DSPIC33FJ09GS302T-I/SS - 16-bit 40 MIPS DSC 9KB Flash | Microchip
MPN: DSPIC33FJ09GS302T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $3.05 | $305.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.45 | $2,450.00 |
DSPIC33FJ09GS302T-I/SS Overview
A digital signal controller combines the deterministic control flow of a microcontroller with the mathematical throughput of a DSP core. Within the power-management hierarchy, DSCs sit above basic MCUs in switching power applications because peripherals such as high-speed PWM, fast ADCs and analog comparators are tightly coupled to the dsPIC33F RISC core, enabling closed-loop control of switch-mode power supplies at switching frequencies well above what a general-purpose MCU can service.
Key differentiating features include a dsPIC33F core executing up to 40 MIPS at 3.3V, dedicated SMPS peripherals (High-Speed PWM with advanced timing, high-speed 10-bit ADC, and analog comparators), and the T designator indicating tape-and-reel packaging for automated assembly. The 9 KB Flash supports field reprogramming, while the 1 KB RAM handles control-loop state variables and PI/PID compensator data for multi-loop SMPS topologies.
Architecturally, the dsPIC33FJ09GS302 belongs to Microchip's GS-series SMPS family (documented in the dsPIC33FJ06GS001/101A/102A/202A and dsPIC33FJ09GS302 data sheet family), which was purpose-built for digital power conversion. The High-Speed PWM module supports complementary outputs, dead-time insertion and fault shutdown - the exact feature set required for half-bridge, full-bridge, flyback and PFC stages.
Typical applications include AC-to-DC converters, DC-to-DC converters, Power Factor Correction (PFC) stages, uninterruptible power supplies (UPS), and LED drivers, where deterministic interrupt latency and integrated analog reduce external component count.
Design consideration: budget the 1 KB SRAM carefully - allocate control-loop coefficients in static storage and avoid dynamic allocation to keep worst-case loop timing deterministic at 40 MIPS.
This page synthesizes distributor availability data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-26.
Drop-in alternatives for DSPIC33FJ09GS302T-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 DSPIC33FJ09GS302T-I/SS (same form factor and footprint) — differing in Package, Packaging, Operating Temperature, Mounting Type, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ09GS302T-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ06GS101AT-I/SS
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33FJ06GS202-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ06GS202AT-I/TL
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →DSPIC33FJ06GS101-E/P
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33FJ09GS302T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC with DSP engine |
| Maximum CPU Speed | 40 MIPS |
| Flash Program Memory | 9 KB |
| SRAM | 1024 Bytes |
| Supply Voltage | 3.3 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-pin SSOP (SS) |
| Mounting Type | Surface Mount |
| Peripherals | High-Speed PWM, ADC, Comparators (SMPS feature set) |
| Target Application Class | Digital Switch-Mode Power Supply (SMPS) |
| Packaging | Tape and Reel (T designator) |
| Data Sheet Family | dsPIC33FJ06GS001/101A/102A/202A and dsPIC33FJ09GS302 |
| Product Type | Digital Signal Controller (DSC) / 16-bit MCU |
| RoHS Status | Compliant |
| Lead Free | Yes |
DSPIC33FJ09GS302T-I/SS 28-pin ssop (ss) Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302T-I/SS (28-pin ssop (ss) 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 DSPIC33FJ09GS302T-I/SS.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302T-I/SS is suitable for 6 applications: AC-to-DC Converter Control, DC-to-DC Converter (Digital Power), Power Factor Correction (PFC), Uninterruptible Power Supply (UPS), LED Driver and Lighting Power, Industrial Power and Battery Charging.
AC-to-DC Converter Control
The DSPIC33FJ09GS302T-I/SS controls offline AC-to-DC converter stages where its 40 MIPS core executes current- and voltage-loop compensators every switching cycle. The High-Speed PWM module generates complementary gate drive with programmable dead time, while the integrated ADC samples the output bus and inductor current with cycle-by-cycle resolution. Microchip explicitly lists AC-to-DC conversion among the target applications of this GS-family device. Using an on-chip comparator for fast overcurrent shutdown removes an external protection IC, reducing BOM cost. Placed between the rectified bus and the power stage gate drivers, the controller achieves deterministic loop timing that analog-only designs cannot match in programmability, at the trade-off of requiring firmware development and code-space management within the 9 KB Flash budget.
Recommended
DC-to-DC Converter (Digital Power)
For isolated and non-isolated DC-to-DC converters - flyback, forward, half-bridge and LLC topologies - the DSPIC33FJ09GS302T-I/SS provides the closed-loop digital control core. Its SMPS-oriented peripheral set (High-Speed PWM with phase-shift capability, fast ADC triggers synchronized to PWM events, and analog comparators) is documented in Microchip data sheet DS-75018B as purpose-built for switch-mode power conversion. A typical implementation clocks the ADC at the PWM frequency so each cycle's duty update reflects the latest sampled current, enabling peak or average current-mode control in firmware. The 3.3V supply simplifies interfacing with logic-level gate drivers. Designers should reserve a portion of the 9 KB Flash for firmware field updates, since digital converters often need tuning updates in production.
Recommended
Power Factor Correction (PFC)
The DSPIC33FJ09GS302T-I/SS is a natural fit for boost-PFC stages, and Microchip backs this use case with an Interleaved PFC reference design based on the SMPS dsPIC family that delivers up to 350W from a universal AC input. The controller's High-Speed PWM supports the interleaved phase relationships needed to cancel input ripple current, while cycle-by-cycle ADC sampling tracks inductor current for average-current-mode PFC control at 40 MIPS - ample throughput for both the current inner loop and the voltage outer loop in one device. On-chip comparators provide hardware-level overcurrent protection with microsecond response, independent of firmware latency. The 9 KB Flash accommodates both control algorithms and housekeeping code such as inrush management and brownout handling.
Recommended
Uninterruptible Power Supply (UPS)
In UPS designs the DSPIC33FJ09GS302T-I/SS manages the inverter, charger and transfer logic within one controller, a combination Microchip names directly among this family's target applications. The High-Speed PWM generates the sine-modulated inverter gating, the ADC samples battery voltage, bus voltage and output current, and the comparators implement fast fault thresholds. The 40 MIPS DSP engine executes the sine-reference lookup and PI loops with headroom, and the 9 KB Flash holds state machines for line/battery/backup mode transitions. Because the industrial temperature grade covers -40C to +85C, the controller suits both indoor server UPS and outdoor telecom power cabinets. Designers should map the 1 KB RAM statically, allocating control variables to deterministic addresses for predictable interrupt latency.
Recommended
LED Driver and Lighting Power
Digitally controlled LED drivers benefit from the DSPIC33FJ09GS302T-I/SS's ability to run constant-current loops with PWM dimming in a single chip. The High-Speed PWM module produces the main switching converter drive, while a second PWM channel can generate dimming waveforms with precise resolution at 40 MIPS time base. The ADC samples LED current each cycle for tight regulation despite forward-voltage drift with temperature, and the industrial temperature range supports enclosed luminaires and street-lighting cabinets reaching high ambients. Using one digital controller for both power conversion and dimming communication parsing (within the 9 KB Flash) eliminates a separate MCU, cutting system cost. The trade-off is firmware complexity versus a simpler analog dimming approach, justified in tunable or networked lighting products.
Recommended
Industrial Power and Battery Charging
Industrial battery chargers and distributed power shelves use the DSPIC33FJ09GS302T-I/SS for multi-stage charging control (CC/CV/trickle) with digital supervision. The GS-family SMPS peripherals handle the power-conversion loop, while spare CPU bandwidth at 40 MIPS runs charge-state logic, fault logging and status signaling. The -40C to +85C industrial rating and 3.3V logic suit factory-floor environments, and Microchip's E-temperature alternative covers hotter enclosures. The on-chip comparators enforce hardware charge-current limits independent of firmware, protecting battery cells during software faults. Developers working within the 1 KB SRAM should define fixed-size control structures at build time. For charger products requiring CAN or larger protocol stacks, the pin-related dsPIC33EV family offers migration with more memory.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ09GS302T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ09GS302T-E/SS | DSPIC33FJ06GS101AT-I/SS | DSPIC33FJ06GS202-I/SS | DSPIC33FJ06GS202AT-I/TL |
|---|---|---|---|---|---|
| Package | 28-SSOP (SS) | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP (TL code) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 9 KB | 9 KB | 6 KB | 6 KB | 6 KB |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS class (GS family) | 40 MIPS class (GS family) | 40 MIPS class (GS family) |
| Temperature Grade | -40C to +85C (Industrial, I) | Extended (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| SMPS Peripherals (High-Speed PWM, ADC, Comparators) | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Largest Flash in the 28-SSOP GS SMPS family (vs DSPIC33FJ06GS202-I/SS)
- Same die available in extended temperature grade (vs DSPIC33FJ09GS302T-E/SS)
- SMPS-optimized peripheral integration (vs Generic 16-bit MCUs (non-digital-power families))
Design Notes
Decouple the 3.3V supply with at least one 0.1 uF ceramic capacitor placed within 5 mm of each VDD/VSS pin pair, plus a 4.7-10 uF bulk capacitor near the controller. In SMPS layouts the dsPIC33F shares its ground domain with high di/dt power-stage currents; use a single-point star or solid ground plane and keep the PWM output traces short to minimize gate-driver ring-back. Estimated: gate-drive trace inductance of 10 nH with 1 A/ns switching edge induces ~10 V of ringing - route PWM and analog sense lines away from switch nodes.
The 9 KB Flash and 1 KB SRAM fill quickly once ISR-based control loops plus communications are added. Enable the compiler map file early and set a firmware budget (e.g., 80% Flash maximum) before feature freeze. Avoid dynamic memory allocation - reserve control coefficients statically so the worst-case interrupt latency at 40 MIPS stays deterministic for cycle-by-cycle ADC sampling. Also verify ADC sample triggers are synchronized to PWM events rather than free-running, per Microchip's SMPS family application guidance in DS-75018B.
Estimated: the 28-SSOP package in a GS-family dsPIC33F at 40 MIPS typically dissipates well under 0.5 W, so junction temperature rise above a 70C ambient stays modest with a standard multilayer PCB. However, industrial enclosures for PFC and UPS products routinely reach +85C ambient, which is the top of the -I grade rating. If your enclosure exceeds this, plan the drop-in migration to the DSPIC33FJ09GS302T-E/SS extended-temperature variant now - the identical 28-SSOP footprint makes this a zero-PCB-change decision.
Keep analog sense inputs (current shunt, output voltage divider) on a quiet island separated from PWM and switch-node copper, and filter ADC inputs with small RC networks (estimated 100 ohm to 1 kohm with 1 nF) sized against your sampling rate. Route the comparator overcurrent input directly to the shunt with Kelvin connection so hardware fault thresholds are accurate regardless of ground bounce in the power stage.
Compliance Information
RoHS compliance and lead-free status consistent with current Microchip catalog packaging; formal REACH/halogen/conflict-minerals declarations should be requested from Microchip.
