DSPIC33EP32GS502-E/MX - 16-bit 70MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33EP32GS502-E/MX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.85 | $5.85 |
| 10 | $5.35 | $53.50 |
| 100 | $4.8 | $480.00 |
| 500 | $4.35 | $2,175.00 |
| 1,000 | $3.95 | $3,950.00 |
DSPIC33EP32GS502-E/MX Overview
A Digital Signal Controller combines the computational architecture of a digital signal processor (DSP) with the peripheral integration and deterministic control of a microcontroller (MCU). In the power-management hierarchy, the dsPIC33EP GS series sits between general-purpose MCUs and dedicated digital power ASICs, providing a programmable, firmware-updatable solution for switch-mode power supplies (SMPS), power factor correction (PFC), and digital lighting control.
Key differentiating features of the GS variant are its interconnected high-speed peripherals: a dedicated high-speed ADC subsystem with programmable gain amplifier (PGA), on-chip comparators, and a high-resolution PWM module designed for closed-loop digital power conversion. The DSP engine with 16 x 16 multiply and 32-bit accumulate operations supports control-loop mathematics at full core speed, while the peripheral interconnect (PTG-style triggering) allows ADC sampling and PWM updates without CPU intervention, minimizing control-loop latency.
Architecturally, the device runs from a 3.3V supply, uses the enhanced dsPIC33E core pipeline for single-cycle MAC execution, and is supported by Microchip's MPLAB X IDE and XC16 compiler, plus the Motor Control and Digital Power development ecosystem, including interleaved PFC reference designs published by Microchip for the SMPS dsPIC family.
Typical applications include digital AC-DC and DC-DC power supplies, active clamp and LLC converters, interleaved power factor correction stages, high-intensity LED lighting drivers, and battery charging systems, where the high-speed ADC-to-PWM loop timing directly determines transient response and efficiency.
For design, budget the ADC sampling rate and PWM resolution together: the GS-series high-speed ADC and PWM can be clocked from a common dedicated time base, and mismatched loop timing is a common pitfall in first-revision SMPS boards. Use the exposed pad of the UQFN package as a low-inductance ground reference.
This page synthesizes distributor stock data, drop-in family alternatives, application guidance, and procurement information not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GS502-E/MX — 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/MX (same form factor and footprint) — differing in ADC, Operating Temperature, PWM, Package, Program Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS502-I/MX
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP64GS502-E/MX
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33EP16GS502-E/MX
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/MM
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33EP32GS502-E/MX Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC with DSP engine |
| Max CPU Speed | 70 MIPS |
| Program Memory | 32KB Flash |
| Supply Voltage | 3.3 V |
| Operating Temperature | -40C to +125C (Extended, E suffix) |
| Package | 28-UQFN (MX), exposed pad |
| Mounting Type | Surface Mount |
| Qualification | Automotive, AEC-Q100 |
| Functional Safety | FuSa (Functional Safety) support per Microchip classification |
| Series | dsPIC33EP 33EP GS (Digital Power SMPS) |
| ADC | High-Speed ADC with PGA (per datasheet) |
| DAC | On-chip DAC (per datasheet) |
| Comparators | On-chip comparators (per datasheet) |
| PWM | High-Speed PWM for digital power (per datasheet) |
| Debug/Programming | ICSP via PGECx/PGEDx pairs (multiple pairs available) |
DSPIC33EP32GS502-E/MX 28-uqfn (mx), exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP32GS502-E/MX (28-uqfn (mx), 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/MX.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS502-E/MX is suitable for 6 applications: Digital Switch-Mode Power Supplies (SMPS), Interleaved Power Factor Correction (PFC), Digital LED Lighting Drivers, Battery Chargers and Battery Management, Industrial Motor Control and Actuation, Automotive Auxiliary Power and Body Electronics.
Digital Switch-Mode Power Supplies (SMPS)
The DSPIC33EP32GS502-E/MX is purpose-built for digitally controlled AC-DC and DC-DC converters. Its high-speed ADC with PGA samples output voltage and inductor current waveforms while the interconnected high-speed PWM drives power MOSFETs with minimal loop latency, enabling voltage-mode, current-mode, or multi-loop control at switching frequencies well above 100 kHz. The 70 MIPS DSP core executes compensation filter math (PID, 2P2Z, 3P3Z) in fixed point with single-cycle MAC operations, keeping control-loop overhead under one switching period. Using this DSC instead of fixed analog controllers allows firmware-tunable loop compensation, adaptive dead-time for efficiency optimization, and PMBus-style telemetry without hardware changes. Place the exposed UQFN pad as star ground for the analog front end to preserve ADC accuracy in noisy converter environments.
Recommended
Interleaved Power Factor Correction (PFC)
Microchip publishes an interleaved PFC reference design for the SMPS dsPIC family, and the DSPIC33EP32GS502-E/MX fits this role directly. Interleaved boost PFC requires two PWM phases with precise phase offset, individual inductor current sensing per phase, and fast average-current-mode control synchronized to the rectified line - all supplied by the GS-series high-speed PWM with phase-shifted outputs and the high-speed ADC with PGA front end. The 32KB Flash holds the PFC state machine, line-frequency feedforward, and phase current balancing logic with room to spare. Compared with a discrete analog PFC controller, this DSC delivers adaptive switching under light load (valley skipping), input-voltage feedforward against grid variation, and digital fault logging for field diagnostics. The -40C to +125C E grade suits telecom rectifier and server PSU ambient profiles.
Recommended
Digital LED Lighting Drivers
High-power LED luminaires benefit from the DSPIC33EP32GS502-E/MX combination of high-resolution PWM and fast analog comparators. The DSC implements buck or boost LED drivers with cycle-by-cycle current limiting handled in hardware by the on-chip comparators, while the CPU manages dimming curves, color mixing, temperature derating, and DALI or PWM-dim input protocols. The 70 MIPS core keeps protocol handling isolated from the fast control loop, and the 32KB Flash accommodates dimming tables plus communications. The extended -40C to +125C temperature range covers enclosed fixture environments where LED driver electronics regularly see 105C ambient near the optical engine. Firmware-based control also enables tunable-white and human-centric lighting features that fixed-frequency analog LED controllers cannot provide without hardware redesign.
Recommended
Battery Chargers and Battery Management
Multi-chemistry battery charging (Li-ion CC/CV, lead-acid three-stage, NiMH delta-V) maps naturally onto the DSPIC33EP32GS502-E/MX. The high-speed ADC with PGA reads pack current via a shunt and cell/module voltages through its analog channels, while the high-speed PWM generates the synchronous buck charging stage. The 70 MIPS DSP core runs coulomb counting, charge-state state machines, and safety supervision (over-voltage, over-current, over-temperature cutoffs using the on-chip comparators for fast hardware faults). The AEC-Q100 qualification and -40C to +125C range make the E/MX grade appropriate for automotive on-board chargers and e-mobility applications. Firmware-based charging also allows field-updatable charge profiles as cell chemistries evolve, an advantage over hardwired charger ICs in long-lifetime products.
Recommended
Industrial Motor Control and Actuation
While optimized for power conversion, the DSPIC33EP32GS502-E/MX also drives small BLDC/PMSM motors and actuators in industrial equipment. The high-speed PWM generates complementary outputs with programmable dead time for a three-phase inverter, the fast ADC samples phase currents for FOC or sensorless back-EMF control, and the 70 MIPS core executes the control mathematics at the required PWM rate. The 32KB Flash stores the commutation engine plus startup sequencing and fault handling; systems needing CAN connectivity should verify interface requirements since peripheral availability differs across the dsPIC33EP family. The -40C to +125C qualification supports sealed industrial drives and automotive auxiliary actuators where enclosure cooling is limited, and firmware-updatable commutation profiles ease product variants across a single PCB.
Recommended
Automotive Auxiliary Power and Body Electronics
With AEC-Q100 qualification and the extended -40C to +125C E temperature grade, the DSPIC33EP32GS502-E/MX targets automotive auxiliary power conversion: LED headlamp drivers, DC-DC point-of-load converters, and smart actuators. The high-speed ADC/PWM interconnect provides the deterministic control loop needed for lamp current regulation across cold-crank to load-dump supply conditions, and the DSP core handles diagnostics required by functional-safety-adjacent features (the series carries Functional Safety FuSa classification per Microchip). The 28-UQFN exposed-pad package conserves board area in dense body-control modules, and its thermal pad sustains junction temperatures at the top of the automotive range when power stage losses are managed. Firmware-based control enables platform reuse across vehicle trim levels.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS502-E/MX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS502-I/MX | DSPIC33EP64GS502-E/MX | DSPIC33EP16GS502-E/MX | DSPIC33EP32GP502 |
|---|---|---|---|---|---|
| Package | 28-UQFN (MX), exposed pad | 28-UQFN (MX) - same | 28-UQFN (MX) - same | 28-UQFN (MX) - same | 28-pin family package (drop-in on UQFN footprint) |
| 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 | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB |
| Digital-Power Peripherals (HS PWM/PGA ADC) | Yes (GS series) | Yes (GS series) | Yes (GS series) | Yes (GS series) | No (GP general-purpose peripherals) |
| Primary Use Case | Digital SMPS/PFC, extended temp | Digital SMPS/PFC, standard industrial temp | Digital power with large firmware footprint | Cost-reduced compact digital power | General-purpose embedded control |
Key Differentiators
- Extended -40C to +125C automotive temperature grade (vs DSPIC33EP32GS502-I/MX)
- Interconnected digital-power peripherals (vs DSPIC33EP32GP502)
- 32KB Flash balances cost and headroom (vs DSPIC33EP64GS502-E/MX)
Design Notes
The 28-UQFN (MX) package has an exposed pad on the underside that must be soldered to a ground copper pour with an array of thermal vias. This pad is the primary ground and heat-removal path; skipping it causes both elevated junction temperature and increased ground bounce on the analog front end during PWM switching. Follow the Microchip UQFN land-pattern guidance in the GS family datasheet package section, and keep the high-speed PWM gate-drive loops physically separated from the ADC input traces to preserve sampling accuracy.
The dsPIC33EP32GS502 provides multiple PGECx/PGEDx pin pairs for ICSP. Programming tools require ICSPCLK and ICSPDAT to come from the same pair (e.g., PGEC2 with PGED2); mixing pairs from different pairs is a frequent bring-up failure. Connect all VDD and VSS pins during programming and debugging, and reserve a 6-pin ICSP header even in production boards for field firmware updates of the control-loop parameters.
Estimated: the device runs from a single 3.3V rail, and total power dissipation is dominated by core plus I/O current rather than the power stage it controls. Budget the core current per the datasheet electrical characteristics at 70 MIPS, add per-pin I/O loads of the gate-drive outputs, and verify junction temperature using the UQFN thermal resistance with your PCB copper area - especially when operating at the +125C extended limit where margin to Tj(max) shrinks. Decouple each VDD pin with 100 nF close to the pin plus bulk capacitance near the supply entry.
Compliance Information
Distributor listings (Hotenda, Jotrin) classify the part as Automotive, AEC-Q100 within the dsPIC33EP 33EP series with Functional Safety (FuSa) support. RoHS/REACH/lead-free status not explicitly stated in retrieved data - confirm via Microchip product page compliance documents.
