DSPIC33FJ09GS302-I/SO - 16-bit 40 MIPS DSC for SMPS | Microchip
MPN: DSPIC33FJ09GS302-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.3 | $33.00 |
| 100 | $2.95 | $295.00 |
| 500 | $2.68 | $1,340.00 |
| 1,000 | $2.41 | $2,410.00 |
DSPIC33FJ09GS302-I/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, a DSC sits above a standard MCU for control-loop tasks: it executes the proportional-integral compensation loops, timing and supervisory logic required in digitally controlled switch-mode power supplies. The dsPIC33FJ09GS302 belongs to Microchip's SMPS-oriented dsPIC33FJ GS family, alongside the flash-smaller dsPIC33FJ06GS101/102/201A/202A parts.
Key features include a modified Harvard 16-bit DSP core with DSP instruction support, high-speed PWM peripherals purpose-built for power conversion, integrated analog (ADC and comparators per Microchip product data), and standard communication interfaces I2C, SPI and UART on 21 I/O pins. These peripherals allow multi-loop digital control of converters without extensive external circuitry.
Architecturally, the core executes up to 40 million instructions per second from a 3.3 V supply (per distributor data), with deterministic interrupt latency suited to fast current-mode control loops. The dedicated PWM module supports complementary outputs and dead-time control typical of half-bridge and interleaved topologies.
Typical applications include AC-to-DC converters, DC-to-DC converters, power factor correction (PFC) stages, uninterruptible power supplies and other digital power-conversion systems, as stated by Microchip. The 28-SOIC package suits compact industrial power boards.
When designing with this device, budget code space carefully: 9 KB of instruction flash is adequate for single-converter control loops but limited for combined PFC plus LLC firmware.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ09GS302-I/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-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature Range, Packaging, Application Focus.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ09GS302-E/SO
✅ Drop-In✓ In Stock
$2.69 / Unit
View Datasheet →DSPIC33FJ06GS202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ06GS202A-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33FJ06GS202AT-I/TL
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →DSPIC33FJ09GS302-I/MM
✅ Drop-In✓ In Stock
$2.11 / Unit
View Datasheet →DSPIC33FJ09GS302-I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33F 16-bit |
| Core Size | 16-Bit |
| Maximum Performance | 40 MIPS |
| Maximum Clock Frequency | 40 MHz |
| Program Memory Size | 9 KB (3K x 24) FLASH |
| RAM Size | 1024 Bytes (1K x 8) |
| Supply Voltage (Nominal) | 3.3 V |
| Number of I/O | 21 |
| Peripherals | High-Speed PWM, ADC, Comparators (SMPS optimized) |
| Connectivity | I2C, SPI, UART |
| Target Application Family | SMPS / Digital Power Conversion |
| Package | 28-SOIC (7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Packaging | Tube |
| Country of Origin | Thailand |
DSPIC33FJ09GS302-I/SO 28-soic (7.50 mm width) Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302-I/SO (28-soic (7.50 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 DSPIC33FJ09GS302-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302-I/SO is suitable for 6 applications: AC-to-DC Converter Control, DC-to-DC Converter Control, Power Factor Correction (PFC), Uninterruptible Power Supplies (UPS), Multi-Loop Digital SMPS Platforms, Industrial Power and Battery Chargers.
AC-to-DC Converter Control
The DSPIC33FJ09GS302-I/SO is purpose-built by Microchip to support AC-to-DC converter control, using its high-speed PWM module to drive primary-side switches while the on-chip ADC samples input and output conditions for closed-loop regulation. At 40 MIPS, the core has ample headroom to execute current-mode and voltage-mode compensation loops in software at switching frequencies typical of off-line supplies. The 9 KB flash holds startup sequencing, protection handlers (overvoltage, overcurrent) and optional UART-based telemetry within a single chip. Because PWM, ADC and comparators are integrated, external analog control circuitry is minimized, reducing BOM cost. Designers should reserve flash budget carefully, since 9 KB fills quickly with soft-start and fault-management code.
Recommended
DC-to-DC Converter Control
For DC-to-DC converters (buck, boost, half-bridge, flyback), the DSPIC33FJ09GS302-I/SO closes digital feedback loops using its high-speed PWM outputs with dead-time control and its integrated ADC for fast output-voltage and inductor-current sampling. The 40 MIPS 16-bit DSP core executes PI or PID compensation deterministically, avoiding the component drift and tolerance issues of analog error amplifiers. With 21 I/O pins and I2C/SPI/UART, the controller also handles housekeeping such as fan control, PMBus-style telemetry and sequencing. The industrial -40C to +85C rating suits telecom and industrial bricks. The 3.3 V nominal supply integrates cleanly with housekeeping rails, and the 28-SOIC package keeps the controller footprint small on dense power boards.
Recommended
Power Factor Correction (PFC)
Microchip explicitly lists Power Factor Correction among the applications supported by the GS family, and publishes an Interleaved PFC reference design working from universal input to a 350 W high-voltage DC output based on these SMPS dsPIC controllers. The DSPIC33FJ09GS302-I/SO implements average-current-mode PFC control digitally: the ADC samples the rectified input voltage and inductor current, the 40 MIPS core computes the current command and compensation, and the high-speed PWM drives the boost switch. On-chip comparators provide fast cycle-by-cycle overcurrent protection independent of software latency. The 9 KB flash accommodates PFC control plus brownout and fault logic. Interleaved multi-phase PFC benefits from the deterministic interrupt latency of the dsPIC33F core.
Recommended
Uninterruptible Power Supplies (UPS)
Microchip identifies uninterruptible power supplies as a target application for the GS SMPS family, and the DSPIC33FJ09GS302-I/SO fits the controller role in compact line-interactive and standby UPS designs. Its high-speed PWM generates the inverter drive waveforms while the ADC monitors battery voltage, output voltage and load current; the 40 MIPS core performs the sinusoidal reference generation and closed-loop inverter regulation in software. The integrated comparators give fast hardware protection for overcurrent events, and I2C/SPI/UART support front-panel communication and battery-management telemetry. The 9 KB flash is sufficient for a standby-topology state machine (mains monitor, transfer logic, alarm handling). The industrial temperature grade covers typical indoor UPS environments.
Recommended
Multi-Loop Digital SMPS Platforms
The defining use case of the DSPIC33FJ09GS302-I/SO is multi-loop digital switch-mode power supply control, where voltage, current and sometimes PFC loops run concurrently. The 16-bit 40 MIPS DSP core with DSP instruction support executes multiple compensation loops without missing sample deadlines, while the high-speed PWM module provides complementary outputs with programmable dead time for bridge topologies. The integrated ADC and comparators handle feedback acquisition and fast protection. With 9 KB of flash, the controller can hold two converter loops plus housekeeping, making it suitable for digital power platform designs that are reused across product families. The 21 I/O pins and I2C/SPI/UART peripherals support inter-controller communication in modular power architectures.
Recommended
Industrial Power and Battery Chargers
Digital battery chargers and industrial auxiliary power supplies benefit from the DSPIC33FJ09GS302-I/SO's combination of PWM control, ADC feedback and communication ports. The 40 MIPS core implements charge-profile state machines (CC/CV, taper, termination) in firmware while the high-speed PWM and comparators regulate the power stage and provide fast fault shutdown. UART or I2C links report charge status to a host or display, and the 21 I/O pins manage LEDs, relays and key inputs. The 28-SOIC (7.50 mm) surface-mount package withstands industrial assembly processes, and the -40C to +85C industrial rating covers unconditioned environments. The 9 KB flash holds charger profiles plus safety logic with reasonable margin.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ09GS302-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ09GS302-E/SO | DSPIC33FJ06GS202-I/SO | DSPIC33FJ06GS202A-I/SO | DSPIC33FJ09GS302-I/MM |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-QFN-S (different footprint) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 9 KB (3K x 24) | 9 KB (3K x 24) | 6 KB | 6 KB | 9 KB (3K x 24) |
| Performance | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Operating Temperature | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Connectivity | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART |
| SMPS-Optimized Peripherals | High-Speed PWM, ADC, Comparators | Same peripheral set | Same peripheral set | Same peripheral set | Same peripheral set |
Key Differentiators
- 50% more flash than GS202 siblings in the same footprint (vs DSPIC33FJ06GS202-I/SO)
- Extended-temperature drop-in available (vs DSPIC33FJ09GS302-E/SO)
- SMPS-specific peripheral integration (vs Generic 16-bit MCUs)
Design Notes
Decouple VDD with a 0.1 uF ceramic capacitor placed as close as possible to the VDD pin, plus a 4.7 uF to 10 uF bulk capacitor per Microchip dsPIC33F design guidelines. In SMPS applications the controller shares a board with fast-switching power stages; a dedicated low-pass filter or ferrite bead on the 3.3 V controller rail prevents switching noise from causing spurious resets. Confirm exact decoupling and supply limits in Microchip data sheet 75018c and the family reference manual.
Keep the DSPIC33FJ09GS302-I/SO on the quiet side of the power board: route PWM outputs away from high dv/dt switch nodes, and give the ADC analog inputs their own grounded guard area on the 28-SOIC footprint. Use a solid ground plane and single-point connection between power ground and controller ground to prevent loop-current errors in ADC readings. Place the oscillator components (if an external crystal is used) close to the OSC1/OSC2 pins with short traces.
Budget the 9 KB flash carefully. Engineers porting firmware from larger dsPIC33 devices frequently overflow code space once protection handlers, soft-start ramps and communication stacks are added - prototype with the XC16 compiler's memory map report early. Also note this part is rated -40C to +85C (I grade); in power supplies where the controller sits near hot components, verify junction temperature margin or select the drop-in DSPIC33FJ09GS302-E/SO rated to +125C. Verify all pin assignments against data sheet 75018c, not older GS-family documentation.
Compliance Information
Compliance status not stated in the provided web data; verify on the Microchip product page or the distributor environmental data sheet before release.
