DSPIC33EP32GS502-E/SO - 16-bit 60MIPS DSC 32KB | Microchip
MPN: DSPIC33EP32GS502-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.44 | $4.44 |
| 10 | $4.2 | $42.00 |
| 100 | $3.98 | $398.00 |
| 500 | $3.75 | $1,875.00 |
| 1,000 | $3.55 | $3,550.00 |
DSPIC33EP32GS502-E/SO Overview
A Digital Signal Controller combines the computational throughput of a DSP with the peripheral set and ease of use of a microcontroller. In the power-management hierarchy, the DSC sits at the heart of a closed-loop SMPS system, replacing analog control loops with firmware-based digital control, enabling adaptive algorithms, soft-start profiles, and real-time telemetry in a single power management IC.
Key features of the DSPIC33EP32GS502 include an interconnected high-speed PWM module designed for power conversion topologies, a high-speed analog-to-digital converter, on-chip DACs, programmable gain amplifiers (PGA), and analog comparators - the interconnected analog front end the manufacturer datasheet highlights as 'interconnected High-Speed PWM, ADC, PGA and Comparators.' The part also carries Microchip's Functional Safety (FuSa) support designation.
Architecturally, the dsPIC33EP core executes an enhanced 16-bit instruction set with DSP multiply-accumulate instructions, allowing single-cycle MAC operations for control-law computation. Tight coupling between the ADC and PWM enables trigger-synchronized sampling at the midpoint of the switching period, minimizing control-loop latency in peak-current-mode or voltage-mode converters.
Typical applications include AC-DC power supplies, power factor correction (PFC) stages, DC-DC converters, digital lighting ballasts, battery chargers, and solar micro-inverters. Microchip publishes an interleaved PFC reference design for this family.
Design consideration: the -E temperature variant (-40C to +125C) makes this part suitable for automotive-adjacent and industrial environments; confirm decoupling and SOIC thermal pad copper area for high switching-frequency designs.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GS502-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 DSPIC33EP32GS502-E/SO (same form factor and footprint) — differing in Package, Operating Temperature, ADC Resolution, Functional Safety Support, Max CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP64GS502
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP16GS502
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33EP32GS502-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC |
| Max CPU Speed | 60 MIPS |
| Program Memory (FLASH) | 32 KB (32K x 8) |
| Package | 28-SOIC |
| Operating Temperature | -40C to +125C (E grade) |
| Supply Voltage | 3 V to 3.6 V |
| Application Focus | Digital Power / SMPS |
| Functional Safety Support | Yes (FuSa designated) |
| High-Speed PWM | Interconnected High-Speed PWM module |
| High-Speed ADC | Yes |
| DAC | Yes (on-chip) |
| Programmable Gain Amplifier | Yes (PGA) |
| Comparators | Yes (analog comparators) |
| Mounting Type | Surface Mount |
| Datasheet Length | 390 pages |
DSPIC33EP32GS502-E/SO 28-soic Pin Configuration Guide
Pin configuration for DSPIC33EP32GS502-E/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 DSPIC33EP32GS502-E/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS502-E/SO is suitable for 6 applications: AC-DC Digital Power Supplies, Interleaved Power Factor Correction, DC-DC Converters and Point-of-Load Regulation, Digital LED Drivers and Lighting Ballasts, Battery Chargers and Power Conversion Telemetry, Solar Micro-Inverters and Renewable Power Conversion.
AC-DC Digital Power Supplies
The DSPIC33EP32GS502-E/SO fits AC-DC power supplies because its interconnected high-speed PWM generates phase-shifted or complementary switching outputs while the high-speed ADC samples output voltage and current synchronously with PWM triggers, closing the digital control loop with minimal latency. In a typical flyback or LLC converter, the controller runs a firmware PID loop at the switching frequency, replacing optocoupler-based analog feedback with digital precision and enabling programmable soft-start, burst mode, and fault protection. Placed on the secondary or primary side with its PGA conditioning current-sense signals, it delivers adaptive control that analog controllers cannot reconfigure. The trade-off versus a dedicated analog PWM controller is firmware development effort and the 3.0-3.6 V supply requirement, offset by full design reusability across power ratings.
Recommended
Interleaved Power Factor Correction
The DSPIC33EP32GS502-E/SO is well suited to interleaved PFC because Microchip provides an interleaved PFC reference design for the SMPS dsPIC family, and the interconnected high-speed PWM can drive two interleaved boost phases with programmable phase offset. The high-speed ADC samples each phase inductor current at mid-PWM-ramp, and the comparators support fast cycle-by-cycle overcurrent protection without CPU intervention. At 60 MIPS, the core sustains average-current-mode PFC loops at typical 65-300 kHz switching frequencies while tracking the rectified line waveform for near-unity power factor. The digital approach allows per-phase current balancing in firmware, something analog PFC controllers implement poorly. Design consideration: budget core headroom during line zero-crossings where control effort peaks, and use the extended -E temperature grade inside sealed adapter enclosures.
Recommended
DC-DC Converters and Point-of-Load Regulation
For synchronous buck, boost, and buck-boost DC-DC converters, the DSPIC33EP32GS502-E/SO provides the complete digital control chain in one 28-pin device: the high-speed PWM produces the switching waveform with sub-nanosecond-class resolution and dead-time control, the high-speed ADC samples VOUT and inductor current on PWM triggers, and the on-chip DAC and comparators implement fast threshold protection. The PGA amplifies low-level shunt signals before conversion, removing an external op-amp stage. Digital control enables output-voltage telemetry, adaptive voltage positioning, and firmware-tunable loop compensation across load ranges - advantages that analog point-of-load controllers cannot offer. The 3.0-3.6 V operating window requires a small bias LDO in 5 V or 12 V input systems, adding minor BOM cost relative to the flexibility gained.
Recommended
Digital LED Drivers and Lighting Ballasts
The DSPIC33EP32GS502-E/SO suits high-power LED drivers because the high-speed PWM supports both switching control and dimming resolution, while the ADC and comparators provide output-current regulation and fast short-circuit protection. Constant-current loops at 50-300 kHz are handled by firmware control using the 60 MIPS DSP core with single-cycle MAC instructions for efficient proportional-integral computation. Digital implementation enables smooth 0-100% dimming curves, temperature-derating of LED current using the ADC inputs, and communication-ready architectures (DALI or DMX front ends via the serial peripherals). The -E grade (-40C to +125C) addresses luminaire environments where ambient temperatures near the driver electronics routinely exceed 85C. Trade-off: LED flicker performance depends on loop bandwidth, so verify PWM resolution against target dimming depth during design.
Recommended
Battery Chargers and Power Conversion Telemetry
The DSPIC33EP32GS502-E/SO is a strong fit for smart battery chargers: the high-speed PWM controls the charging power stage (buck or flyback), the high-speed ADC tracks battery voltage, current, and temperature, and the DAC/comparator pair provides hardware overvoltage cutoffs independent of firmware. Charging profiles - CC/CV, taper, temperature-gated - are simply firmware state machines, enabling one hardware platform across lithium-ion, lead-acid, and nickel chemistries. The DSP core leaves headroom for coulomb counting and communication protocols for charger-to-host telemetry. Its 32 KB FLASH accommodates the charging algorithm plus protocol stack with room to spare. The key design consideration is ADC sampling synchronization: trigger conversions on PWM events to avoid switching-noise corruption of current readings, per the interleaving guidance in the manufacturer's digital-power reference designs.
Recommended
Solar Micro-Inverters and Renewable Power Conversion
In solar micro-inverters and small renewable converters, the DSPIC33EP32GS502-E/SO handles maximum-power-point-tracking (MPPT) and grid-current control simultaneously: the high-speed PWM drives the power stage(s), the high-speed ADC samples panel voltage/current and grid waveforms, and the 60 MIPS DSP core executes MPPT perturb-and-observe or incremental-conductance algorithms with single-cycle MAC operations. Firmware-defined control allows the same silicon to serve different grid codes and panel configurations - a decisive advantage over fixed-function analog controllers. The interconnected ADC-to-PWM triggering minimizes phase latency in the current loop, which is critical for grid-distortion compliance. The extended -40C to +125C temperature range of the -E grade suits outdoor enclosure mounting near hot power stages. Verify isolated-gate-driver propagation delay budgeting alongside the digital control latency in your loop-stability analysis.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS502-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS502-I/SO | DSPIC33EP64GS502 | DSPIC33EP16GS502 | 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 |
| Core / Performance | 16-bit DSC, 60 MIPS | 16-bit DSC, 60 MIPS | 16-bit DSC, 60 MIPS | 16-bit DSC, 60 MIPS | 16-bit MCU, 60 MIPS |
| FLASH Memory | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB |
| High-Speed PWM / Digital-Power Peripherals | Yes (GS: PWM + ADC + PGA + comparators + DAC) | Yes (identical GS set) | Yes (identical GS set) | Yes (identical GS set) | No (GP variant, standard peripherals only) |
| SMPS Suitability | Purpose-built | Purpose-built | Purpose-built | Purpose-built | Not recommended for SMPS |
Key Differentiators
- Extended -40C to +125C temperature range (vs DSPIC33EP32GS502-I/SO)
- Interconnected digital-power analog front end (vs DSPIC33EP32GP502T-E/SO)
- Footprint-upgradeable memory path (vs DSPIC33EP64GS502)
Design Notes
The DSPIC33EP32GS502-E/SO operates from 3.0 V to 3.6 V. In 5 V or 12 V systems, derive the controller rail with a small 3.3 V LDO (e.g., MCP1702 family) or a wide-VIN buck. Decouple every VDD pin with 100 nF ceramic placed within a few millimeters of the pin, plus bulk capacitance near the package. In SMPS layouts, keep the controller's analog ground star-connected away from power-stage return currents to prevent ADC ground-bounce errors. Estimated: at 60 MHz operation, core supply current is in the tens-of-milliamps class per typical dsPIC33EP family figures - budget regulator headroom accordingly.
All VDD and VSS pins must be connected, per Microchip's ICSP programming requirements. Route the PGECx/PGEDx pair you select for ICSP as matched, short traces to a programming header - the device has multiple pairs and they must not be mixed (PGEC2 with PGED2, for example). Keep the high-speed ADC input traces short, guarded by ground, and physically separated from high-dv/dt switch nodes and gate-drive traces. Reference the manufacturer's interleaved PFC reference design layout for a proven example of separating the digital controller region from the power stage on a two-layer board.
Two frequent mistakes with the GS family: (1) triggering ADC conversions free-running instead of on PWM events, which corrupts current readings with switching noise - always synchronize sampling to the PWM period per the digital-power reference designs; (2) swapping temperature grades (E vs I) without re-checking worst-case enclosure temperatures - the -I variant tops out at +85C versus +125C for the -E variant, and power supplies commonly exceed 85C near hot components. Also confirm device ID after programming when substituting family members (16/32/64 KB variants), as toolchains key off the exact part number.
Compliance Information
Compliance data was not present in the verified web data. Consult the Microchip product page for current RoHS/REACH environmental declarations for this exact ordering code.
