DSPIC33FJ09GS302-E/SO - 16-bit 40 MIPS DSC 9KB Flash | Microchip
MPN: DSPIC33FJ09GS302-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.34 | $3.34 |
| 10 | $3.02 | $30.20 |
| 100 | $2.87 | $287.00 |
| 500 | $2.76 | $1,380.00 |
| 1,000 | $2.69 | $2,690.00 |
DSPIC33FJ09GS302-E/SO Overview
A Digital Signal Controller combines the compute throughput of a DSP with the peripheral set and ease of use of a microcontroller, sitting in the device hierarchy between a general-purpose 16-bit MCU and a dedicated DSP. Within power-conversion systems, the DSC forms the digital control core that sits above gate drivers and power stages, closing current and voltage control loops in real time.
Key features of the dsPIC33FJ09GS302 family center on digital switch-mode power supply (SMPS) control: high-speed PWM modules with complementary outputs and dead-time control, high-speed analog-to-digital converters, and analog comparators that enable fast overcurrent protection without CPU intervention. According to Microchip, these devices explicitly support common multi-loop digital power-conversion topologies.
The 40 MIPS core executes DSP-class instructions, and the peripheral architecture is optimized so PWM updates, ADC sampling triggers, and comparator trips operate with minimal software latency - critical for peak-current-mode control and cycle-by-cycle current limiting in switching converters.
Typical applications include AC-to-DC converters, DC-to-DC converters, Power Factor Correction (PFC) stages, and uninterruptible power supplies (UPS). Microchip's Interleaved PFC reference design demonstrates the family producing a single high-voltage DC output up to 350 W from a universal AC input.
When designing with this device, budget flash and RAM carefully: 9 KB of program memory and 1 KB of RAM demand efficient fixed-point control code, and the E-grade temperature rating should be verified against enclosure thermal rise in enclosed power supplies.
This page adds engineering value beyond the datasheet: verified distributor pricing as of 2026-09-26, drop-in same-package family alternatives, application guidance, and practical design notes synthesized from multiple sources.
Drop-in alternatives for DSPIC33FJ09GS302-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 DSPIC33FJ09GS302-E/SO (same form factor and footprint) — differing in Package, Mounting Type, Operating Temperature, Core Architecture, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ09GS302-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.41 / Unit
View Datasheet →DSPIC33FJ09GS302T-E/SO
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →DSPIC33FJ06GS202-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ06GS202A-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ06GS202-I/SP
✅ Drop-In✓ In Stock
$3.52 / Unit
View Datasheet →DSPIC33FJ09GS302-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit DSC (dsPIC33F) |
| Maximum CPU Speed | 40 MIPS |
| Program Memory (Flash) | 9 KB |
| RAM | 1024 Bytes |
| Package | 28-pin SOIC (SO) |
| Operating Temperature Range | -40C to +125C (Extended, E grade) |
| Mounting Type | Surface Mount |
| Product Status | In Production |
| Application Focus | Digital Switch-Mode Power Supply (SMPS) |
| Key Peripherals | High-Speed PWM, High-Speed ADC, Comparators |
| Special Function | DSP engine with barrel shifter, multiple internal bus architectures |
| Low-Power Modes | Supported |
| Country of Origin | Thailand |
| RoHS Status | Compliant |
DSPIC33FJ09GS302-E/SO 28-pin soic (so) Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302-E/SO (28-pin soic (so) 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 DSPIC33FJ09GS302-E/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302-E/SO is suitable for 6 applications: AC-to-DC Converters, DC-to-DC Converters, Power Factor Correction (PFC), Uninterruptible Power Supplies (UPS), Digital Lighting and LED Drivers, Battery Chargers and Power Adapters.
AC-to-DC Converters
The DSPIC33FJ09GS302-E/SO fits offline AC-to-DC converter control because its GS-family peripherals pair high-speed PWM with fast ADC sampling and analog comparators, allowing the MCU to close voltage and current loops in switching converters at 40 MIPS while retaining hardware-level overcurrent trip latency. In a typical flyback or forward topology, the ADC samples the output voltage and input current each switching cycle, the control law adjusts PWM duty, and the comparators provide cycle-by-cycle current limiting without software involvement. The 9 KB flash is sufficient for a complete converter controller including soft-start and fault handling, and the -40C to +125C E-grade rating tolerates hot primary-side environments inside sealed enclosures.
Recommended
DC-to-DC Converters
For digitally controlled DC-to-DC modules - buck, boost, or half-bridge stages - the DSPIC33FJ09GS302-E/SO offers the GS-series high-speed PWM with complementary outputs and programmable dead time, which are the core requirements for synchronous rectification. Running at up to 40 MIPS, the DSC executes fixed-point PID or compensator code between consecutive PWM cycles, while the high-speed ADC triggers synchronously from the PWM module to sample inductor current at the optimal point, avoiding switching-noise corruption. The on-chip comparators implement hardware cycle-by-cycle current limit, a safety feature essential in DC-DC designs feeding sensitive loads. Its 1 KB RAM holds state variables for multi-loop control without external memory.
Recommended
Power Factor Correction (PFC)
Microchip explicitly validates this device family for PFC through its Interleaved PFC reference design, which operates from a universal AC input and produces a single high-voltage DC output up to 350 W. The DSPIC33FJ09GS302-E/SO implements the dual-loop PFC structure: a fast inner current loop shaping the input current to follow the rectified sine wave, and a slower outer voltage loop regulating the DC bus. The high-speed PWM updates duty each cycle, the ADC samples input current and bus voltage with PWM-synchronized triggers, and the extended -40C to +125C temperature range suits mounting near hot power stages. The 9 KB flash accommodates interleaving logic, brownout handling, and THD-optimizing feedforward algorithms.
Recommended
Uninterruptible Power Supplies (UPS)
In UPS systems, the DSPIC33FJ09GS302-E/SO can serve as the digital controller for the inverter, charger, and transfer-logic sections. The GS-family's multiple high-speed PWM channels drive inverter bridges and battery-charging converters, while the fast ADC and comparators provide the rapid overcurrent protection that battery-fed inverters demand during short-circuit events. Its DSP capability at 40 MIPS supports the control math for sinusoidal output regulation, and the extended -40C to +125C E-grade rating is appropriate for UPS units installed in warm electrical rooms without forced cooling. The 9 KB flash is adequate for a compact UPS control program handling mode transitions, fault logging, and battery-management routines with careful code budgeting.
Recommended
Digital Lighting and LED Drivers
Digitally controlled LED drivers benefit from the DSPIC33FJ09GS302-E/SO's SMPS-oriented peripherals: the high-speed PWM generates constant-current converter control at switching frequencies beyond audible range, ADC sampling closes the current loop, and comparators deliver instant short-circuit protection for LED strings. At 40 MIPS, the DSC can simultaneously run dimming engines (PWM or analog dimming), communicate over DMX or DALI-style protocols within the 9 KB flash budget, and manage thermal foldback using its ADC inputs. The extended temperature rating of -40C to +125C matches enclosed luminaire environments where driver electronics routinely see high ambient temperatures, reducing derating concerns compared with industrial-grade (85C) controllers.
Recommended
Battery Chargers and Power Adapters
Smart battery chargers and high-power adapters use the DSPIC33FJ09GS302-E/SO to implement multi-stage charging (constant current, constant voltage, top-off) with digitally programmable termination criteria. The GS-family high-speed PWM controls the charging converter stage, the high-speed ADC reads battery voltage, current, and temperature (via NTC channels), and on-chip comparators provide hard-wired overcurrent cutoffs independent of firmware state. The 9 KB flash holds the complete charging state machine including fault recovery, and the -40C to +125C extended range suits outdoor or automotive-adjacent charging equipment. The DSP arithmetic support simplifies coulomb-counting and impedance-estimation math at 40 MIPS execution speed.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ09GS302-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ09GS302-I/SO | DSPIC33FJ06GS202-E/SO | DSPIC33FJ06GS202A-E/SO | DSPIC33FJ06GS202-I/SP |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SPDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 9 KB | 9 KB | 6 KB | 6 KB | 6 KB |
| Temperature Range | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) |
| Application Focus | SMPS / digital power | SMPS / digital power | SMPS / digital power | SMPS / digital power | SMPS / digital power |
Key Differentiators
- Extended temperature rating for hot power-supply environments (vs DSPIC33FJ09GS302-I/SO)
- 50% more program memory than the GS202 in the same footprint (vs DSPIC33FJ06GS202-E/SO)
- SMPS-dedicated peripheral set rather than general-purpose MCU peripherals (vs DSPIC33EV32GM102-I/SO)
Design Notes
Memory budgeting is the primary constraint: 9 KB of flash and 1 KB of RAM must hold the control loops, fault handling, and any communication protocol. Compile early with the XC16 compiler and enable code-size reporting; a multi-loop SMPS controller with soft-start and serial telemetry typically consumes most of this budget. If your application needs a full protocol stack plus power control, evaluate a larger GS-series part before committing the PCB, even though family pin compatibility makes later migration possible.
On digital power boards, keep the DSC's power and ground referenced to signal ground, not the power-stage ground return. Synchronize ADC sampling to the PWM module so current is sampled away from switching edges - sampling during switching transients corrupts current-loop feedback and causes jitter in peak-current-mode control. Route PWM gate-drive traces away from ADC inputs and the oscillator, and place local 0.1 uF decoupling at each VDD pin per Microchip's device connection guidelines in data sheet DS-75018B.
Estimated: even though the DSC itself dissipates little power, the -40C to +125C E-grade ceiling assumes the die stays within rating including self-heating. At 3.3 V with tens of mA of core and I/O current, self-heating is a few tens of milliwatts, which is negligible; the dominant risk is ambient rise inside the power-supply enclosure. Verify that worst-case enclosure ambient plus self-heating stays below 125C, otherwise move to a larger package or improve airflow.
MCLR must be pulled up and made accessible for In-Circuit Serial Programming (ICSP); reserve pads for the programming connector (PGC/PGD pins) on production boards, since firmware updates in the field are common for digitally controlled power supplies. If you plan to migrate between GS202 (6 KB) and GS302 (9 KB) variants across product tiers, design one PCB and stock different MPNs - the 28-pin family footprint is shared, which simplifies sourcing during shortages.
Compliance Information
DigiKey/Mouser listings categorize this part under RoHS-compliant catalog filters. REACH, lead-free, halogen-free, and conflict-minerals statuses were not explicitly stated in the retrieved data - confirm on the Microchip product page or the distributor environmental data sheet.
