DSPIC33EP32GS502-I/2N - 16-bit 70 MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33EP32GS502-I/2N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.99 | $3.99 |
| 10 | $3.79 | $37.90 |
| 100 | $3.59 | $359.00 |
| 500 | $3.39 | $1,695.00 |
| 1,000 | $3.19 | $3,190.00 |
DSPIC33EP32GS502-I/2N Overview
A digital signal controller combines the computing capabilities of a microcontroller with the signal-processing acceleration of a digital signal processor. Within the power-management hierarchy, the dsPIC DSC sits above general-purpose MCUs for control-loop-heavy tasks: it executes the fast PID and compensator math needed to close current and voltage loops inside switching power supplies, making it a cornerstone device class in digital switched-mode power supply (SMPS) design.
Key features of the DSPIC33EP32GS502-I/2N include its 16-bit dsPIC33EP core clocked at up to 70 MIPS, 32KB (32K x 8) of FLASH program memory, a high-speed analog-to-digital converter tailored for power conversion sampling, and a DAC for comparator/reference duties. The GS series is Microchip's digital-power-optimized family, pairing fast ADC sampling with PWM peripherals designed for SMPS topologies such as buck, boost, LLC, and power factor correction stages. The part belongs to the Functional Safety (FuSa) qualified dsPIC 33EP series, supporting safety-conscious industrial designs.
Architecturally, the device executes DSP-class instructions (MAC, divide) for control algorithms while retaining full PIC MCU peripheral compatibility. The exposed-pad UQFN-28 package improves thermal dissipation and gives short analog trace paths for the high-speed ADC inputs - important when sampling switch-node waveforms at hundreds of kilohertz.
Typical applications include digital AC/DC and DC/DC power supplies, interleaved power factor correction (PFC), battery chargers, LED drivers, and digitally controlled lighting or telecom power stages. Microchip's own reference design uses the dsPIC33EP32GS502 family for an interleaved PFC application, demonstrating its fit in high-performance power conversion.
When designing with this DSC, budget careful attention to ADC sampling timing versus PWM update rates - the whole point of the GS family is deterministic loop closure - and use the exposed thermal pad for ground return of the analog domain.
This page synthesizes distributor pricing, drop-in same-family alternatives, practical design notes, and comparison data not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33EP32GS502-I/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-I/2N (same form factor and footprint) — differing in Operating Temperature, Package, Packaging, Product Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP64GS502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP16GS502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GP502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP16GP502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GS502-I/2N Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC 16-bit DSC |
| Core Size | 16-bit |
| Maximum Speed | 70 MIPS |
| Program Memory Size | 32KB (32K x 8) FLASH |
| Supply Voltage Range | 3 V to 3.6 V |
| Operating Temperature | -40C to +85C |
| Package | 28-UQFN (6x6 mm) Exposed Pad |
| Mounting Type | Surface Mount |
| Product Status | Active (In Production) |
| Series | dsPIC 33EP, Functional Safety (FuSa) |
| Primary Application Focus | Digital Power / SMPS, High Speed ADC, DAC |
| Packaging | Tube |
DSPIC33EP32GS502-I/2N 28-uqfn (6x6 mm) exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP32GS502-I/2N (28-uqfn (6x6 mm) 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-I/2N.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS502-I/2N is suitable for 6 applications: Digital AC/DC Power Supplies, Interleaved Power Factor Correction (PFC), DC/DC Converters and Point-of-Load Regulation, Battery Chargers, Digital LED Drivers, Industrial Control and Sensing Nodes.
Digital AC/DC Power Supplies
The DSPIC33EP32GS502-I/2N fits AC/DC SMPS designs because Microchip explicitly targets this family at 'Digital Power SMPS' with a high-speed ADC that samples output voltage and inductor current fast enough for loop closure at converter switching frequencies. Its 70 MIPS core executes PID and 2p2z compensator algorithms in firmware, replacing analog compensation networks and enabling programmable soft-start, adaptive dead-time, and fault response. The on-chip DAC feeds internal comparators for cycle-by-cycle overcurrent protection without external components. Used between the rectified input and output regulation stages, it delivers quantifiable benefits: tighter transient response and field-updatable control behavior - though firmware development effort exceeds that of fixed analog controllers.
Recommended
Interleaved Power Factor Correction (PFC)
Microchip provides a dedicated interleaved PFC reference design based on the dsPIC33EP32GS502 family, confirming direct fit for this application. Interleaved PFC requires precise phase-shifted PWM outputs and simultaneous sampling of two phase currents plus the bus voltage - capabilities aligned with the GS family's power-conversion PWM peripherals and high-speed ADC. The 70 MIPS DSP core performs the input-current shaping and current-sharing math between interleaved legs each switching cycle. Placed as the controller between the boost inductors and the bulk capacitor stage, it achieves high power factor and low THD while supporting inrush and brown-out handling in firmware; the trade-off is that deterministic loop timing must be budgeted carefully in software.
Recommended
DC/DC Converters and Point-of-Load Regulation
For digitally controlled DC/DC bricks and point-of-load converters, the DSPIC33EP32GS502-I/2N provides the fast control loop hardware the task demands: the GS-series high-speed ADC samples the output rail and current-sense signals, and the 70 MIPS core closes the loop with firmware compensators running at switching frequency. The on-chip DAC and comparators enable hardware-level fast overcurrent trips, while the 3V-3.6V supply and -40C to +85C range suit telecom and industrial 12V/48V intermediate-bus architectures. The 6x6 mm exposed-pad UQFN keeps the controller physically close to the power stage, shortening sensitive analog traces; designers should verify thermal margin using the exposed pad as the main ground path.
Recommended
Battery Chargers
Battery charging profiles - CC/CV transitions, temperature-qualified charging, termination detection - map naturally onto the DSPIC33EP32GS502-I/2N's combination of a DSP-class core, fast ADC, and firmware-defined state machines. The controller reads charge current and pack voltage through the high-speed ADC, executes the charging algorithm on its 70 MIPS core, and drives power-stage PWM with programmable soft transitions. The 32KB FLASH holds charging profiles for multiple chemistries with room for logging and communication. Because the -40C to +85C industrial rating covers most charger environments and the FuSa family classification supports safety-relevant protection logic, the device consolidates charging control, protection, and telemetry in a single 28-pin chip.
Recommended
Digital LED Drivers
High-brightness and architectural LED drivers benefit from the DSPIC33EP32GS502-I/2N's digital dimming and current regulation capability. The power-conversion PWM peripherals generate dimming waveforms with fine resolution, while the high-speed ADC continuously monitors LED string current for closed-loop regulation and open/short fault detection via the DAC-comparator path. Running at 70 MIPS, the DSC handles dimming curves, thermal foldback, and communication protocols (DALI-style logic can be bit-banged from the 3.3V GPIO) concurrently. The 6x6 mm UQFN footprint suits compact driver boards inside luminaires, and firmware-based control lets one hardware platform serve multiple power levels and dimming standards, reducing BOM proliferation across a lighting product line.
Recommended
Industrial Control and Sensing Nodes
Beyond pure power conversion, the DSPIC33EP32GS502-I/2N serves general industrial nodes that combine signal processing with control: motor-adjacent actuators, digitally controlled heaters, and sensor fusion endpoints. Its 16-bit DSP core executes filtering and transform math (FIR, FFT fragments) at 70 MIPS, the high-speed ADC digitizes transducer signals, and standard MCU peripherals provide UART/I2C/SPI links to PLC backbones. The industrial -40C to +85C rating and Functional Safety (FuSa) family classification align with industrial quality expectations, and the 32KB FLASH supports protocol stacks alongside the application. The exposed-pad 28-UQFN package provides robust surface-mount assembly for vibration-prone industrial environments; consider the 64KB sibling when protocol complexity grows.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS502-I/2N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP64GS502-I/2N | DSPIC33EP16GS502-I/2N | DSPIC33EP32GP502-I/2N | DSPIC33EP64GP502-I/2N | DSPIC33EP16GP502-I/2N |
|---|---|---|---|---|---|---|
| Package | 28-UQFN (6x6 mm) | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | dsPIC 16-bit, 70 MIPS | dsPIC 16-bit, 70 MIPS | dsPIC 16-bit, 70 MIPS | dsPIC 16-bit, 70 MIPS | dsPIC 16-bit, 70 MIPS | dsPIC 16-bit, 70 MIPS |
| FLASH Program Memory | 32KB (32K x 8) | 64KB (+100%) | 16KB (-50%) | 32KB | 64KB | 16KB |
| Family Analog Focus | Digital power: high-speed ADC + DAC (GS) | Digital power GS - same | Digital power GS - same | General purpose GP analog | General purpose GP analog | General purpose GP analog |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Digital-power-optimized analog subsystem (vs DSPIC33EP32GP502-I/2N)
- Mandatory memory ceiling of 32KB FLASH (vs DSPIC33EP64GS502-I/2N)
- FuSa-classified 33EP series in a compact 28-pin package (vs DSPIC33EP16GS502-I/2N)
Design Notes
The /2N suffix denotes the 28-UQFN (6x6 mm) package with an exposed thermal pad. Solder the exposed pad to a solid ground plane array of thermal vias - it is both the primary heat removal path and the low-inductance analog ground return for the high-speed ADC, which is critical in digital power layouts where switch-node transients would otherwise corrupt ADC readings. Keep the ADC input traces short, away from PWM switching nets, and referenced to a quiet analog ground island tied back through the exposed pad.
Supply the controller from a clean 3.3V rail within the 3V to 3.6V window. In digital power supplies the controller rail is frequently derived from the converter's own auxiliary winding; add local decoupling (100 nF ceramic at each VDD/AVDD pin plus bulk capacitance) and follow the Microchip family datasheet recommendation for the core regulator capacitor, since dsPIC33EP devices integrate a core regulator requiring a specific external capacitor value for stability. Verify brown-out behavior of the auxiliary rail at converter startup.
Deterministic control-loop timing is the entire value proposition of the GS family: budget ADC sample time, conversion, compensator execution, and PWM update against the switching period in the firmware scheduler, and use ADC interrupt-triggered loop closure rather than polled sampling to avoid jitter. Also note that the -I suffix gives -40C to +85C only - for enclosures where ambient near the IC can exceed 85C (sealed LED drivers, outdoor power supplies), derate or add airflow, since junction temperature will run above ambient at full peripheral load.
Compliance Information
Verified web data does not include explicit RoHS/REACH/lead-free statements for this MPN; consult the Microchip product page environmental documents. Not an automotive AEC-Q100 part listing; industrial grade (-I suffix, -40C to +85C).
