DSPIC33EP32GS502T-I/SO - 16-bit 70 MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33EP32GS502T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.18 | $41.80 |
| 100 | $3.71 | $371.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $3.02 | $3,020.00 |
DSPIC33EP32GS502T-I/SO Overview
A Digital Signal Controller combines the control peripherals of a microcontroller with the multiply-accumulate (MAC) DSP engine of a digital signal processor. In the power-conversion hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it runs the closed-loop control algorithms (PFC, LLC, buck, boost) that would otherwise require discrete analog controllers, while retaining flexible GPIO and communication peripherals. The dsPIC33EP GS family is Microchip's SMPS-focused DSC line for digital power applications.
Key features include the 70 MIPS 16-bit core with DSP instruction support, high-resolution PWM suitable for switching power supplies, and the GS-family analog block targeted at power conversion. According to Microchip product data, the part is also designated for Functional Safety (FuSa) development support, an important differentiator for industrial and appliance designs requiring documented development flows.
Technically, the dsPIC33EP core executes most instructions in a single cycle, with two 40-bit accumulators and hardware division support for control-law computation. The GS (SMPS) variants add high-resolution PWM peripherals and fast analog comparators intended for peak current-mode and voltage-mode digital power topologies, and the family is documented in the dsPIC33EPXXGS50X Family Data Sheet (DS70005127) available from Microchip.
Typical applications include interleaved power factor correction (Microchip's 350 W Interleaved PFC reference design targets this device family), digital AC-DC and DC-DC converters, battery chargers, and embedded control in industrial power supplies.
When designing with this device, budget Flash carefully at 32 KB and verify that the 28-pin package provides enough PWM and analog channels for the target topology; pin-limited designs may need to move to the 44-pin GS504 variants. Always use Microchip's reference designs as a starting point for digital power layouts.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-25.
Drop-in alternatives for DSPIC33EP32GS502T-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 DSPIC33EP32GS502T-I/SO (same form factor and footprint) — differing in Package, Operating Temperature, Packaging, Core Architecture, Functional Safety Support.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP64GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32GS502T-E/SO
✅ Drop-In✓ In Stock
$3.4 / Unit
View Datasheet →DSPIC33EP32GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/SO
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33EP32GS502T-I/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC 33EP, 16-bit |
| Maximum CPU Speed | 70 MIPS |
| Program Memory Size | 32KB (32K x 8) Flash |
| Product Family | dsPIC33EPXXGS50X (GS / SMPS DSC) |
| Functional Safety Support | Yes (FuSa) |
| Package | 28-SOIC |
| Mounting Type | Surface Mount |
| Packaging Suffix | T = Tape & Reel |
| Temperature Grade | I (Industrial) |
| RoHS Status | RoHS compliant (per distributor listing) |
DSPIC33EP32GS502T-I/SO 28-soic Pin Configuration Guide
Pin configuration for DSPIC33EP32GS502T-I/SO (28-soic 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 DSPIC33EP32GS502T-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS502T-I/SO is suitable for 6 applications: Interleaved Power Factor Correction, Digital AC-DC Power Supplies, Battery Chargers, Industrial Motor Control, Solar Micro-Inverters and DC-DC Converters, Embedded Industrial Control Nodes.
Interleaved Power Factor Correction
The DSPIC33EP32GS502T-I/SO fits interleaved PFC designs directly: Microchip's own Interleaved PFC reference design for the SMPS dsPIC DSC family targets this device class, operating from universal AC input and delivering a single high-voltage DC output up to 350W. The GS-series high-resolution PWM generates two phase-shifted switching channels, while the fast analog comparators support cycle-by-cycle peak current limiting in each phase. Firmware on the 70 MIPS core runs average current-mode control mathematics with adequate cycle margin. Placing the controller adjacent to the switching stage with short gate-drive traces and using the reference design's compensation values yields power factors above 0.99 in typical universal-input designs, meeting harmonic requirements for front-end industrial power supplies.
Recommended
Digital AC-DC Power Supplies
In digitally controlled AC-DC converters, the DSPIC33EP32GS502T-I/SO replaces analog control chips with a programmable solution: the 70 MIPS 16-bit core executes voltage-mode or current-mode loop compensation in software, and the GS-series PWM block provides the resolution needed for tight output regulation at common switching frequencies. The 32KB Flash accommodates startup sequencing, protection state machines (overvoltage, overcurrent, overtemperature), and housekeeping tasks alongside the control loop. Because control parameters are firmware, one PCB supports multiple output voltage SKUs. The trade-off versus analog control is firmware development effort and loop-tuning skill; Microchip's digital power reference designs and the FuSa designation mitigate both, particularly for industrial supplies requiring documented development processes.
Recommended
Battery Chargers
Battery charging profiles - CC/CV transition, temperature-monitored taper, and termination - map naturally onto the DSPIC33EP32GS502T-I/SO. The high-resolution PWM regulates charge current precisely through the power stage, while the on-chip ADC (see data sheet DS70005127 for channel assignments on the 28-SOIC pinout) samples battery voltage, current, and thermistor inputs for the charging state machine stored in 32KB Flash. The 70 MIPS DSP core leaves headroom for coulomb-counting and communication with a host over UART or I2C. Using a programmable DSC instead of fixed-function charger ICs lets one hardware platform serve different battery chemistries (Li-ion, lead-acid, LiFePO4) via firmware, which reduces inventory for multi-product industrial charger manufacturers.
Recommended
Industrial Motor Control
For small motor drives such as BLDC fans, pumps, and fractional-horsepower industrial drives, the DSPIC33EP32GS502T-I/SO provides the complementary PWM outputs and fast comparators needed for six-step and sensorless field-oriented control within its 28-pin budget. The 70 MIPS core with DSP multiply-accumulate executes Clarke/Park transforms and PI current loops at typical PWM frequencies with cycle margin. The industrial (I) temperature grade suits factory floor environments, and FuSa development support helps with machinery applications that require documented development. At 32KB Flash, firmware should keep the control loop and protection logic lean; sensorless algorithms with extensive tables may need the 64KB GS502 variant, which is pin-compatible and requires no layout change.
Recommended
Solar Micro-Inverters and DC-DC Converters
Solar micro-inverter and isolated DC-DC converter designs use the DSPIC33EP32GS502T-I/SO for phase-shifted full-bridge and resonant topology control. The GS-series PWM block supports the phase-shift and frequency modulation these topologies require, and fast on-chip comparators implement cycle-by-cycle overcurrent protection independent of the CPU, meeting robustness expectations for always-on energy conversion hardware. The 70 MIPS core manages maximum-power-point-tracking arithmetic on the panel side. The 28-SOIC footprint suits compact, board-mounted converter assemblies, though designers should verify PWM channel count against the data sheet pinout before committing to the 28-pin package, since 44-pin GS504 variants offer more channels when topologies need additional switching legs.
Recommended
Embedded Industrial Control Nodes
Beyond pure power conversion, the DSPIC33EP32GS502T-I/SO serves as a 16-bit embedded control node in industrial equipment: the 70 MIPS core handles deterministic control loops, 32KB Flash stores application logic, and the dsPIC33EP peripheral set provides UART, SPI, and I2C for fieldbus-adjacent communication (confirm exact interface counts in data sheet DS70005127). The Functional Safety (FuSa) designation supports equipment programs that must document their microcontroller selection and development process. Compared with a general-purpose PIC16, the DSC adds DSP throughput for sensor filtering and control math; compared with a full MCU+DSP two-chip solution, it consolidates the design into one 28-SOIC device, cutting BOM cost and board area.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS502T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP64GS502-I/SO | DSPIC33EP32GS502T-E/SO | DSPIC33EP32GS502-I/SO | DSPIC33EP32GP502T-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 |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 32KB (32K x 8) | 64KB | 32KB | 32KB | 32KB |
| Subfamily / Peripherals | GS (SMPS: high-res PWM, fast comparators) | GS (SMPS) - same | GS (SMPS) - same | GS (SMPS) - same | GP (general-purpose) |
| Temperature Grade | I (Industrial) | I (Industrial) | E (Extended) | I (Industrial) | E (Extended) |
Key Differentiators
- GS-series SMPS peripheral set (high-resolution PWM, fast comparators) (vs DSPIC33EP32GP502T-E/SO)
- Same-footprint Flash growth path (vs DSPIC33EP64GS502-I/SO)
- Functional Safety (FuSa) device designation (vs DSPIC33EP32GS502T-E/SO)
- Trade-off: industrial (I) versus extended (E) temperature ceiling (vs DSPIC33EP32GS502T-E/SO)
Design Notes
Decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin, plus a 4.7 uF to 10 uF bulk capacitor near the controller. In digital power layouts the DSC shares a board with a high-di/dt switching stage, so isolate the controller's supply with an RC or ferrite filter from the power-stage rail to prevent PWM glitches from supply bounce. Estimated: a 70 MIPS core drawing tens of mA imposes only a small DC load - the filter design is driven by switching-noise rejection, not current capacity.
Route high-resolution PWM outputs to gate drivers as short, guarded traces away from ADC sense lines; the GS-series comparators are fast enough that ground bounce on shared return paths can cause false cycle-by-cycle trips. Follow Microchip's Interleaved PFC reference design layout guidance: star-ground the controller, keep analog sense routing Kelvin-connected to shunts, and place the MCLR programming header so ICSP tools reach the board after assembly. Use the exposed SOIC width for wider traces on VDD/VSS than signal pins to lower inductance.
Three frequent mistakes with this part: (1) underestimating 32KB Flash - digital power firmware with protection state machines, comms, and compensation tables can exceed it late in the project; if in doubt, qualify the pin-compatible 64KB DSPIC33EP64GS502 now so the swap later is a reorder, not a redesign. (2) Assuming GP502 is interchangeable in firmware - the GP subfamily lacks GS power peripherals, so PWM/comparator code will not port. (3) Designing to the I-grade without checking ambient rise inside sealed enclosures; select the E-grade variant instead.
Compliance Information
RoHS compliance and lead-free status per distributor listings (DigiKey, PCBElectronics). REACH, halogen-free, and conflict-minerals declarations not found in provided data - request official Microchip compliance package.
