protection state machines) on one die reduces BOM cost versus MCU-plus-gate-driver-controller splits. For larger three-phase industrial drives requiring more PWM channels and I/O, step up to the higher-pin-count GS504/GS506 family members with the same core and software ecosystem.
Recommended
Embedded Industrial Control with DSP Signal Processing
Beyond pure power conversion, the DSPIC33EP32GS202-I/SO fits general industrial embedded nodes that need DSP throughput: sensor signal conditioning, digital filtering of noisy analog inputs, and deterministic control outputs. The 16-bit core's DSP instructions and barrel shifter accelerate FIR/IIR filters and FFT-based analysis, while 32KB Flash holds the application plus a modest communication stack over UART/SPI/I2C via the remappable peripheral pins. The industrial -40C to +85C CMOS device and 3.3V supply integrate cleanly into 24V industrial systems through simple level shifting. Compared with pairing a generic MCU and an external DSP, this single-chip approach cuts BOM count, board area and firmware complexity, at the cost of a smaller software ecosystem than 32-bit MCU alternatives.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS202-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP16GS202-I/SO | DSPIC33EP32GP502T-E/SO | DSPIC33EP32GP502-I/SO |
|---|---|---|---|---|
| Package | 28-SOIC (1.27 mm pitch) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Speed | 16-bit dsPIC33EP, 70 MIPS (60 MHz) | 16-bit dsPIC33EP, 70 MIPS | 16-bit dsPIC33EP, 70 MIPS | 16-bit dsPIC33EP, 70 MIPS |
| Flash Memory | 32 KB | 16 KB (-50%) | 32 KB | 32 KB |
| Peripheral Family | GS (digital power: SMPS ADC/comparators/PWM) | GS (digital power) - same set | GP (general purpose) | GP (general purpose) |
| Supply Voltage | 3.3 V nominal (2.5 V - 3.6 V) | 3.3 V nominal | 3.3 V nominal | 3.3 V nominal |
| Best Fit Application | SMPS, PFC, digital power | Cost-reduced digital power | General-purpose / high-temp control | General-purpose embedded control |
Key Differentiators
- Double the program memory of the entry GS part (vs DSPIC33EP16GS202-I/SO)
- Digital-power-optimized analog fabric (vs DSPIC33EP32GP502-I/SO)
- Extended-temperature option within same footprint (vs DSPIC33EP32GP502T-E/SO)
Design Notes
Power the dsPIC33EP32GS202 from a clean 3.3V rail within the 2.5V-3.6V range, and keep AVDD (analog supply) separately decoupled from digital VDD with an RC or ferrite filter - GS-family high-speed ADC accuracy depends directly on analog rail noise. Place 100 nF ceramic decoupling at every supply pin pair plus bulk capacitance near the regulator. In SMPS applications, route the controller's ground reference as a quiet analog ground island star-connected to the power ground at a single point to prevent switching-current injection into ADC readings.
On the 28-SOIC 1.27 mm footprint, prioritize short traces for the PWM outputs to the gate drivers and kelvin-routing for current-sense signals to the comparator/ADC inputs. Keep the RC oscillator or crystal traces short and guarded. Because many pins are remappable (RP) and multiplexed with GS analog functions, verify the final pin assignment against the datasheet pinout tables before layout freeze - moving an analog function after routing may force a respin. Provide probe points on MCLR, PGD/PGC programming pins for in-circuit debug with MPLAB X tools.
Three recurring pitfalls with this family: (1) substituting GP-family parts (e.g., DSPIC33EP32GP502) for the GS202 without auditing the digital-power peripherals - comparator and PWM register maps differ; (2) relying on the 'GS202' family number alone and ignoring the package/temp ordering suffix (I/SO vs SS vs E-grades) when ordering; (3) exceeding 70 MIPS timing assumptions in the control-loop interrupt - measure worst-case ISR execution with the debugger cycle counter, including flash wait states, before fixing the switching frequency. Always verify the latest datasheet revision on the Microchip product page.
Compliance Information
Compliance data was not present in the retrieved web data; consult the Microchip product page or the datasheet environmental section for confirmed RoHS/REACH status. The part is a commercial/industrial-temperature (-40C to +85C) device, not AEC-Q100 automotive-qualified.
