DSPIC33FJ64GS406T-50I/PT - 16-bit DSC 50 MIPS SMPS PWM | Microchip
MPN: DSPIC33FJ64GS406T-50I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.21 | $62.10 |
| 100 | $5.52 | $552.00 |
| 500 | $4.97 | $2,485.00 |
| 1,000 | $4.45 | $4,450.00 |
DSPIC33FJ64GS406T-50I/PT Overview
A digital signal controller combines the computational throughput of a DSP core with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits above a general-purpose MCU as the control element of digital power conversion systems, replacing analog control loops with firmware-executed proportional-integral compensators running at switching frequencies of hundreds of kilohertz.
Key features of this SMPS-focused family member include dedicated high-speed PWM modules with complementary outputs, dead-time control and fault protection, a high-speed 10-bit ADC with multiple sample-and-hold circuits able to sample multiple channels simultaneously, analog comparators, and a quadrature encoder interface (QEI) for motor feedback. The 50 MIPS core throughput allows single- or multi-loop digital power control with deterministic loop timing.
Architecturally, the dsPIC33F core uses a modified Harvard pipeline with DSP multiply-accumulate instructions, enabling fast execution of control-law and filter calculations. Programming is via ICSP using tools such as the PICkit or ICD families, and the same family software libraries (SMPS firmware frameworks) carry across pin-compatible GS-series variants, reducing migration risk.
Typical applications include AC-DC converters, DC-DC converters, power factor correction (PFC) stages, uninterruptible power supplies, and digital lighting or battery chargers, where the SMPS PWM and ADC combination replaces dedicated analog controllers. The QEI also suits digital motor control.
For design, use Microchip's interleaved PFC reference design as a proven starting point, and verify PWM dead-time and ADC trigger timing against your switching frequency.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64GS406T-50I/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 DSPIC33FJ64GS406T-50I/PT (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64GS406-50I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406T-50E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS406-50I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GP708A-I/PT
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →DSPIC33FJ64GP206T-I/PT
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →DSPIC33FJ64GS406T-50I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F, 16-bit |
| Maximum CPU Speed | 50 MIPS (50 MHz) |
| Flash Memory | 64KB (64K x 8) |
| RAM | 8KB |
| Supply Voltage | 3.3 V |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Specialized Peripherals | SMPS PWM, QEI |
| PWM Modules | High-speed SMPS PWM with complementary outputs |
| ADC | High-speed 10-bit ADC |
| Analog Comparators | Yes |
| Quadrature Encoder Interface | Yes |
| Programmable Via | ICSP (PICkit / ICD tools) |
| Product Series | dsPIC33FJ64GS406 (SMPS DSC family) |
| Packaging Variant | Tape and Reel (T suffix) |
| RoHS Status | Compliant |
DSPIC33FJ64GS406T-50I/PT 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ64GS406T-50I/PT (64-tqfp (10x10 mm) 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 DSPIC33FJ64GS406T-50I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ64GS406T-50I/PT is suitable for 6 applications: AC-DC Power Conversion, Power Factor Correction (PFC), DC-DC Converters, Uninterruptible Power Supplies (UPS), Digital Motor Control, Battery Chargers.
AC-DC Power Conversion
The DSPIC33FJ64GS406T-50I/PT is purpose-built for digitally controlled AC-DC converters, where its dedicated high-speed SMPS PWM modules generate complementary outputs with programmable dead-time and cycle-by-cycle fault protection. The high-speed 10-bit ADC can sample input voltage, input current, and output voltage within one switching period, enabling firmware-executed voltage and current control loops at 50 MIPS. Running the controller between the bridge rectifier and the DC output replaces analog error amplifiers with a deterministic digital compensator, improving transient response, line regulation, and programmability across product variants. Microchip specifically lists AC to DC converters as a target application for the GS family in its product documentation.
Recommended
Power Factor Correction (PFC)
Power factor correction demands fast inner current-shaping loops synchronized to the rectified line, exactly the workload the DSPIC33FJ64GS406T-50I/PT targets. Its SMPS PWM modules support multiple interleaved phases with independent duty control, and the fast 10-bit ADC can trigger conversions precisely at the PWM period boundary to sample average inductor current. Microchip provides an interleaved PFC reference design based on this device family that operates from universal AC input and delivers up to 350W of high-voltage DC output, providing proven firmware as a starting point. At 50 MIPS, both the current loop and outer voltage loop run comfortably within a single switching cycle, meeting harmonic limits such as IEC-style PFC requirements while remaining fully firmware-adjustable.
Recommended
DC-DC Converters
For digitally controlled DC-DC converters - including synchronous buck, boost, and multiphase topologies - the DSPIC33FJ64GS406T-50I/PT integrates everything the control loop needs on one chip. The high-speed PWM outputs drive gate drivers directly with sub-nanosecond-resolution duty updates and complementary operation with dead-time, while the fast 10-bit ADC plus analog comparators provide both average-mode sampling and cycle-by-cycle overcurrent protection. The 50 MIPS dsPIC33F core executes the compensator with DSP multiply-accumulate instructions, leaving headroom for housekeeping tasks such as telemetry, PMBus-style commands, and nonlinear limiting. Because loop gains are firmware constants, one hardware design can serve multiple output voltage products, cutting bill-of-materials variants across a converter family.
Recommended
Uninterruptible Power Supplies (UPS)
Online UPS systems combine an AC-DC rectifier/PFC stage, a DC-DC battery converter, and a DC-AC inverter - three control loops the DSPIC33FJ64GS406T-50I/PT can coordinate on a single controller. Its multi-channel high-speed PWM supports phase-shifted and complementary gate patterns for the inverter bridge and battery converter, while the fast 10-bit ADC samples AC output voltage and current, battery voltage, and DC bus simultaneously. The 64KB Flash accommodates the complete control firmware plus grid-monitoring and transfer logic, and the 50 MIPS throughput keeps multi-loop control deterministic. Microchip explicitly lists uninterruptible power supplies among the GS family's target digital power-conversion applications, and reference firmware exists for the inverter control tasks.
Recommended
Digital Motor Control
Motor drives benefit from the DSPIC33FJ64GS406T-50I/PT's combination of SMPS-grade PWM and the quadrature encoder interface (QEI). The QEI decodes incremental encoder feedback in hardware, freeing the 50 MIPS dsPIC33F core to run field-oriented or trapezoidal control algorithms using DSP multiply-accumulate instructions. The high-speed PWM modules produce complementary outputs with dead-time for the three-phase inverter, and the fast 10-bit ADC plus analog comparators implement overcurrent protection without CPU intervention. Typical targets include servo drives, industrial fans, pumps, and compressors where digital control improves efficiency and enables field firmware updates. The Industrial temperature rating of -40C to +85C suits factory-floor environments without component derating at typical cabinet temperatures.
Recommended
Battery Chargers
Smart battery chargers require precisely profiled charging curves - constant current, constant voltage, and termination logic - all of which are naturally implemented in firmware on the DSPIC33FJ64GS406T-50I/PT. The high-speed PWM controls the power stage (buck, boost, or LLC driver stage) with dead-time protection, while the fast 10-bit ADC samples charge current, pack voltage, and temperature on a per-cycle basis. Analog comparators provide hardware overcurrent fault shutdown independent of software, a safety requirement in charging applications. The 64KB Flash holds multiple charge profiles for different chemistries selectable at runtime, and the 50 MIPS core leaves headroom for communication interfaces such as SMBus-style battery protocol handling, making one controller serve the entire charging product line.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64GS406T-50I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64GS406-50I/PT | DSPIC33FJ64GS406T-50E/PT | DSPIC33FJ32GS406-50I/PT | DSPIC33FJ64GP708A-I/PT |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 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 |
| Core / Performance | dsPIC33F 16-bit, 50 MIPS | dsPIC33F 16-bit, 50 MIPS | dsPIC33F 16-bit, 50 MIPS | dsPIC33F 16-bit, 50 MIPS | dsPIC33F 16-bit, 50 MIPS |
| Flash Memory | 64KB (64K x 8) | 64KB | 64KB | 32KB | 64KB |
| RAM | 8KB | 8KB | 8KB | 8KB | 8KB |
| SMPS High-Speed PWM | Yes | Yes | Yes | Yes | No (GP family) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Dedicated SMPS high-speed PWM peripheral set (vs DSPIC33FJ64GP708A-I/PT)
- Double the Flash at the same cost class within the family (vs DSPIC33FJ32GS406-50I/PT)
- Temperature flexibility with footprint-compatible upgrade path (vs DSPIC33FJ64GS406T-50E/PT)
Design Notes
For the 64-TQFP (10x10 mm) package, place 0.1uF ceramic decoupling capacitors at every VDD pin pair as close to the pins as possible, and decouple AVDD separately with an RC filter from VDD to keep switching noise out of the 10-bit ADC reference path. Microchip's SMPS family datasheet electrical connection diagrams specify the required power/ground pairs; ground the exposed paddle strategy with a solid internal ground plane. Connect all VSS pins to the plane with multiple vias to minimize PWM ground bounce during high di/dt gate-drive events.
Do not assume the GP-family dsPIC33FJ64GP708A-I/PT is functionally interchangeable: although it shares the 64-TQFP footprint and core, it lacks the SMPS high-speed PWM modules required for digital power loops. Also distinguish the 'T' (tape and reel) from non-T (tube) suffix only at the purchasing stage - they are the same silicon. Verify the dead-time and fault-control settings of the SMPS PWM against your gate driver propagation delays; cycle-by-cycle current limiting set too slow can allow hard switching faults in bridge topologies.
Start digital power designs from Microchip's interleaved PFC reference design for the GS family, which operates over universal AC input up to 350W output and provides proven ADC trigger timing and PWM phase management. Route ADC sense lines away from PWM gate traces, and use synchronous ADC sampling triggered by the PWM module rather than free-running sampling to reject switching ripple in current feedback. Keep the analog ground island under the AVDD/AN pins tied to the main ground at a single point.
At 50 MIPS with fast PWM edges, series termination resistors (10-33 ohm) on PWM outputs reduce ringing on long traces to gate drivers and cut radiated EMI. The high-speed 10-bit ADC benefits from a quiet, filtered reference; Estimated: with a 20 kHz switching frequency and 50 MIPS core, a full control loop with proportional-integral compensation plus ADC overhead consumes well under half of the CPU budget, leaving margin for telemetry - plan your loop execution budget against measured instruction cycles in MPLAB X rather than assuming worst case.
Compliance Information
RoHS compliance indicated in distributor datasheet indexes (digchip). AEC-Q100 qualification is not indicated for this industrial-grade (I suffix) part; Microchip offers automotive-qualified variants separately.
