DSPIC33FJ32GS406-E/PT - 16-Bit 40MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33FJ32GS406-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.68 | $66.80 |
| 100 | $5.95 | $595.00 |
| 500 | $5.36 | $2,680.00 |
| 1,000 | $4.82 | $4,820.00 |
DSPIC33FJ32GS406-E/PT Overview
A digital signal controller combines the computational power of a DSP core with the peripheral integration and control architecture of a microcontroller. Within the power-management semiconductor hierarchy, the dsPIC33F family sits in the digital signal controller category under microcontrollers, targeting closed-loop control of switching power electronics. The modified Harvard 16-bit architecture with an enhanced DSP instruction set enables fast PID loops and mathematical processing required in digital power conversion.
Key features of this device include a 16-bit modified Harvard CPU running at 40 MIPS, 4-channel DMA for low-overhead data movement, 8 timers, and the SMPS-oriented peripheral set that defines the GS subfamily: high-speed PWM modules with advanced deadlock protection, high-speed ADCs for simultaneous current sampling, and up to four high-speed comparators with direct connection to the PWM fault inputs for cycle-by-cycle current limiting.
Technical depth: the dsPIC33FJ32GS406 uses CMOS process technology with DSP engine support for multiply-accumulate operations, making it well suited to average current-mode control and predictive control algorithms. Per the digchip datasheet summary, the supply voltage range is 3.0V to 3.6V, with 35 I/O available on the 64-TQFP package. The peripheral architecture is specifically optimized for multi-loop digital switch-mode power supplies, where deterministic interrupt latency and ADC-to-PWM trigger synchronization determine loop stability.
Typical applications include AC-to-DC converters, DC-to-DC converters, power factor correction (PFC) stages, and uninterruptible power supplies (UPS), all explicitly listed by Microchip for the dsPIC33FJ32GS406 family.
Design consideration: the 3.0V to 3.6V supply window requires a clean 3.3V rail; ensure all VDD/VSS pairs are decoupled and that PGECx/PGEDx pairs are kept as matched pairs for in-circuit serial programming.
This page synthesizes distributor pricing context, drop-in family alternatives, and practical digital-power design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32GS406-E/PT — 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 DSPIC33FJ32GS406-E/PT (same form factor and footprint) — differing in Core Architecture, Package, Timers, DMA Channels, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GS406-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.85 / Unit
View Datasheet →DSPIC33FJ32GS606-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS606-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.41 / Unit
View Datasheet →DSPIC33FJ32GS406-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit modified Harvard, DSP-enhanced |
| Maximum Clock Frequency | 40 MHz |
| Performance | 40 MIPS |
| Program Memory | 32 KB Flash |
| RAM | 4 KB |
| DMA Channels | 4 |
| Timers | 8 |
| I/O Ports | 35 |
| Supply Voltage | 3.0 V to 3.6 V |
| High-Speed Comparators | Up to 4 (direct PWM fault connection) |
| Package | 64-TQFP, 10 x 10 mm, 1 mm height |
| Terminal Form | Gull wing |
| Package Code | TFQFP, square |
| Mounting Type | Surface Mount |
| Process Technology | CMOS |
| Lead Free | Yes |
| Programming Interface | ICSP via PGECx/PGEDx pairs (multiple pairs) |
| Lifecycle Stage | ACTIVE |
DSPIC33FJ32GS406-E/PT tfqfp, square Pin Configuration Guide
Pin configuration for DSPIC33FJ32GS406-E/PT (tfqfp, square 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 DSPIC33FJ32GS406-E/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32GS406-E/PT is suitable for 6 applications: AC-DC Converter Digital Control, Power Factor Correction (PFC), DC-DC Converter Control, Uninterruptible Power Supplies (UPS), Digital Lighting and LED Driver Power, Solar Micro-Inverter and Renewable Power Conversion.
AC-DC Converter Digital Control
The DSPIC33FJ32GS406-E/PT fits AC-to-DC converter control because Microchip explicitly designed the GS-series peripheral set for it: the high-speed PWM generates switching waveforms with programmable dead time, the high-speed ADC samples output voltage and inductor current synchronized to PWM triggers, and the on-chip comparators provide hardware cycle-by-cycle overcurrent shutdown with no CPU latency. The 40 MIPS core executes inner current and outer voltage loops fast enough for 100 kHz-class converters. A typical topology places the DSC between the feedback divider and the PWM gate drivers, replacing analog control ICs entirely and enabling firmware-defined transient response, soft-start, and fault handling. The 3.0V to 3.6V supply and 64-TQFP 10x10 mm footprint integrate cleanly into compact power supply PCBs.
Recommended
Power Factor Correction (PFC)
Power factor correction demands fast, deterministic current-loop control, which is exactly what this device delivers. According to Microchip, the dsPIC33FJ32GS406 family supports multi-loop digital SMPS including PFC, and the vendor provides a 350W interleaved PFC reference design with universal input based on this family. In a boost-PFC stage, the high-speed ADC samples input rectified voltage and inductor current at the start of each PWM period; the 40 MIPS DSP core computes the duty update using PI or predictive control within the same cycle. The four high-speed comparators connect directly to PWM fault inputs for instantaneous overcurrent protection. The 4 DMA channels offload ADC results from the CPU, keeping interrupt latency minimal and loop bandwidth high.
Recommended
DC-DC Converter Control
For DC-to-DC converter control - buck, boost, or LLC topologies - the DSPIC33FJ32GS406-E/PT provides the tight ADC-to-PWM synchronization that loop stability requires. The GS-series high-speed PWM module can trigger ADC sampling at precise points in the switching cycle, eliminating switching-noise corruption of current measurements. The DSP-enhanced instruction set performs multiply-accumulate operations for PID and average-current-mode control efficiently at 40 MIPS. Firmware-defined control enables nonlinear gains, mode hopping between CCM and DCM, and adaptive dead-time optimization that analog controllers cannot match. The 35 I/O on the 64-TQFP leaves headroom for housekeeping functions: fan control, telemetry via UART, and fault logging, consolidating controller and supervisor into one device.
Recommended
Uninterruptible Power Supplies (UPS)
UPS systems combine a PFC front end, a DC-DC battery converter, and an inverter output stage - three control loops the dsPIC33FJ32GS406-E/PT can supervise simultaneously. Microchip lists UPS as a target application for this family. The 8 timers and 4 DMA channels coordinate interleaved switching stages, while the high-speed comparators provide per-stage overcurrent protection. The 32KB Flash accommodates the state machine governing line/battery/inverter mode transitions, battery charging profiles, and transfer synchronization. Extended E-temperature grading supports operation in hot equipment enclosures typical of UPS installations. The 4KB RAM buffers waveform samples for power-quality metering, allowing the same DSC to report input/output voltage, frequency, and load percentage over a serial link.
Recommended
Digital Lighting and LED Driver Power
High-power LED drivers benefit from the same digital power control loop as any SMPS: constant-current regulation with fast transient response and dimming control. The high-speed PWM of the DSPIC33FJ32GS406-E/PT generates both the switching waveform and the PWM dimming signal with programmable resolution, while the high-speed ADC closes the current loop each cycle. Digital control enables DALI or PWM-dimmable interfaces, thermal foldback curves implemented in firmware, and adaptive efficiency optimization across load ranges - features analog LED controller ICs handle poorly. The extended E temperature grade suits enclosed luminaire drivers. With 35 I/O, a single 64-TQFP device can drive multi-string luminaires and report diagnostics on UART or SMBus to the lighting management system.
Recommended
Solar Micro-Inverter and Renewable Power Conversion
Grid-tied renewable converters stack MPPT, DC-link regulation, and grid-current shaping - a multi-loop problem the DSPIC33FJ32GS406-E/PT handles with its synchronized ADC/PWM subsystem and 40 MIPS core. MPPT algorithms run as a slow outer loop on the DSP core while the inner grid-current loop executes per PWM cycle; the high-speed comparators protect against grid faults and overcurrent without CPU involvement. Firmware-based control supports anti-islanding detection and grid-code-specific waveform shaping that would otherwise need a second processor. Although Microchip targets this family primarily at SMPS and UPS, the peripheral set maps directly onto micro-inverter control. For designs needing more code space for grid standards, the pin-compatible 64GS406 doubles Flash with no PCB change.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GS406-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GS406-I/PT | DSPIC33FJ64GS406-E/PT | DSPIC33FJ64GS406-I/PT | DSPIC33FJ32GS606-I/PT | DSPIC33FJ64GS606-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm, PT) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Performance | 16-bit, 40 MHz / 40 MIPS | 16-bit, 40 MIPS | 16-bit, 40 MIPS | 16-bit, 40 MIPS | 16-bit, 40 MIPS | 16-bit, 40 MIPS |
| Flash Program Memory | 32 KB | 32 KB | 64 KB (+100%) | 64 KB (+100%) | 32 KB | 64 KB (+100%) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Temperature Grade | E (extended) | I (industrial) | E (extended) | I (industrial) | I (industrial) | I (industrial) |
| SMPS Peripherals (PWM/ADC/Comparators) | GS-series high-speed set | GS-series - identical | GS-series - identical | GS-series - identical | GS606 - expanded set | GS606 - expanded set |
Key Differentiators
- Extended temperature grade in the 64-TQFP GS footprint (vs DSPIC33FJ32GS406-I/PT)
- Memory upgrade without PCB change (vs DSPIC33FJ64GS406-E/PT)
- SMPS-specific peripheral integration (vs DSPIC33FJ32GS606-I/PT)
Design Notes
Supply the DSPIC33FJ32GS406-E/PT from a regulated 3.3V rail within the 3.0V to 3.6V datasheet window. In digital power designs the DSC often shares a PCB with noisy switching stages - use a dedicated low-dropout regulator or ferrite-isolated branch from the bias rail, and decouple every VDD/VSS pin pair with 0.1uF ceramics placed within 2 mm of the pins, plus one bulk 10uF near the package. Per the northernsoftware dsPIC33FJ32GS406 notes, all VDD and VSS pins must be connected; never leave a power pair floating.
The ICSP programming interface has multiple PGECx/PGEDx pairs - you may use any pair, but ICSPCLK and ICSPDAT must come from the same numbered pair (PGEC2 with PGED2, for example). Route the chosen pair to a standard 5-pin ICSP header on the power-supply PCB and keep the traces short and away from switch nodes to prevent programming faults from dv/dt coupling. Reserve the header even on production boards; in-system firmware updates on digital power hardware strongly depend on it.
When migrating firmware between same-footprint family members (32GS406 to 64GS406, or to GS606 variants), do not assume identical peripheral counts - the GS606 subfamily adds peripherals and the memory map shifts with Flash size. Re-link against the correct device support files and re-verify PWM/ADC register maps. Also note the -E/PT and -I/PT grades differ in temperature rating: substituting an I-grade part into an E-grade thermal environment violates the datasheet operating range even though the package and pinout are identical.
In digital SMPS layouts, keep the high-speed ADC input traces (current-sense and voltage-feedback signals) away from PWM gate-drive and switch-node traces; the GS-series ADC samples synchronized to PWM precisely so that sampling occurs during a quiet window of the switching cycle. Add a small RC filter (e.g., 100 ohm / 1 nF, tuned per sampling window) on current-sense inputs to reject residual switching spikes without corrupting the loop bandwidth.
Compliance Information
Package described as 'LEAD FREE, PLASTIC' in digchip datasheet summary; RoHS compliance per distributor listings. REACH, halogen-free, and conflict-minerals status not stated in retrieved data - confirm via Microchip environmental documentation.
