DSPIC33EP32GS502-E/2N - 32KB Flash, 70MIPS DSC | Microchip
MPN: DSPIC33EP32GS502-E/2N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.38 | $4.38 |
| 10 | $4.16 | $41.60 |
| 100 | $3.94 | $394.00 |
| 500 | $3.72 | $1,860.00 |
| 1,000 | $3.5 | $3,500.00 |
DSPIC33EP32GS502-E/2N Overview
A Digital Signal Controller combines the computational architecture of a digital signal processor with the peripheral integration and control features of a microcontroller. Within the power-management hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it executes single-cycle MAC/DSP instructions for real-time control loops while integrating ADCs, PWM peripherals, and communications blocks on one die. This makes the dsPIC33 family the de-facto building block for digitally controlled switch-mode power supplies.
The GS variant is specifically optimized for digital power: it integrates a high-speed 12-bit ADC with multiple sample-and-hold circuits able to sample at up to 4 Msps, dedicated PWM peripherals with advanced modes (complementary outputs, dead-time insertion, fault protection), and an on-chip DAC for comparator-based current-limiting loops. These peripherals offload time-critical tasks from the CPU, enabling nested fast control loops at switching frequencies of hundreds of kHz.
Architecturally, the dsPIC33EP core executes 16-bit RISC instructions with DSP extensions (40-bit accumulator, modulo and bit-reversed addressing) at 70 MIPS from a single 3.0V to 3.6V supply. The 32KB Flash supports self-programming, and RAM and interrupt latency figures suit deterministic control loops.
Typical applications include AC-DC and DC-DC power supplies, power factor correction stages, LED drivers, solar micro-inverters, and battery chargers - anywhere high-frequency closed-loop control demands fast ADC sampling and precision PWM.
Design consideration: the exposed pad of the UQFN package must be soldered to a ground plane for both thermal dissipation and electrical performance; do not leave it unconnected.
This page consolidates distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, with prices as of 2026-09-25.
Drop-in alternatives for DSPIC33EP32GS502-E/2N — 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 DSPIC33EP32GS502-E/2N (same form factor and footprint) — differing in Package, Operating Temperature, ADC, PWM, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS502-I/2N
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.19 / Unit
View Datasheet →DSPIC33EP16GS502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/MM
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33EP32GS502-E/2N Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC (RISC with DSP extensions) |
| Maximum CPU Speed | 70 MIPS |
| Flash Program Memory | 32 KB |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +125C (E grade) |
| Package | 28-UQFN (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Application Focus | Digital Power SMPS |
| ADC | High-speed 12-bit ADC, optimized for digital power |
| DAC | On-chip DAC for reference/comparator loops |
| PWM | Digital power optimized PWM peripherals |
| Pin Count | 28 |
| Product Status | In Production |
| Packaging | Tube (per package suffix /2N) |
DSPIC33EP32GS502-E/2N 28-uqfn (6x6 mm) with exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP32GS502-E/2N (28-uqfn (6x6 mm) with exposed pad 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 DSPIC33EP32GS502-E/2N.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS502-E/2N is suitable for 6 applications: Digital SMPS Power Supplies, Power Factor Correction (PFC), LED Drivers, Solar Micro-Inverters, Battery Chargers, Industrial Motor Control and Automation.
Digital SMPS Power Supplies
The DSPIC33EP32GS502-E/2N is purpose-built for digitally controlled switch-mode power supplies: its high-speed 12-bit ADC with multiple sample-and-hold inputs samples inductor current and output voltage at microsecond rates, while digital-power PWM peripherals handle complementary outputs with hardware dead-time insertion. Placed as the sole control IC in an AC-DC or DC-DC converter, the 70 MIPS core executes nested current and voltage loops in C without assembly. The -40C to +125C E-grade rating suits industrial and telecom power supplies operating in sealed enclosures, and the on-chip DAC supports comparator-based cycle-by-cycle current limiting.
Recommended
Power Factor Correction (PFC)
Microchip explicitly provides reference designs for interleaved power factor correction based on this SMPS dsPIC DSC family. The high-speed ADC captures instantaneous AC line voltage and input current each switching cycle, and the 70 MIPS DSP core computes the multiplier function digitally, achieving power factors above 0.99 without analog multiplier ICs. The GS502's hardware-supported PWM with fault protection safely disables the boost stage during line transients. The extended -40C to +125C temperature range tolerates the hot environment near bridge rectifiers and PFC inductors typical of industrial power supplies and EV onboard chargers.
Recommended
LED Drivers
High-power LED lighting demands constant-current regulation with fast transient response, which the DSPIC33EP32GS502-E/2N delivers through its digital-power PWM and high-speed ADC loop. Dimming schemes including PWM dimming, analog dimming via the on-chip DAC, and hybrid approaches are implemented in firmware without extra components. The 70 MIPS core can simultaneously manage buck converter control, dimming curves, temperature derating via the ADC channels, and DALI or DMX communication stacks within the 32KB Flash. The extended temperature grade accommodates enclosed luminaires where ambient temperatures routinely reach 85C to 105C near the driver PCB.
Recommended
Solar Micro-Inverters
Micro-inverters require simultaneous MPPT (maximum power point tracking), grid-synchronized current injection, and safety monitoring - three concurrent real-time tasks well matched to the DSPIC33EP32GS502-E/2N. The 70 MIPS core runs the MPPT algorithm while hardware PWM generates the high-frequency stage switching, and the fast ADC samples panel voltage, grid voltage, and current every cycle. The 32KB Flash holds the control firmware plus grid-compliance routines. The -40C to +125C rating covers rooftop junction box temperatures, and the UQFN exposed pad ties directly to the power ground plane for thermal relief in sealed, conformal-coated outdoor designs.
Recommended
Battery Chargers
Multi-chemistry battery chargers use the DSPIC33EP32GS502-E/2N to implement CC/CV charge profiles, termination detection, and fault protection entirely in firmware. The high-speed 12-bit ADC monitors battery voltage, charge current, and pack temperature through NTC inputs each control cycle, while digital-power PWM drives the synchronous buck power stage with hardware dead-time for high efficiency. The on-chip DAC sets precise comparator thresholds for hardware over-current protection independent of the CPU. The -40C to +125C E-grade rating suits automotive and industrial charging stations, and 3.3V operation simplifies interfacing with system communication transceivers.
Recommended
Industrial Motor Control and Automation
Beyond pure power conversion, the DSPIC33EP32GS502-E/2N serves brushless DC and permanent-magnet motor drives up to several hundred watts. The 70 MIPS DSP core with single-cycle MAC executes field-oriented control (FOC) transforms at high loop rates, the high-speed ADC samples phase currents with minimal latency, and PWM peripherals generate complementary six-step or sinusoidal drive with dead-time insertion. Quadrature encoder or hall-sensor interfaces occupy dedicated I/O on the 28-pin package. The extended -40C to +125C temperature range and the UQFN exposed pad soldered to a ground plane allow dense integration into drives mounted inside industrial machinery enclosures.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS502-E/2N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS502-I/2N | DSPIC33EP16GS502-I/2N | DSPIC33EP64GS502-I/2N | DSPIC33EP32GP502T-E/MM |
|---|---|---|---|---|---|
| Package | 28-UQFN (6x6 mm) EP | 28-UQFN (6x6 mm) EP - same | 28-UQFN (6x6 mm) EP - same | 28-UQFN (6x6 mm) EP - same | 28-QFN (6x6 mm) EP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| Digital-Power ADC/DAC | Yes (GS high-speed ADC + DAC) | Yes | Yes | Yes | No (GP family, standard ADC) |
| Application Optimization | Digital Power SMPS | Digital Power SMPS | Digital Power SMPS | Digital Power SMPS | General-purpose control |
Key Differentiators
- Extended +125C temperature rating (vs DSPIC33EP32GS502-I/2N)
- Twice the code space of the entry GS part (vs DSPIC33EP16GS502-I/2N)
- Digital-power-optimized ADC and DAC peripherals (vs DSPIC33EP32GP502T-E/MM)
Design Notes
The UQFN (6x6 mm) exposed pad on the DSPIC33EP32GS502-E/2N is the primary ground and thermal connection. Create a solder-mask-defined landing pattern with an array of thermal vias (typically 4-6 vias of 0.3 mm diameter) connecting the pad to the internal ground plane. Insufficient exposed-pad soldering is the most common cause of field failures with UQFN DSCs - it causes both thermal issues and intermittent ground returns during high-current PWM switching.
Decouple each VDD pin with 100 nF ceramic capacitors placed within 2 mm of the pin, plus one bulk 4.7 uF to 10 uF capacitor per supply domain. In SMPS applications, separate AVDD with an RC or ferrite filter from the noisy digital VDD rail to preserve high-speed ADC accuracy; ADC reference noise directly degrades current-loop regulation. Keep the analog ground return isolated from the power-stage ground until a single-point star connection.
MCLR must be pulled up with a 10k resistor and is used as the programming/debugging pin with ICSP tools - leave a 5-pin header (MCLR, VDD, GND, PGD, PGC) on production boards for field firmware updates. Also confirm temperature grade before BOM substitution: the -E grade (+125C) part may be swapped with an -I grade (+85C) part by distributors during shortages, which fails in hot power-supply enclosures.
Route the ADC current-sense inputs as short differential pairs away from PWM gate-drive traces, and use a dedicated sense resistor kelvin connection. Keep the crystal/resonator (if used) traces under 10 mm with guard ground. The digital-power PWM outputs should have series gate resistors placed near the DSC to limit ringing, and their return paths must not cross the analog section of the board.
Compliance Information
Lead-free inferred from standard Microchip modern packaging; RoHS/REACH status not stated in provided data - confirm on Microchip product page before ordering.
