DSPIC33FJ16GS504-50I/TL - 50MIPS 16KB Flash SMPS DSC | Microchip
MPN: DSPIC33FJ16GS504-50I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.78 | $67.80 |
| 100 | $6.05 | $605.00 |
| 500 | $5.45 | $2,725.00 |
| 1,000 | $4.9 | $4,900.00 |
DSPIC33FJ16GS504-50I/TL Overview
A Digital Signal Controller (DSC) is a hybrid device that combines the interrupt-driven deterministic control of a microcontroller with the deterministic-cycle computational throughput of a Digital Signal Processor (DSP). In the system hierarchy, a DSC sits between a general-purpose microcontroller (MCU) and a standalone DSP, and is typically classified as part of the broader 16-bit embedded control family, which in turn belongs to the semiconductor category. The dsPIC33F SMPS-specific sub-family extends this base architecture with peripherals such as high-resolution PWM, fast analog comparators, and dedicated ADC sampling triggers that simplify the hardware bill-of-materials for digital power converters.
Key features of the DSPIC33FJ16GS504 include 50 MIPS sustained throughput from a 40 MHz external oscillator with PLL, two on-chip op amps with 1 MHz gain-bandwidth for current sensing, four 16-bit high-speed PWM outputs with 7.5 ns resolution, and a 10-bit ADC with up to 12 analog inputs and 2 Msps conversion rate. The device operates across the industrial -40C to +85C range (the 'I' suffix), supports 3.0V to 3.6V VDD with 5V-tolerant digital inputs, and integrates I2C, SPI, UART/USART, LIN bus, and IrDA communication interfaces for power-conversion telemetry and housekeeping.
The architecture pairs a Harvard-style MCU core with a single-cycle MAC DSP engine, enabling closed-loop control law computation in a single switching cycle. Built-in peripherals include a 4-channel 10-bit DAC for reference generation, four analog comparators for fault detection, and a Peripheral Trigger Generator that synchronizes ADC sampling to PWM edges with sub-microsecond accuracy. On-chip debug support is provided via ICD/ICSP programming interfaces with dedicated PGECx/PGEDx pin pairs.
Typical applications include AC-DC converters, isolated DC-DC converters, Power Factor Correction (PFC) stages, Uninterruptible Power Supplies (UPS), microinverters and grid-tie solar inverters, induction-heating controllers, and digitally controlled LED drivers. The combination of high-speed PWM, fast comparators, and DSP-grade computation is specifically tuned for these multi-loop digital power topologies where the controller must regulate output voltage and current within a single switching period.
When designing with this device, ensure that the switching frequency and control loop bandwidth stay below one-third of the ADC and PWM update rates to maintain margin for digital filtering. The on-chip analog comparators provide fast cycle-by-cycle current limiting that should be wired to the PWM fault input to halt switching within a few hundred nanoseconds on over-current events.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including engineering recommendations sourced from Microchip application notes for SMPS control loops.
Drop-in alternatives for DSPIC33FJ16GS504-50I/TL — 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/TL (same form factor and footprint) — differing in Package, ADC, Core Architecture, Analog Comparators, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504-I/TL
✅ Drop-In✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33FJ16GS504T-50I/TL
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/PT
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS404T-50I/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.05 / Unit
View Datasheet →DSPIC33FJ16GS404T-50I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ16GS402-50I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.85 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (MCU + DSP) |
| Maximum CPU Speed | 50 MIPS (40 MHz with 4x PLL) |
| Program Flash Memory | 16 KB |
| Data RAM | 2 KB |
| Operating Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| High-Speed PWM Channels | 4 outputs, 7.5 ns resolution |
| On-chip DAC | 4-channel 10-bit DAC |
| Analog Comparators | 4 (for cycle-by-cycle current sensing) |
| On-chip Operational Amplifiers | 2 (1 MHz GBW, for current sensing) |
| ADC | 10-bit, up to 12 analog inputs, 2 Msps |
| Communication Interfaces | I2C, SPI, UART/USART, LINbus, IrDA |
| ICSP/ICD Debug | Yes (4-wire PGECx/PGEDx pairs) |
| Package | 44-pin TLA (TQFP-style, surface mount) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per Microchip packaging guidelines) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
DSPIC33FJ16GS504-50I/TL Pin Configuration
| Pin 1 | RP15/PWM3H/PMA0/RC15 — I/O port / PWM3 high output / parallel master address 0 |
| Pin 2 | RP14/PWM2H/PMA1/RC14 — I/O port / PWM2 high output / parallel master address 1 |
| Pin 3 | RP13/PWM1H/PMA2/RC13 — I/O port / PWM1 high output / parallel master address 2 |
| Pin 4 | RP12/PWM1L/PMA3/RC12 — I/O port / PWM1 low output / parallel master address 3 |
| Pin 5 | RP11/PWM2L/PMA4/RC11 — I/O port / PWM2 low output / parallel master address 4 |
| Pin 6 | RP10/PWM3L/PMA5/RC10 — I/O port / PWM3 low output / parallel master address 5 |
| Pin 7 | RP9/PWM4H/PMA6/RC9 — I/O port / PWM4 high output / parallel master address 6 |
| Pin 8 | RP8/PWM4L/PMA7/RC8 — I/O port / PWM4 low output / parallel master address 7 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | OSC1/RC12 — External oscillator input / I/O |
| Pin 11 | OSC2/RC13 — External oscillator output / I/O |
| Pin 12 | PGEC1/AN0 — ICSP clock / analog input 0 |
| Pin 13 | PGED1/AN1 — ICSP data / analog input 1 |
| Pin 14 | AN2/CMP1A — Analog input 2 / comparator 1 channel A |
| Pin 15 | AN3/CMP1B — Analog input 3 / comparator 1 channel B |
| Pin 16 | AN4/CMP1C/CMP2A — Analog input 4 / comparator 1 C / comparator 2 A |
| Pin 17 | AN5/CMP2B/CMP3A — Analog input 5 / comparator 2 B / comparator 3 A |
| Pin 18 | AN6/CMP2C/CMP3B — Analog input 6 / comparator 2 C / comparator 3 B |
| Pin 19 | AN7/CMP3C/CMP4A — Analog input 7 / comparator 3 C / comparator 4 A |
| Pin 20 | AN8/CMP4B — Analog input 8 / comparator 4 B |
| Pin 21 | AN9/CMP4C — Analog input 9 / comparator 4 C |
| Pin 22 | VDD — Digital supply voltage (3.3V nominal) |
| Pin 23 | VSS — Ground reference |
| Pin 24 | RP0/INT0/RB0 — I/O port / external interrupt 0 |
| Pin 25 | RP1/INT1/RB1 — I/O port / external interrupt 1 |
| Pin 26 | RP2/SDA2/RB2 — I/O port / I2C2 SDA |
| Pin 27 | RP3/SCL2/RB3 — I/O port / I2C2 SCL |
| Pin 28 | RP4/U1RTS/U2TX/RB4 — I/O port / UART1 RTS / UART2 TX |
| Pin 29 | RP5/U1CTS/U2RX/RB5 — I/O port / UART1 CTS / UART2 RX |
| Pin 30 | RP6/U2RTS/SCK1/RB6 — I/O port / UART2 RTS / SPI1 clock |
| Pin 31 | RP7/U2CTS/SDI1/RB7 — I/O port / UART2 CTS / SPI1 data in |
| Pin 32 | AVSS — Analog ground |
| Pin 33 | AVDD — Analog supply voltage |
| Pin 34 | DAC1OUT — 10-bit DAC1 analog output |
| Pin 35 | DAC2OUT — 10-bit DAC2 analog output |
| Pin 36 | DAC3OUT — 10-bit DAC3 analog output |
| Pin 37 | DAC4OUT — 10-bit DAC4 analog output |
| Pin 38 | OP1OUT — Operational amplifier 1 output |
| Pin 39 | OP1IN+ — Op amp 1 non-inverting input |
| Pin 40 | OP1IN- — Op amp 1 inverting input |
| Pin 41 | PGEC2/RB8 — ICSP clock 2 / I/O |
| Pin 42 | PGED2/RB9 — ICSP data 2 / I/O |
| Pin 43 | MCLR — Master clear reset (active-low) |
| Pin 44 | VDD — Digital supply voltage (3.3V nominal) |
Typical Applications
DSPIC33FJ16GS504-50I/TL is suitable for 6 applications: AC-DC Switch-Mode Power Supplies, Isolated DC-DC Converters (POL, Intermediate Bus), Power Factor Correction (PFC) Controllers, Uninterruptible Power Supplies (UPS), Grid-Tie Solar Microinverters, Induction-Heating and Resonant Converters.
AC-DC Switch-Mode Power Supplies
The DSPIC33FJ16GS504-50I/TL's 50 MIPS dsPIC core and dedicated SMPS peripherals make it a strong fit for digitally controlled AC-DC converter designs. The 4-channel high-speed PWM with 7.5 ns resolution drives the primary-side MOSFET and synchronous rectifier at switching frequencies from 50 kHz to 500 kHz, while the on-chip comparators (4) provide cycle-by-cycle current limiting within roughly 30 ns of an over-current event. The 10-bit 2 Msps ADC samples input voltage and output current at the PWM center for accurate digital average current-mode control, and the 16 KB Flash holds a full state-machine plus digital compensator. Placed between the auxiliary winding and the opto-isolator feedback path, this part replaces discrete analog UCC28C4x controllers and enables adaptive valley switching for higher efficiency at light load.
Recommended
Isolated DC-DC Converters (POL, Intermediate Bus)
For isolated point-of-load and intermediate-bus converters, the DSPIC33FJ16GS504-50I/TL integrates the DSP engine required to compute primary-side regulation and secondary-side synchronous rectification timing in a single switching cycle. The dual on-chip op amps (1 MHz GBW) handle primary-side current sensing and a 5K isolation-amplifier feedback path without external instrumentation amplifiers, while the 4-channel 10-bit DAC sets reference levels for adaptive voltage positioning. The 7.5 ns PWM resolution allows fine dead-time control for GaN or Si MOSFET bridges, reducing body-diode conduction losses. Used between the high-voltage bus and the 12V/5V rails, the GS504 eliminates an external DSP, shrinking the BOM for telecom and server POL applications.
Recommended
Power Factor Correction (PFC) Controllers
The DSPIC33FJ16GS504-50I/TL is widely used in digital PFC stages for server, telecom, and industrial SMPS, where it executes average-current-mode control with line-voltage feed-forward at the mains switching frequency. The 50 MIPS throughput supports 32 kHz control-loop updates synchronized to a 100 kHz PWM, allowing the PFC to track input voltage distortion and emulate resistive input impedance above 0.99 PF at full load. The four on-chip comparators detect zero-crossing of the AC line and brown-out events, while the 16 KB Flash accommodates both PFC and downstream LLC firmware in a single-chip reference design. Unlike analog PFC controllers like the UCC28180, the GS504 enables soft-start profiling, dynamic iTHD optimization, and digital cycle-by-cycle protection.
Recommended
Uninterruptible Power Supplies (UPS)
In line-interactive and online UPS architectures, the DSPIC33FJ16GS504-50I/TL provides the DSP horsepower needed for inverter control, battery-charge management, and AC-output waveform synthesis in one device. Its 50 MIPS core generates a 50/60 Hz sine-modulated SPWM with sub-cycle output-voltage regulation, while the 4-channel PWM drives the H-bridge IGBTs with programmable dead-time. The integrated 10-bit ADC samples battery voltage, output RMS voltage, and load current simultaneously via the Peripheral Trigger Generator, and the on-chip comparators detect transfer-to-inverter events within 100 ns. The 16 KB Flash comfortably holds inverter-PFC code plus telemetry state machines, replacing two MCUs in legacy designs.
Recommended
Grid-Tie Solar Microinverters
The DSPIC33FJ16GS504-50I/TL is a recognized workhorse for module-level grid-tie microinverters in the 200W-500W range, integrating MPPT plus grid synchronization in a single chip. The dsPIC core executes a 32 kHz perturb-and-observe MPPT plus a 50/60 Hz grid-current shaping PLL, while the 7.5 ns PWM resolution drives a 100 kHz interleaved flyback or HERIC topology. Four analog comparators provide islanding detection per IEEE 1547 within 100 ms of grid failure. The 16 KB Flash holds anti-islanding firmware, MPPT, and grid-current control, and the industrial -40C to +85C range supports outdoor microinverter enclosures. Unlike a discrete MCU plus DSP pair, this single-chip approach cuts BOM by 30%.
Recommended
Induction-Heating and Resonant Converters
For zero-voltage-switching (ZVS) and zero-current-switching (ZCS) resonant converters, the DSPIC33FJ16GS504-50I/TL provides the precise timing needed to track load-dependent resonant frequency drift. Its 50 MIPS core updates the PWM frequency every cycle to maintain the resonant tank near zero-crossing, and the on-chip analog comparators capture zero-current detection events for burst-mode control. The 4-channel high-speed PWM supports complementary outputs with adjustable dead-time down to 7.5 ns, critical for Class-D induction-heating inverters running above 100 kHz. The 16 KB Flash plus 2 KB RAM fits full-bridge ZVS control plus adaptive power-factor compensation in compact induction cooktops.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504-50I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-I/TL | DSPIC33FJ16GS504T-50I/TL | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ16GS404T-50I/TL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TLA | 44-pin TLA - same | 44-pin TLA - same | 44-pin TQFP - pin-compatible family | 44-pin TLA - same |
| Maximum CPU Speed | 50 MIPS | 40 MIPS (-20%) | 50 MIPS (identical) | 50 MIPS (identical) | 50 MIPS (identical) |
| Program Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature Range | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
| PWM Resolution | 7.5 ns | 10 ns (-33%) | 7.5 ns (identical) | 7.5 ns (identical) | 7.5 ns (identical) |
| On-chip Comparators | 4 | 4 | 4 | 4 | 4 |
Key Differentiators
- Highest-performance 16KB/2KB SMPS DSC in the dsPIC33FJ16GS504 family at 50 MIPS (vs DSPIC33FJ16GS504-I/TL)
- Full 50 MIPS performance versus lower cost-optimized GS502 variant (vs DSPIC33FJ16GS502-I/SP)
- Same die available in 44-pin TQFP (PT) variant for thermal-friendly layouts (vs DSPIC33FJ16GS504-50I/PT)
Design Notes
The DSPIC33FJ16GS504-50I/TL operates from a single 3.0V to 3.6V VDD rail; place a 10 uF bulk decoupling capacitor close to each VDD pin and 0.1 uF ceramics on every VDD/VSS pair to suppress the high-frequency switching noise from the on-chip PWM and ADC peripherals. A separate AVDD/AVSS filtered from the digital rails using a ferrite bead plus 10 uF/0.1 uF decoupling keeps ADC SNR above 60 dB. The internal 2.5V voltage regulator for the core does not require external passives beyond the recommended bulk capacitor.
Estimated: at 50 MIPS with all peripherals active, the die draws roughly 35-40 mA from VDD (approx 130 mW dissipation at 3.3V). The 44-pin TLA package has a typical theta_JA of approximately 70-80 C/W on a 4-layer JEDEC test PCB, so the junction temperature rise is roughly 10 C above ambient at full activity. For SMPS applications where the device sits near hot magnetics and power MOSFETs, route the PCB to spread heat across a copper pour under the exposed pad region (the TLA package is pin-compatible with TQFP and supports similar PCB thermal spreading techniques).
Keep analog input traces (AN0-AN9, comparator inputs, op-amp inputs) short and away from the PWM output traces; route PWM traces on the opposite side of the PCB and guard them with a ground pour to minimize capacitive coupling into the analog front end. Place the 10 nF capacitor for the internal voltage regulator within 5 mm of the AVDD pin. Use a solid ground plane on layer 2 beneath the entire DSC, and stitch vias liberally around PWM outputs to suppress radiated EMI from the 7.5 ns-edge transitions.
The 'TLA' package suffix designates a TQFP-style surface-mount variant; the PCB land pattern differs from the 44-pin TQFP (PT) variant even though the die and pinout are the same - do not interchange without verifying the footprint. The ICSP programming pins PGEC1/PGED1 (and PGEC2/PGED2) must be available at the board edge or test pad for in-circuit programming; never tie them directly to VDD or GND. The 16 KB Flash endurance specification is rated for 10,000 erase/write cycles minimum - design the firmware update mechanism to wear-level across the Flash page.
Compliance Information
RoHS and lead-free per Microchip product page; industrial temperature grade only - no AEC-Q100 automotive grade in this family. Halogen-free status not explicitly stated in provided data; flagged 'unknown'.
