DSPIC33FJ09GS302-I/SP - 16-bit DSC 40MIPS SMPS DSC | Microchip
MPN: DSPIC33FJ09GS302-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.66 | $3.66 |
| 10 | $3.4 | $34.00 |
| 100 | $3.1 | $310.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.6 | $2,600.00 |
DSPIC33FJ09GS302-I/SP Overview
A digital signal controller combines the computational power of a DSP engine with the control peripherals and ease of use of a microcontroller, sitting between an MCU and a dedicated DSP in the embedded control hierarchy. DSCs are the preferred choice for closed-loop power conversion, where fast control loops and specialized PWM hardware must coexist with general-purpose firmware.
Key features of the GS302 include high-speed PWM modules purpose-built for switch-mode power supplies, an on-chip ADC for current and voltage sensing, integrated analog comparators, and DSP engine instructions including a barrel shifter and multiple internal bus architectures, as described by Microchip USA. The 24-bit wide flash program memory and boundary-scan support simplify development and production programming.
Technically, the dsPIC33FJ09GS302 belongs to Microchip's SMPS-focused dsPIC33FJ GS family. Its architecture couples a 16-bit RISC core running at up to 40 MIPS with dedicated power-conversion peripherals, so control loops for voltage-mode or current-mode regulation can execute deterministically at switching frequencies common in AC/DC converters and PFC stages.
Typical applications include AC to DC converters, DC to DC converters, Power Factor Correction (PFC), and uninterruptible power supplies (UPS), alongside battery chargers, LED drivers, and digital lighting ballasts, where multi-loop SMPS control is the core requirement.
A key design consideration: the 3.0 V to 3.6 V supply window means the controller is powered by a regulated 3.3 V rail; place local decoupling close to both VDD pins and route sensitive analog inputs away from PWM switching nodes to protect ADC accuracy.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ09GS302-I/SP — 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/SP (same form factor and footprint) — differing in Operating Temperature, Package, Mounting Type, Core Architecture, Series.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ06GS202-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.52 / Unit
View Datasheet →DSPIC33FJ06GS202A-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1 / Unit
View Datasheet →DSPIC33FJ09GS302-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC RISC with DSP engine |
| Maximum Clock Frequency | 40 MHz (40 MIPS operation) |
| Program Memory (Flash) | 9 KB (24-bit wide instruction words) |
| Data RAM | 1024 Bytes |
| Supply Voltage Range | 3 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 28-pin SPDIP |
| Mounting Type | Through Hole |
| Peripheral Specialization | High-Speed PWM, ADC, Comparators (SMPS family) |
| Target Applications | SMPS, AC/DC, DC/DC, PFC, UPS |
| DSP Features | Barrel shifter, multiple internal buses, boundary scan |
| Process Technology | CMOS |
| Product Family | dsPIC33FJ06GS/GS302 Digital Signal Controllers |
| Packaging | Tube |
| Estimated Unit Price | Approx. 3.66 USD (LCSC, as of 2026-09-26) |
DSPIC33FJ09GS302-I/SP 28-pin spdip Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302-I/SP (28-pin spdip 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/SP.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302-I/SP is suitable for 6 applications: AC to DC Converter Control, DC to DC Converter, Power Factor Correction (PFC), Uninterruptible Power Supply (UPS), Digital Lighting and LED Drivers, Battery Chargers and Power Monitoring.
AC to DC Converter Control
The DSPIC33FJ09GS302-I/SP directly implements digital control of offline AC/DC converters, where its high-speed PWM module generates the primary switching waveform and the on-chip ADC samples output voltage and input current in a synchronized fashion. Running at up to 40 MIPS from 9 KB flash, the DSC closes voltage- and current-mode loops deterministically at switching frequencies typical of flyback and forward topologies. Using the DSC replaces analog compensation networks with firmware, enabling programmable regulation, soft-start, and fault handling. A 3.3 V auxiliary rail powers the controller, and comparator peripherals provide cycle-by-cycle overcurrent protection without CPU intervention.
Recommended
DC to DC Converter
For isolated and non-isolated DC/DC stages such as buck, boost, and half-bridge converters, the GS302 pairs its high-speed PWM outputs with the ADC to build fast inner current loops. The 40 MIPS DSP core executes compensator math (PI or PID with fixed-point arithmetic) within the PWM period, achieving bandwidths that analog implementations approximate but digital designs make reconfigurable. Its 3.0 V to 3.6 V operation keeps the controller isolated from the power stage while comparators flag faults immediately. The 28-pin SPDIP package suits prototyping and low-volume industrial converters where through-hole assembly and field firmware updates are practical.
Recommended
Power Factor Correction (PFC)
Microchip explicitly targets PFC with the dsPIC33FJ09GS302 family and offers an Interleaved PFC reference design that accepts universal AC input and delivers a single high-voltage DC output up to 350 W. The GS302 implements average-current-mode PFC by synchronizing ADC sampling of the input sinusoid with PWM triggers, computing the current command, and driving the boost switch through high-speed PWM with dead-time control. Its 40 MIPS core leaves margin for feedforward harmonic correction and brownout protection. Integrated comparators enable instant overcurrent shutdown, meeting safety expectations for PFC front ends.
Recommended
Uninterruptible Power Supply (UPS)
UPS products require coordinated control of an AC/DC charger stage, a DC/AC inverter, and fast transfer logic - exactly the multi-loop scenario Microchip lists for the GS302 family. The DSC's DSP engine and 40 MIPS throughput allow simultaneous management of the inverter sinusoidal PWM output and the battery charge profile, while the ADC streams phase currents and battery voltage. On-chip comparators provide hardware overcurrent trips that react faster than any software loop. The 9 KB flash accommodates state machines for line mode, battery mode, and bypass transfer with protective sequencing in a single 28-pin device.
Recommended
Digital Lighting and LED Drivers
High-brightness LED drivers and lighting ballasts benefit from the GS302's ability to combine constant-current regulation, dimming control, and fault protection in firmware. The high-speed PWM resolution supports precise current shaping to minimize flicker, while the ADC monitors LED string voltage and thermistor inputs for derating logic. With 40 MIPS of headroom, the controller can simultaneously manage power factor for offline luminaires and communicate with dimming interfaces. The industrial -40C to +85C rating suits enclosed fixtures, and the SPDIP package simplifies evaluation and small-batch production of lighting prototypes.
Recommended
Battery Chargers and Power Monitoring
Smart battery chargers need charge-profile state machines (CC/CV, taper, termination), current-loop control, and protection - all well matched to the GS302's SMPS peripheral set. The high-speed PWM drives the charger power stage while the ADC tracks pack voltage and current; comparator inputs handle hardware overcurrent and reverse-polarity faults. At 40 MIPS, the firmware executes both the fast control loop and supervisory tasks such as temperature-based derating and fault logging within the 9 KB flash budget. The 3.3 V supply and industrial temperature range integrate cleanly into charger products derived from mains-powered front ends.
Recommended
Engineering reference data for DSPIC33FJ09GS302-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ06GS202-I/SP | DSPIC33FJ06GS202A-E/SP |
|---|---|---|---|
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 16-bit dsPIC DSC, 40 MIPS | 16-bit dsPIC DSC, 40 MIPS | 16-bit dsPIC DSC, 40 MIPS |
| Flash Memory | 9 KB | 6 KB | 6 KB |
| Data RAM | 1 KB | 1 KB | 1 KB |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Temperature Range | -40C to +85C (I) | -40C to +85C (I) | Extended (E variant) |
| SMPS Peripherals | High-Speed PWM, ADC, Comparators | High-Speed PWM, ADC, Comparators - same | High-Speed PWM, ADC, Comparators - same |
Key Differentiators
- Largest program memory in the 28-pin SPDIP GS sub-family (vs DSPIC33FJ06GS202-I/SP)
- Purpose-built SMPS peripheral set (vs DSPIC33FJ06GS202A-E/SP)
- Through-hole SPDIP package simplifies prototyping (vs DSPIC33FJ09GS302-I/MM)
Design Notes
Power the DSPIC33FJ09GS302-I/SP from a clean regulated 3.3 V rail within its 3.0 V to 3.6 V window; exceeding the maximum rating will damage the device. In SMPS products, derive this rail from an auxiliary winding through a small LDO or shunt regulator, and sequence it before the power stage if the controller must supervise startup. Decouple each VDD pin with a 0.1 uF ceramic placed within a few millimeters of the pin, plus one bulk 4.7-10 uF capacitor near the controller for charge reservoir behavior during PWM switching events.
Keep the analog domain separate from the switching domain: route ADC inputs (current-shunt and output-voltage sense lines) away from PWM traces and gate-driver loops, and use a single-point star ground connecting the controller ground to power-stage ground at the shunt resistor. On the 28-pin SPDIP through-hole footprint, short ground stubs are hard to achieve, so prioritize a solid ground plane on the opposite PCB layer with via stitching near the controller. This preserves ADC accuracy for closed-loop regulation and reduces PWM-coupled jitter.
Three frequent issues with this family: (1) firmware written for 9 KB flash will not fit the 6 KB GS202 siblings - budget code size before choosing an alternative; (2) consult the family silicon errata (DS-80540B) because some early GS-family silicon behaviors deviate from the main datasheet; (3) verify MCLR programming configuration, as incorrect MCLR/PGD/PGC pin configuration is the most common cause of in-circuit programming failures on the SPDIP package during development.
Compliance Information
Compliance status was not stated in the provided web data; verify RoHS/REACH status on the official Microchip product page before design-in.
