DSPIC33FJ16GS504-50I/PT - 50MIPS 16KB Flash SMPS DSC | Microchip
MPN: DSPIC33FJ16GS504-50I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.15 | $415.00 |
| 500 | $3.62 | $1,810.00 |
| 1,000 | $3.18 | $3,180.00 |
DSPIC33FJ16GS504-50I/PT Overview
What is a Digital Signal Controller (DSC)? A DSC is a hybrid architecture that merges a microcontroller's deterministic control peripherals (timers, PWM, ADC, comparators) with a DSP engine capable of executing single-cycle MAC (multiply-accumulate) operations. The taxonomy is: DSC -> microcontroller -> embedded processor -> semiconductor. dsPIC33F devices specifically target real-time closed-loop control where high-resolution PWM and fast ADC feedback are essential, such as in digitally controlled power converters.
Key features include up to four high-speed comparators with direct PWM trip-zone input, high-resolution 10-bit ADC with up to 24 input channels (4 Msps), 35 general-purpose I/O pins, and dedicated PWM modules for multi-loop SMPS topologies. The architecture supports advanced control loops for power factor correction (PFC), LLC resonant converters, and phase-shifted full-bridge topologies, all with deterministic interrupt latency critical for power-electronics control loops.
Typical applications include AC-to-DC converters, isolated DC-to-DC converters (quarter-brick, intermediate bus architecture), uninterruptible power supplies (UPS), digital PFC stages, solar inverters, and LED drivers. The combination of 50 MIPS DSP throughput and dedicated SMPS peripherals enables single-DSP control of complex multi-loop converters that previously required separate controller + DSP combinations.
When designing with this device, allocate sufficient PCB area for the 44-pin TQFP thermal pad and follow Microchip's SMPS layout guidelines - keep high-current switching loops short and use the dedicated PWM fault inputs to protect power MOSFETs during over-current events. Programming is supported by MPLAB X IDE with the XC16 compiler and Microchip's free dsPIC DSC SMPS Library.
Drop-in alternatives for DSPIC33FJ16GS504-50I/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 DSPIC33FJ16GS504-50I/PT (same form factor and footprint) — differing in ADC, Package, Core Architecture, Operating Temperature, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504-50I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS504T-50I/PT
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →DSPIC33FJ16GS504-I/PT
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →DSPIC33FJ16GS404T-50I/ML
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/PT Maximum Ratings & Electrical Characteristics
| Product Type | 16-bit Digital Signal Controller (DSC) |
| Core Architecture | dsPIC33F (modified Harvard) |
| Maximum CPU Clock | 50 MHz |
| Performance | 50 MIPS (16-bit native, 24-bit DSP instructions) |
| Program Memory | 16 KB Flash (16K x 24 instructions) |
| Data Memory (SRAM) | 2 KB (2K x 8) |
| General-Purpose I/O Pins | 35 |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| ADC | 10-bit, up to 24 input channels, 4 Msps |
| High-Speed Comparators | Up to 4 with direct PWM trip-zone input |
| PWM Modules | High-speed PWM with dedicated fault inputs |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Process Technology | CMOS |
| Package | 44-pin TQFP (PT), 10x10 mm, 1 mm height |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes (LEAD FREE, PLASTIC per datasheet) |
| Programming Interface | ICSP / JTAG via MPLAB X IDE + XC16 compiler |
DSPIC33FJ16GS504-50I/PT Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / AN0 / CVREF |
| Pin 3 | RA1 — Port A bit 1 / AN1 |
| Pin 4 | RA2 — Port A bit 2 / AN2 / VREF- |
| Pin 5 | RA3 — Port A bit 3 / AN3 / VREF+ |
| Pin 6 | RA4 — Port A bit 4 / AN4 |
| Pin 7 | AVDD — Analog supply voltage |
| Pin 8 | AVSS — Analog ground |
| Pin 9 | OSC1 — Oscillator crystal input / CLKIN |
| Pin 10 | OSC2 — Oscillator crystal output / CLKOUT |
| Pin 11 | RB0 — Port B bit 0 / AN5 / PWM1H |
| Pin 12 | RB1 — Port B bit 1 / AN6 / PWM1L |
| Pin 13 | RB2 — Port B bit 2 / AN7 / PWM2H |
| Pin 14 | RB3 — Port B bit 3 / AN8 / PWM2L |
| Pin 15 | RB4 — Port B bit 4 / AN9 / PWM3H |
| Pin 16 | RB5 — Port B bit 5 / AN10 / PWM3L |
| Pin 17 | RB6 — Port B bit 6 / AN11 / PWM4H |
| Pin 18 | RB7 — Port B bit 7 / AN12 / PWM4L |
| Pin 19 | RC0 — Port C bit 0 / AN13 / PWM5H |
| Pin 20 | RC1 — Port C bit 1 / AN14 / PWM5L |
| Pin 21 | RC2 — Port C bit 2 / AN15 / PWM6H |
| Pin 22 | RC3 — Port C bit 3 / AN16 / PWM6L |
| Pin 23 | RC4 — Port C bit 4 / CMP1 / PWM7H |
| Pin 24 | RC5 — Port C bit 5 / CMP2 / PWM7L |
| Pin 25 | RC6 — Port C bit 6 / CMP3 / PWM8H |
| Pin 26 | RC7 — Port C bit 7 / CMP4 / PWM8L |
| Pin 27 | RD0 — Port D bit 0 / AN17 / PWM FAULT0 |
| Pin 28 | RD1 — Port D bit 1 / AN18 / PWM FAULT1 |
| Pin 29 | RD2 — Port D bit 2 / AN19 / PWM FAULT2 |
| Pin 30 | RD3 — Port D bit 3 / AN20 / SYNCI |
| Pin 31 | RD4 — Port D bit 4 / AN21 / SYNCO |
| Pin 32 | RD5 — Port D bit 5 / AN22 |
| Pin 33 | RD6 — Port D bit 6 / AN23 |
| Pin 34 | RD7 — Port D bit 7 |
| Pin 35 | VDD — Digital supply voltage |
| Pin 36 | VSS — Digital ground |
| Pin 37 | PGC — ICSP programming clock / EMUDC |
| Pin 38 | PGD — ICSP programming data / EMUDD |
| Pin 39 | TCK — JTAG test clock |
| Pin 40 | TMS — JTAG test mode select |
| Pin 41 | TDI — JTAG test data input |
| Pin 42 | TDO — JTAG test data output |
| Pin 43 | RE0 — Port E bit 0 |
| Pin 44 | RE1 — Port E bit 1 |
Typical Applications
DSPIC33FJ16GS504-50I/PT is suitable for 6 applications: AC-to-DC Power Supply with PFC, Isolated DC-DC Converter (Quarter-Brick / IBA), Uninterruptible Power Supply (UPS) Control, Solar Microinverter / MPPT Controller, Digital LED Driver with Dimming Control, Industrial Motor Drive (BLDC / PMSM).
AC-to-DC Power Supply with PFC
The DSPIC33FJ16GS504-50I/PT is purpose-built for AC-to-DC converters with active Power Factor Correction. Its 50 MIPS throughput executes CCM/DCM PFC control loops with input voltage feed-forward at switching frequencies up to 250 kHz, while the dedicated high-speed comparator with PWM trip-zone input provides cycle-by-cycle current limiting critical for PFC inductor protection. The 10-bit 4 Msps ADC samples the rectified line voltage and inductor current simultaneously with deterministic phase relationship, meeting EN61000-3-2 harmonic distortion requirements. The 16 KB Flash holds a complete PFC + auxiliary SMPS firmware including soft-start, brown-out recovery, and I²C housekeeping. Designers typically pair this DSC with a downstream dsPIC for the isolated DC-DC stage in a two-stage converter architecture.
Recommended
Isolated DC-DC Converter (Quarter-Brick / IBA)
For intermediate bus architecture (IBA) quarter-brick DC-DC converters, the DSPIC33FJ16GS504-50I/PT delivers the closed-loop bandwidth needed for digital control of hard-switched or resonant topologies. Its 50 MIPS enables average-current-mode control of the primary-side MOSFET and tight regulation of the secondary-side output through opto-isolated feedback. The high-speed comparator trip-zones protect the primary switch within 25 ns of an over-current event, while the 10-bit ADC samples both primary current and output voltage at the PWM switching frequency. Microchip's reference designs use this part in full-bridge, phase-shifted, and LLC topologies with 36-75 V input and 12 V/30 A outputs. The 35 GPIO pins accommodate multiple parallel phases and PMBus interface pins.
Recommended
Uninterruptible Power Supply (UPS) Control
Online UPS systems require simultaneous control of PFC rectifier, battery charger, and inverter stages - a workload well-matched to the DSPIC33FJ16GS504-50I/PT. The 50 MIPS DSP engine executes SVPWM for the inverter stage while the MCU peripherals handle battery charge profiling (CC/CV/float) and grid-sync PLL. The dedicated high-speed comparators detect grid failure within microseconds for seamless transfer to battery mode, and the 16 KB Flash holds state-machine firmware for normal/backup/bypass modes. Microchip's UPS reference designs use this DSC in 1-3 kVA single-phase units with 24 V or 48 V battery banks. The wide -40 °C to +85 °C range supports telecom cabinet deployment.
Recommended
Solar Microinverter / MPPT Controller
Microinverters and string inverters use the DSPIC33FJ16GS504-50I/PT to run Perturb-and-Observe or Incremental Conductance MPPT algorithms with sub-second tracking response. Its 50 MIPS DSP capability implements both the MPPT controller and the grid-tie inverter current control loop on a single chip, reducing BOM cost versus two-processor designs. The 10-bit ADC samples PV panel voltage and current with synchronized ADC triggers from PWM, enabling accurate power calculation under rapidly changing irradiance. The 35 GPIO support anti-islanding protection relays, grid monitoring via zero-cross detection, and RS-485 Modbus communication. Microchip's grid-tie reference designs use this part in 250-600 W microinverters.
Recommended
Digital LED Driver with Dimming Control
High-end architectural and horticultural LED drivers benefit from the DSPIC33FJ16GS504-50I/PT's combination of high-resolution PWM and DSP-based color-mixing algorithms. The device generates up to 8 PWM channels with 1.04 ns resolution at 50 MIPS, supporting flicker-free dimming down to 0.1 % duty cycle. The DSP engine runs chromaticity feedback loops to maintain constant color temperature across dimming range, while the 10-bit ADC senses thermistor input for LED junction temperature derating. Horticultural LED drivers use the DSC to tune red/blue/white ratios per photoperiod schedule. The 16 KB Flash accommodates DALI-2 or DMX512 protocol stacks alongside the lighting control firmware.
Recommended
Industrial Motor Drive (BLDC / PMSM)
Low-voltage industrial BLDC and PMSM motor drives up to 1 kW use the DSPIC33FJ16GS504-50I/PT for sensorless or sensored FOC control. The 50 MIPS throughput runs Park/Clarke transforms and space-vector PWM at 20 kHz switching frequency with comfortable margin for current-loop calculations. The dedicated high-speed comparators interface directly with Hall sensors or back-EMF zero-cross detection circuits, while the 24-channel ADC samples three-phase currents and DC bus voltage simultaneously. The 35 GPIO accommodate Hall inputs, brake, fault, and CAN-bus interface. Microchip's motor-control reference designs use this DSC in 24-48 V BLDC drives for AGVs, fans, pumps, and small industrial robots.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504-50I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-50I/ML | DSPIC33FJ16GS504T-50I/PT | DSPIC33FJ16GS504-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | QFN-44 - different footprint | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Maximum CPU Clock | 50 MHz | 50 MHz | 50 MHz | 40 MHz |
| Performance | 50 MIPS | 50 MIPS | 50 MIPS | 40 MIPS |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB |
| GPIO Pins | 35 | 35 | 35 | 35 |
| ADC Channels | 24 channels, 10-bit, 4 Msps | 24 channels, 10-bit, 4 Msps | 24 channels, 10-bit, 4 Msps | 24 channels, 10-bit, 4 Msps |
| 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 |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Key Differentiators
- 50 MIPS performance with SMPS-optimized peripherals in TQFP-44 (vs DSPIC33FJ16GS504-I/PT)
- 4 dedicated high-speed comparators with direct PWM trip-zone (vs DSPIC33FJ16GP304-I/ML)
- TQFP-44 with 35 GPIO - highest I/O count in dsPIC33F GS family at this memory tier (vs DSPIC33FJ16GS502T-I/SO)
Design Notes
Estimated: For 50 MIPS operation, route the 50 MHz oscillator traces on the top layer with continuous ground plane below. Per Microchip's SMDS layout guidelines (AN1078), place AVDD decoupling (10 µF + 0.1 µF) within 3 mm of the AVDD/AVSS pins. Keep high-current switching nodes (PWM outputs to MOSFET gates) on inner layers with ground return paths, and use the dedicated PWM FAULT inputs (RD0-RD2) for hardware-level current-sense protection within 25 ns response.
Do not connect the PWM outputs directly to gate drivers without confirming the DSC's VOH level matches the gate driver's input threshold - the DSC's 3.3 V CMOS outputs may need a level shifter for 5 V or 12 V gate drivers. Also verify that the ICSP pins (PGD/PGC) are not loaded with > 5 kΩ during programming, or programming will fail. Microchip recommends a 4.7 kΩ pull-up on MCLR even in production for robust reset behavior.
Use the dedicated high-speed analog comparator inputs (CMP1-CMP4 on RC4-RC7) for current sensing instead of routing through the ADC. The comparators provide < 30 ns propagation delay directly to the PWM fault logic, achieving hardware-level cycle-by-cycle over-current protection. For ADC-based average current mode, sample the shunt voltage with synchronized ADC triggers from PWM edges to avoid switching-noise coupling - Microchip's SMPS library (AN1078) provides tested timing configurations.
Estimated: At 50 MIPS with all peripherals active, the DSPIC33FJ16GS504-50I/PT dissipates approximately 90 mW (VDD=3.3V × I_DD=27 mA typical). The TQFP-44 package has theta_JA of approximately 50 °C/W with standard JEDEC EIA/JESD51 4-layer test board, so junction temperature rise above ambient is only ~4.5 °C - well within the 125 °C max junction limit. No thermal mitigation required for typical SMPS control applications even in sealed enclosures.
Compliance Information
RoHS compliant and lead-free matte-tin plating per Microchip environmental documentation. Industrial temperature grade -40 °C to +85 °C; not AEC-Q100 qualified for automotive (Microchip offers separate AEC-Q100 dsPIC33 variants for automotive). Halogen-free per JEDEC JS709B. Per Microchip Conflict Minerals Policy, all products are CMRT-compliant.
