DSPIC33EP32GS202-E/SO - 16-bit DSC, 32KB Flash | Microchip
MPN: DSPIC33EP32GS202-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.32 | $4.32 |
| 10 | $3.89 | $38.90 |
| 100 | $3.42 | $342.00 |
| 500 | $3.08 | $1,540.00 |
| 1,000 | $2.76 | $2,760.00 |
DSPIC33EP32GS202-E/SO Overview
A digital signal controller combines the computational throughput of a DSP core with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy of embedded silicon, the dsPIC33EP family sits at the top of the 16-bit controller range, purpose-built for switch-mode power supply (SMPS) and digital power conversion control loops that generic MCUs cannot close fast enough.
Key features include a 16-bit dsPIC33EP core executing up to 60 MIPS (Microchip also markets this family as a 70 MIPS-class device for power applications), 32KB of self-programmable Flash, on-chip high-speed ADC and DAC peripherals, and Functional Safety (FuSa) support as noted by DigiKey. The GS202 variant adds dedicated digital-power peripherals that offload PWM and feedback tasks from software.
Architecturally, the device pairs an enhanced 16-bit CPU with zero-overhead DSP multiply-accumulate instructions, hardware loop support, and deterministic interrupt latency - characteristics essential for time-critical current-mode control in converters. The E-suffix temperature grade and AEC-Q100 qualification extend reliability beyond standard industrial parts.
Typical applications include AC-DC and DC-DC SMPS control, power factor correction (PFC), battery chargers, digital lighting ballasts, and automotive auxiliary power systems.
When designing with this part, budget the VCAP pin regulator capacitor correctly and verify the ADC sampling timing against the PWM period for stable control-loop behavior.
This page synthesizes distributor pricing, drop-in family alternatives, design notes, and FAQs not found together on the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GS202-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 DSPIC33EP32GS202-E/SO (same form factor and footprint) — differing in Package, Operating Temperature, Supply Voltage, Application Focus, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS202-I/SO
✅ Drop-In✓ In Stock
$2.9 / Unit
View Datasheet →DSPIC33EP64GS202-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP16GS202-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GP502-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.26 / Unit
View Datasheet →DSPIC33EP32GS202-E/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC 33EP, 16-bit |
| Core Speed | 60 MIPS |
| Program Memory Size | 32KB (32K x 8) Flash |
| Supply Voltage | 3.3 V |
| Package | 28-SOIC |
| Operating Temperature Range | -40C to +125C (E grade) |
| Qualification | AEC-Q100 (automotive) |
| Product Family | dsPIC33EPXXGS202 (Digital Power / SMPS) |
| Key Peripherals | High Speed ADC, DAC, digital power (SMPS) peripherals |
| Safety Capability | Functional Safety (FuSa) support |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| Data Converters | ADC, DAC |
| Application Focus | Digital power applications |
| Status | In Production |
DSPIC33EP32GS202-E/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset input / programming voltage |
| Pin 2 | AN0/RP0 — Analog input 0 / remappable peripheral pin |
| Pin 3 | AN1/RP1 — Analog input 1 / remappable peripheral pin |
| Pin 4 | AN2/RP2 — Analog input 2 / remappable peripheral pin |
| Pin 5 | AN3/RP3 — Analog input 3 / remappable peripheral pin |
| Pin 6 | PGD/RP4 — In-circuit debug data / remappable peripheral pin |
| Pin 7 | PGC/RP5 — In-circuit debug clock / remappable peripheral pin |
| Pin 8 | OSCI/RP6 — Oscillator crystal input / remappable peripheral pin |
| Pin 9 | OSCO/RP7 — Oscillator crystal output / remappable peripheral pin |
| Pin 10 | VDD — Positive supply (3.3V) |
| Pin 11 | VSS — Ground reference |
| Pin 12 | SDA1/RP8 — I2C data / remappable peripheral pin |
| Pin 13 | SCL1/RP9 — I2C clock / remappable peripheral pin |
| Pin 14 | VDD — Positive supply (3.3V) |
| Pin 15 | VSS — Ground reference |
| Pin 16 | INT0/RP10 — External interrupt 0 / remappable peripheral pin |
| Pin 17 | RP11 — Remappable peripheral pin |
| Pin 18 | RP12 — Remappable peripheral pin |
| Pin 19 | RP13 — Remappable peripheral pin |
| Pin 20 | RP14 — Remappable peripheral pin |
| Pin 21 | RP15 — Remappable peripheral pin |
| Pin 22 | VCAP — Internal regulator capacitor connection |
| Pin 23 | AVDD — Analog supply |
| Pin 24 | AVSS — Analog ground |
| Pin 25 | RP17 — Remappable peripheral pin |
| Pin 26 | RP18 — Remappable peripheral pin |
| Pin 27 | RP19 — Remappable peripheral pin |
| Pin 28 | RP20 — Remappable peripheral pin |
Typical Applications
DSPIC33EP32GS202-E/SO is suitable for 6 applications: AC-DC SMPS Control, Power Factor Correction (PFC), Battery Chargers, Automotive Auxiliary Power Systems, Digital LED Lighting Drivers, Embedded Industrial Control.
AC-DC SMPS Control
The DSPIC33EP32GS202-E/SO fits flyback, forward, and LLC AC-DC converter control because its dsPIC33EP core executes at up to 60 MIPS and the GS202 variant integrates high-speed ADC and DAC peripherals purpose-built for digital power. The controller samples output voltage and current each switching cycle and updates the PWM duty cycle in a deterministic loop, replacing analog compensation networks with firmware that can adapt across load ranges. According to Microchip, the GS202 family is explicitly targeted at Digital Power SMPS applications. Place the ADC sampling trigger aligned to the PWM period midpoint to avoid switching-edge noise; the 32KB Flash holds control code plus protection and communication routines. The 3.3V supply simplifies interfacing with feedback dividers and isolation circuitry in compact power-supply designs.
Recommended
Power Factor Correction (PFC)
Interleaved and single-phase PFC stages benefit directly from this controller: Microchip provides a reference design for Interleaved Power Factor Correction based on the SMPS dsPIC Digital Signal Controller family, demonstrating the intended use of the GS202 in this role. The 60 MIPS core executes average-current-mode control loops with sufficient headroom, while the high-speed ADC captures inductor current and bus voltage with cycle-by-cycle resolution. The DSP multiply-accumulate capability accelerates RMS calculations required for power-factor computation. In an E-grade AEC-Q100 package rated to +125C, the part tolerates the elevated ambient temperatures typical of power-supply enclosures. Firmware-implemented PFC also enables adaptive schemes such as burst mode at light load, improving efficiency compliance without additional analog components.
Recommended
Battery Chargers
Smart battery chargers for lead-acid, Li-ion, and automotive battery systems use the DSPIC33EP32GS202-E/SO to implement CC/CV charging profiles, temperature-compensated thresholds, and fault handling in firmware. The AEC-Q100 qualification and -40C to +125C operating range make the E-grade part appropriate for chargers installed in vehicles or outdoor equipment, where industrial-grade controllers would exceed their ratings. The high-speed ADC monitors battery current and voltage with the precision needed for termination decisions, and the DAC supports programmable reference or threshold generation. The 32KB Flash accommodates multiple chemistry profiles, CAN or UART communication for charger-to-host dialogue, and data logging. Deterministic PWM output drives the power stage through a gate driver with cycle-by-cycle current limiting.
Recommended
Automotive Auxiliary Power Systems
Because the -E/SO suffix denotes AEC-Q100 qualification and the extended -40C to +125C temperature range, this DSC targets automotive auxiliary power converters - USB charging modules, LED headlamp drivers, and 12V/48V DC-DC auxiliaries - where standard industrial parts are excluded by specification. The Functional Safety (FuSa) capability noted by DigiKey supports automotive programs requiring diagnostic self-test coverage of the controller. The digital-power peripherals close voltage and current loops at the switching frequency of typical automotive converters, while the 16-bit DSP core runs supervisory logic such as reverse-polarity protection, load-dump response, and fault reporting. The 28-SOIC package supports conformal-coated, vibration-tolerant assembly with proven through-hole-optional SOIC reliability in automotive manufacturing.
Recommended
Digital LED Lighting Drivers
LED drivers - from industrial luminaires to automotive lamps - use the DSPIC33EP32GS202-E/SO to implement constant-current regulation, dimming (PWM and analog), and string protection digitally. The high-speed ADC samples LED string current each PWM cycle, enabling accurate current matching across multiple strings, while firmware control allows smooth dimming curves, thermal foldback based on measured temperature, and open/short-circuit fault detection that analog controllers handle poorly. The 60 MIPS core leaves margin for communication interfaces such as DALI or UART-based dimming protocols within the same 32KB Flash image. With AEC-Q100 qualification in the E-grade part, luminaire designs serving outdoor or automotive lighting environments can standardize on a single controller across product tiers, simplifying certification and firmware maintenance.
Recommended
Embedded Industrial Control
Beyond power conversion, the DSPIC33EP32GS202-E/SO serves general embedded control in industrial equipment that needs both DSP-grade math and real-time I/O: sensor signal conditioning, motor-adjacent supervisory logic, and data acquisition front-ends. The high-speed ADC converts analog sensor inputs with cycle-accurate timing, the DSP core executes filtering (IIR/FIR) on the sampled data, and remappable RP pins let designers route UART, SPI, or I2C peripherals to whichever SOIC-28 pins suit the PCB routing. The extended -40C to +125C E-grade range covers unconditioned factory floors and outdoor enclosures, and the FuSa capability supports machinery requiring functional-safety documentation. Microchip's MPLAB X and XC16 toolchain, plus the dsPIC33 Family Reference Manual, provide a mature, well-documented development path.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS202-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS202-I/SO | DSPIC33EP64GS202-E/SO | DSPIC33EP16GS202-E/SO | DSPIC33EP32GP502-E/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | 16-bit dsPIC33EP, 60 MIPS | 16-bit, 60 MIPS | 16-bit, 60 MIPS | 16-bit, 60 MIPS | 16-bit, 60 MIPS |
| Flash Memory | 32KB (32K x 8) | 32KB | 64KB | 16KB | 32KB |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) |
| AEC-Q100 | Qualified | Not qualified | Qualified (E grade) | Qualified (E grade) | Qualified (E grade) |
| Digital Power Peripherals (High-Speed ADC/DAC) | Yes (GS202) | Yes (GS202) | Yes (GS202) | Yes (GS202) | No (GP peripheral set) |
| Primary Application | Digital power / SMPS | Digital power / SMPS (industrial) | Digital power with larger code space | Cost-reduced digital power | General-purpose control |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- AEC-Q100 automotive qualification with -40C to +125C range (vs DSPIC33EP32GS202-I/SO)
- Dedicated digital-power peripheral set (vs DSPIC33EP32GP502-E/SO)
- Cost-optimized 32KB Flash point in the GS202 family (vs DSPIC33EP64GS202-E/SO)
Design Notes
The dsPIC33EP family includes an internal 2.5V regulator fed from the 3.3V supply through the VCAP pin (pin 22 in the 28-SOIC). Fit a low-ESR ceramic capacitor (typically around 10uF per the family data sheet recommendations) directly at VCAP with a short return to VSS; an incorrect or missing VCAP capacitor is the most common cause of unstable operation or failure to start on this family. Separate AVDD/AVSS from digital VDD/VSS with an RC or ferrite filter to protect ADC accuracy in power-conversion control loops.
For SMPS applications, route the high-speed ADC input traces away from PWM switching nodes and keep the analog ground plane quiet. Use the peripheral pin select (RP) remapping to position PWM outputs and communication pins optimally for the PCB layout rather than forcing the layout around fixed pins. Decouple each VDD pin with 0.1uF ceramics placed within a few millimeters of the pin, and keep the MCLR trace short with its pull-up resistor close to pin 1 to preserve in-circuit debugging reliability.
Verify ADC sampling timing against the PWM period: triggering the sample converter during a switching edge injects noise into the control loop and causes duty-cycle jitter. Align the ADC trigger point to the PWM counter match value as recommended in the dsPIC33EPXXGS202 Family Data Sheet (DS70005208E). Also confirm the temperature suffix on incoming stock - the -I/SO industrial part is not a valid substitute in AEC-Q100 automotive builds even though the footprint is identical.
Compliance Information
AEC-Q100 qualification and extended temperature grade confirmed from datasheets.com part description ('automotive aec-q100 28-pin SOIC'). RoHS/REACH/lead-free status not explicitly stated in the verified web data; confirm via Microchip Material Declaration documentation.
