DSPIC33EP32GS202-I/SS - 70MIPS 16-bit DSC 32KB Flash | Microchip
MPN: DSPIC33EP32GS202-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.1 | $31.00 |
| 100 | $2.85 | $285.00 |
| 500 | $2.6 | $1,300.00 |
| 1,000 | $2.35 | $2,350.00 |
DSPIC33EP32GS202-I/SS Overview
A digital signal controller combines the compute throughput of a 16-bit microcontroller with the multiply-accumulate hardware of a digital signal processor. In the power-management hierarchy, DSCs sit between general-purpose MCUs and dedicated digital power ICs, providing programmable control loops for switch-mode power supplies, motor drives, and power factor correction stages where deterministic interrupt latency and fast ADC sampling are essential.
Key features include a 70 MIPS dsPIC33E CPU core, 32KB Flash with self-programming, dual high-resolution PWM modules for SMPS control, a high-speed ADC suited to current-mode control loops, and integrated DAC outputs. The GS (Digital Power) variant adds specialized analog peripherals targeted at digital power conversion, distinguishing it from the GP (general-purpose) and MC (motor control) siblings of the dsPIC33EP32GS202 family.
Architecturally, the device pairs the 16-bit dsPIC core with a zero-overhead DSP engine supporting MAC and dual-fetch operations, enabling single-cycle control-loop execution. Extensive DMA and peripheral pin select (PPS) routing let designers map PWM, ADC, and UART functions to optimal physical pins on the 28-SSOP footprint.
Typical applications include digital switch-mode power supplies, interleaved power factor correction (as demonstrated in Microchip's SMPS reference designs), DC-DC converters, LED drivers, and battery charging systems.
Design consideration: because the GS202 runs from a 3.0V-3.6V supply, level shifting is needed when interfacing to 5V feedback networks common in legacy SMPS designs, and PGEC/PGED pin pairs must be reserved as matched pairs for ICSP programming.
This page synthesizes distributor pricing, drop-in family alternatives, pin guidance, and practical digital-power design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GS202-I/SS — 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 DSPIC33EP32GS202-I/SS (same form factor and footprint) — differing in Operating Temperature, Package, Program Memory Size, Supply Voltage, ADC Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP16GS202-I/SS
✅ Drop-In✓ In Stock
$2.79 / Unit
View Datasheet →DSPIC33EP16GS202T-E/SS
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33EP32MC202-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.68 / Unit
View Datasheet →DSPIC33EP32GP202-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GS202T-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33EP32GS202-I/SS Maximum Ratings & Electrical Characteristics
| Core Type | dsPIC33E 16-bit DSC core |
| CPU Speed | 70 MIPS |
| Program Memory | 32KB Flash |
| Supply Voltage | 3.3 V (3.0 V to 3.6 V) |
| Package | 28-SSOP (5.30 mm width) |
| Pin Count | 28 |
| Operating Temperature | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| Series | dsPIC33EP32GS202 (Digital Power / SMPS) |
| Instruction Set | 16-bit dsPIC with DSP engine (MAC) |
| Debug Interface | ICSP via PGECx/PGEDx pairs |
| Analog Peripherals | High-speed ADC, DAC (GS digital-power variant) |
| Key Applications | Digital SMPS, high-speed ADC, DAC control |
| Packaging Option | Tube |
| Lifecycle Status | In Production (per Microchip product page) |
DSPIC33EP32GS202-I/SS 28-ssop (5.30 mm width) Pin Configuration Guide
Pin configuration for DSPIC33EP32GS202-I/SS (28-ssop (5.30 mm width) 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 DSPIC33EP32GS202-I/SS.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS202-I/SS is suitable for 6 applications: Digital Switch-Mode Power Supply (SMPS), Interleaved Power Factor Correction (PFC), DC-DC Converter Control, Battery Charging Systems, LED Driver Control, Industrial Automation Sensing Nodes.
Digital Switch-Mode Power Supply (SMPS)
The DSPIC33EP32GS202-I/SS is purpose-built for digitally controlled switch-mode power supplies, with its 70 MIPS dsPIC33E core executing current-mode and voltage-mode control loops at switching frequencies well above audible range. The GS-variant high-speed ADC samples inductor current and output voltage with deterministic latency, while the on-chip DAC and comparators support cycle-by-cycle current limiting independent of the CPU. Microchip's interleaved power factor correction reference design demonstrates the family in this exact role. Place the DSC between the feedback divider and the PWM gate drivers; unlike fixed-function controllers, the digital control law can be retuned in firmware without hardware changes, trading slightly higher quiescent power for design flexibility.
Recommended
Interleaved Power Factor Correction (PFC)
Microchip explicitly provides an interleaved PFC reference design based on this dsPIC DSC family, making the DSPIC33EP32GS202-I/SS a strong controller for boost-PFC front ends in offline power supplies. The 70 MIPS core computes the average-current-mode PFC control law each switching cycle, while the high-speed ADC samples input and bus voltages synchronously with the PWM carrier for clean power calculations. The on-chip DAC and analog comparators provide hardware-based overcurrent protection that acts within the same switching period. Because interleave phase management is done in firmware, the same 28-SSOP device supports both single-phase and two-phase designs, and efficiency can be optimized by phase-shedding at light load.
Recommended
DC-DC Converter Control
In point-of-load and isolated DC-DC converters, the DSPIC33EP32GS202-I/SS replaces analog compensation networks with firmware control laws. Its 16-bit DSP engine executes PID or higher-order compensators in single-cycle MAC operations, and the GS-variant ADC samples the output rail with timing locked to the PWM period, avoiding beat-frequency aliasing. Typical implementations run buck or boost converters from tens of kHz to several hundred kHz switching frequency, with the DAC providing programmable reference voltages for output trimming and telemetry. The 3.0V-3.6V supply suits controller-side domains; gate-drive signals must be level shifted to the power stage. Firmware-based control enables runtime efficiency optimization and digital telemetry integration.
Recommended
Battery Charging Systems
Smart battery chargers benefit from the DSPIC33EP32GS202-I/SS combination of precise analog measurement and programmable control. The high-speed ADC tracks charge current and pack voltage for CC/CV charging profiles, while firmware implements temperature-based derating, termination criteria, and multi-chemistry support that analog chargers cannot match. The DAC-comparator path provides independent hardware overcurrent cutoffs required for lithium charging safety, acting even if firmware stalls. At 70 MIPS, the core simultaneously runs the charger control loop and a UART/CAN telemetry link. Designers should allocate a PGECx/PGEDx pair for field firmware updates via ICSP, and scale the 5V-referenced feedback networks down to the device's 3.0V-3.6V domain with resistor dividers.
Recommended
LED Driver Control
Digitally controlled LED drivers use the DSPIC33EP32GS202-I/SS for precise, dimmable constant-current regulation. The GS-variant ADC samples LED current each PWM cycle, and the core regulates it via phase-shifted or peak-current-mode control, achieving dimming linearity and flicker-free operation that analog approaches struggle to match at depth. The 28-SSOP package with its small 5.30mm footprint fits driver boards constrained by luminaire form factors, and the 3.3V domain keeps controller power low. Firmware can implement adaptive thermal derating using an external NTC channel on the ADC, extending LED lifetime. Dimming curves (trailing-edge, leading-edge, 0-10V, DALI-like protocols) are all firmware choices on this single part.
Recommended
Industrial Automation Sensing Nodes
Although optimized for digital power, the DSPIC33EP32GS202-I/SS also serves as a compact industrial sensor node controller. The 16-bit DSP engine performs filtering (IIR/FIR) and oversampling math on ADC channels directly in hardware-assisted instructions, while UART/SPI/I2C via Peripheral Pin Select connects to fieldbus transceivers. The -40C to +85C I-grade rating covers factory-floor environments, and the small 28-SSOP footprint suits dense I/O modules. The 32KB Flash accommodates protocol stacks plus calibration routines, and the DAC output can drive analog retransmission signals (e.g., scaled 0-3.3V loop signals). Note that interfacing with 24V industrial logic requires isolation and level-shifting external to this 3.3V device.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS202-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP16GS202-I/SS | DSPIC33EP16GS202T-E/SS | DSPIC33EP32MC202-I/SS | DSPIC33EP32GP202-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP (5.30mm) | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32KB | 16KB | 16KB | 32KB | 32KB |
| CPU Performance | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Peripheral Emphasis | Digital power (SMPS): high-speed ADC + DAC | Digital power (SMPS) | Digital power (SMPS) | Motor control | General purpose |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Supply Voltage | 3.0 V - 3.6 V | 3.0 V - 3.6 V | 3.0 V - 3.6 V | 3.0 V - 3.6 V | 3.0 V - 3.6 V |
| Lifecycle Status | In Production (Active) | Active | Active | Active | Active |
Key Differentiators
- Digital-power (GS) analog peripheral set (vs DSPIC33EP32GP202-I/SS)
- Full 32KB Flash headroom (vs DSPIC33EP16GS202-I/SS)
- SMPS-focused peripherals vs motor-control focus (vs DSPIC33EP32MC202-I/SS)
Design Notes
Reserve at least one matched PGECx/PGEDx pair as a header for ICSP programming and debugging; per Microchip and NSDSP documentation, PGEC and PGED must be used as a pair (e.g., PGEC2 for ICSPCLK requires PGED2 for ICSPDAT) and should not be multiplexed into the application circuit if possible. Connect all VDD and VSS pins per the data sheet pinout, and decouple each VDD pin with 100nF ceramic capacitors placed within a few millimeters of the pin. Provide ground vias to a solid ground plane under the 28-SSOP for analog performance.
The device operates from a 3.0V-3.6V rail and its I/O is not 5V tolerant, so legacy SMPS feedback networks referenced to 5V must be scaled with resistor dividers or an op-amp buffer before reaching ADC pins. Estimated: a 5V rail monitored through a 2:1 divider (10k/10k) presents 2.5V full-scale, well within the ADC range at 3.3V VDD. Keep the analog supply clean - ferrite bead plus bulk and 100nF local decoupling - since GS-variant ADC accuracy directly determines control-loop fidelity in digital power designs.
Do not assume the GS202 is interchangeable with MC202 or GP202 variants without reviewing the analog peripheral tables in the dsPIC33EPXXGS202 family data sheet (DS70005208E): the pin-compatible variants differ in which ADC, DAC, and comparator channels are available on specific pins. Also remember Peripheral Pin Select (PPS) remapping means a schematic ported from another dsPIC may route functions to non-optional pins (oscillator, ICSP, VDD/VSS) that cannot be moved. Finally, verify compiled firmware size against 32KB Flash before choosing the 16KB GS202 as a cost-down substitute.
Compliance Information
Standard Microchip commercial/industrial product; RoHS-compliant lead-free construction assumed from standard Microchip offerings. Not the AEC-Q100 automotive E-grade variant. Exact compliance certificates should be pulled from the Microchip product page ordering detail.
