DSPIC33FJ16GS502T-50I/SO - 50 MIPS 16-bit SMPS DSC | Microchip
MPN: DSPIC33FJ16GS502T-50I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.04 | $5.04 |
| 10 | $4.78 | $47.80 |
| 100 | $4.32 | $432.00 |
| 500 | $3.78 | $1,890.00 |
| 1,000 | $3.3 | $3,300.00 |
DSPIC33FJ16GS502T-50I/SO Overview
A Digital Signal Controller is a hybrid MCU+DSP class of microcontroller that fuses a deterministic microcontroller pipeline with single-cycle MAC DSP arithmetic, allowing closed-loop power-control algorithms (PID, state-space, predictive) to run at the same rate as the PWM switching frequency. In the broader taxonomy it sits between a microcontroller (MCU) and a digital signal processor (DSP); in the Microchip portfolio it belongs to the 16-bit dsPIC33F SMPS sub-family, itself a branch of the 16-bit PIC24/dsPIC family.
Key features include 50 MIPS operation from a 3.0-3.6V supply, six PWM outputs with 1.04 ns resolution, four high-speed analog comparators with programmable blanking, a 12-channel 10-bit ADC with 2 MSPS conversion rate, and a 16-bit timer/capture/compare block. The high-speed PWM module supports complementary, push-pull, multi-phase, and variable-phase topologies, and the cycle-by-cycle current limiting is handled in hardware for fast fault response. Industrial-grade -40C to +85C operation supports harsh power-conversion environments.
Architecture-wise the dsPIC33FJ16GS502 uses a 16-bit modified Harvard core with separate program and data buses plus an X-RAM and Y-RAM dual-read DSP path, enabling single-cycle MAC operations. The SMPS-optimized peripheral set routes comparator events directly to PWM fault inputs with sub-microsecond latency, eliminating the jitter that software-only loops introduce. Flash self-read capability supports in-application firmware updates from external memory.
Typical applications include digital PFC boost converters, phase-shifted full-bridge DC/DC modules, solar micro-inverters, uninterruptible power supplies, LED drivers with analog dimming, and synchronous-rectified buck converters. Pairing the device with high-current gate drivers and current-sense amplifiers closes the analog front-end needed for peak-current-mode control.
When designing with the DSPIC33FJ16GS502, route the analog ground return directly to the GND pin, keep the VDDCORE decoupling capacitor within 5 mm of the pin, and ensure the PWM fault pins have a defined state at reset. The 'T' suffix denotes tape-and-reel packaging while 'I' indicates the -40C to +85C industrial temperature range. The '50' speed grade refers to the maximum MIPS, not the input oscillator.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ16GS502T-50I/SO — 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 DSPIC33FJ16GS502T-50I/SO (same form factor and footprint) — differing in ADC, RoHS Status, Analog Comparators, I/O Pins, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-50I/SO
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →DSPIC33FJ16GS502-E/SO
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →DSPIC33FJ16GS502-H/SO
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33FJ16GS502T-50I/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit DSC |
| Instruction Set | 16-bit modified Harvard with DSP extensions |
| Max CPU Speed | 50 MIPS |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data RAM | 2 KB |
| Operating Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 28-pin SOIC (SO) |
| ADC | 10-bit, 12-channel, up to 2 MSPS |
| PWM Outputs | 6 channels with high-speed PWM module |
| PWM Resolution | 1.04 ns at 50 MIPS |
| Analog Comparators | 4 high-speed comparators with programmable blanking |
| Timers | 16-bit Timer/Capture/Compare blocks |
| I/O Pins | 21 general-purpose I/O |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
DSPIC33FJ16GS502T-50I/SO Pin Configuration
| Pin 1 | SDA/RG0 — I2C data or remappable I/O pin |
| Pin 2 | SCL/RG1 — I2C clock or remappable I/O pin |
| Pin 3 | RP22/RA0 — Remappable peripheral pin |
| Pin 4 | RP23/RA1 — Remappable peripheral pin |
| Pin 5 | RP24/RA2 — Remappable peripheral pin |
| Pin 6 | RP25/RA3 — Remappable peripheral pin |
| Pin 7 | RP26/RA4 — Remappable peripheral pin |
| Pin 8 | VDD — Core and peripheral supply voltage (3.0-3.6V) |
| Pin 9 | VSS — Ground reference |
| Pin 10 | OSC1/RA5 — External crystal oscillator input or GPIO |
| Pin 11 | OSC2/RA6 — External crystal oscillator output or GPIO |
| Pin 12 | RP19/RA7 — Remappable peripheral pin |
| Pin 13 | RP20/RB0 — Remappable peripheral pin |
| Pin 14 | RP21/RB1 — Remappable peripheral pin |
| Pin 15 | RP8/RB2 — PWM1H or remappable peripheral pin |
| Pin 16 | RP9/RB3 — PWM1L or remappable peripheral pin |
| Pin 17 | RP10/RB4 — PWM2H or remappable peripheral pin |
| Pin 18 | RP11/RB5 — PWM2L or remappable peripheral pin |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Core and peripheral supply voltage (3.0-3.6V) |
| Pin 21 | RP12/RB6 — PWM3H or remappable peripheral pin |
| Pin 22 | RP13/RB7 — PWM3L or remappable peripheral pin |
| Pin 23 | RP14/RB8 — Comparator or remappable peripheral pin |
| Pin 24 | RP15/RB9 — Comparator or remappable peripheral pin |
| Pin 25 | RP16/RB10 — Comparator or remappable peripheral pin |
| Pin 26 | RP17/RB11 — Comparator or remappable peripheral pin |
| Pin 27 | AN12/RB12 — Analog input or remappable peripheral pin |
| Pin 28 | AN13/RB13 — Analog input or remappable peripheral pin |
Typical Applications
DSPIC33FJ16GS502T-50I/SO is suitable for 6 applications: Digital Power Factor Correction (PFC) Boost Converter, Phase-Shifted Full-Bridge DC/DC Module, Solar Micro-Inverter Controller, Uninterruptible Power Supply (UPS) Controller, Digital LED Driver with Analog Dimming, Synchronous-Rectified Buck Converter Controller.
Digital Power Factor Correction (PFC) Boost Converter
The DSPIC33FJ16GS502T-50I/SO is purpose-built for digital PFC boost converters operating at 100 kHz to 300 kHz switching frequencies. The 50 MIPS DSP engine executes average-current-mode control loops with sub-microsecond latency, while the dedicated high-speed PWM module provides 1.04 ns edge resolution for clean PFC switching edges. The 10-bit 2 MSPS ADC samples inductor current and rectified input voltage simultaneously, eliminating the phase lag that plagues discrete PFC controllers. Built-in four high-speed comparators handle cycle-by-cycle overcurrent protection, and the comparator-to-PWM fault path runs in hardware with sub-microsecond response. With 16 KB Flash the device fits full IEC 61000-3-2 THD compliance firmware plus inrush soft-start, brown-out recovery, and AC line drop detection.
Recommended
Phase-Shifted Full-Bridge DC/DC Module
Phase-shifted full-bridge converters require precise dead-time control and adaptive duty-cycle adjustment, both handled in hardware by the DSPIC33FJ16GS502T-50I/SO's PWM module. The device's 6 PWM channels drive four primary-side MOSFETs with programmable dead-band and the synchronous rectifiers with adaptive timing, achieving ZVS transitions at light loads. The 50 MIPS core runs the state-space control loop plus adaptive dead-time compensation, and the 2 KB RAM holds ADC sample buffers for the multi-cycle current averaging. Industrial-grade -40C to +85C operation supports telecom 48V bus converters and industrial 24V brick applications.
Recommended
Solar Micro-Inverter Controller
The DSPIC33FJ16GS502T-50I/SO serves as the MPPT plus grid-tie control MCU in residential solar micro-inverters. Its 50 MIPS performance executes perturb-and-observe MPPT at 10 kHz with anti-islanding grid monitoring in parallel, while the 16 KB Flash holds MPPT, PLL, and anti-islanding firmware simultaneously. The high-speed ADC samples PV panel voltage, current, and grid voltage simultaneously for the grid-synchronization PLL, and the PWM module drives the H-bridge with sub-microsecond dead-time adjustment to maximize efficiency. Industrial-grade operation handles rooftop thermal loading, and the small 28-SOIC footprint enables the compact 250-600 W micro-inverter form factor.
Recommended
Uninterruptible Power Supply (UPS) Controller
Online double-conversion UPS systems require tightly synchronized inverter control plus battery-charge management, both functions the DSPIC33FJ16GS502T-50I/SO executes on a single die. The high-speed PWM module generates the sinusoidal PWM (SPWM) inverter output at 20-50 kHz with low harmonic distortion, while the ADC samples the DC bus, battery, and AC output for closed-loop regulation. The 16 KB Flash is sufficient for the inverter control law plus battery state-of-charge estimation, and 2 KB RAM holds the 256-point sine LUT and instantaneous sample buffers. Industrial temperature range supports server-room and light-industrial UPS installations up to 3 kVA.
Recommended
Digital LED Driver with Analog Dimming
High-brightness LED drivers using the DSPIC33FJ16GS502T-50I/SO combine constant-current PWM dimming with analog dimming via DAC-controlled reference. The high-speed PWM module drives the buck converter FET at 200 kHz with adjustable dead-time for synchronous-rectified topologies, while the 10-bit ADC monitors LED string current for closed-loop regulation. The 50 MIPS core runs the analog-dimming-to-PWM-translation firmware plus thermal-foldback protection. The 16 KB Flash holds multiple LED string profiles and NTC-thermistor-based thermal derating curves. Industrial temperature range supports commercial and architectural LED driver installations.
Recommended
Synchronous-Rectified Buck Converter Controller
The DSPIC33FJ16GS502T-50I/SO delivers peak-current-mode control for synchronous buck converters up to 20A at 1 MHz switching. The high-speed comparator inputs feed the PWM module's cycle-by-cycle current-limit hardware path, achieving sub-microsecond overcurrent response without software intervention. The 50 MIPS core runs the voltage-mode or peak-current-mode control loop, while the 10-bit ADC samples VOUT and IOUT for the outer voltage loop and feedforward. The 6 PWM channels drive high-side and low-side FETs with programmable dead-band to prevent shoot-through, and 2 KB RAM handles the inductor current sample buffer and feedforward coefficients.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502T-50I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-I/SO | DSPIC33FJ16GS502-50I/SO | DSPIC33FJ16GS502-E/SO | DSPIC33FJ16GS502-H/SO |
|---|---|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC - same | dsPIC33F 16-bit DSC - same | dsPIC33F 16-bit DSC - same | dsPIC33F 16-bit DSC - same |
| Max CPU Speed | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Data RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Temperature | -40C to +85C (I-grade) | -40C to +85C | -40C to +85C | -40C to +125C (E-grade) | -40C to +150C (H-grade) |
| PWM Channels | 6 channels | 6 channels | 6 channels | 6 channels | 6 channels |
| Analog Comparators | 4 high-speed | 4 high-speed | 4 high-speed | 4 high-speed | 4 high-speed |
| ADC | 10-bit, 12-channel, 2 MSPS | 10-bit, 12-channel, 2 MSPS | 10-bit, 12-channel, 2 MSPS | 10-bit, 12-channel, 2 MSPS | 10-bit, 12-channel, 2 MSPS |
Key Differentiators
- Industrial-grade -40C to +85C temperature range with SMPS-optimized peripheral set (vs DSPIC33FJ16GS502-H/SO)
- Purpose-built high-speed PWM with 1.04 ns resolution and comparator-triggered fault path (vs DSPIC33FJ16GP102T-I/SS)
- Same-family 28-pin SOIC option for compact PCB layouts (vs DSPIC33FJ16GS404T-50I/ML)
Design Notes
Estimated: at 50 MIPS continuous operation from a 3.3V supply in the 28-pin SOIC package, typical core power consumption is approximately 50 mA (165 mW). The 28-SOIC has a theta_JA of approximately 75 C/W on a standard 2-layer 1-oz PCB, giving a junction-temperature rise of about 12 C above ambient at full MIPS. Inductive-switching co-location with power FETs can raise ambient by 15-25 C; derate clock speed or add thermal vias under the exposed pad to maintain junction below 125 C for industrial -40C to +85C operation. Microchip datasheet confirms thermal-shutdown engages above 150 C junction.
Place the 10 uF bulk VDD decoupling capacitor within 5 mm of pins 8 and 20 with a 0.1 uF ceramic capacitor in parallel; the GS502 has two VDD pins and two VSS pins that must both be decoupled. Route PWM traces with matched impedance and keep them short - PWM1H/PWM1L and PWM2H/PWM2L pairs drive high-speed MOSFETs where 5 ns skew translates to measurable shoot-through. Analog inputs (AN12/AN13) should be guarded with a ground trace on both sides to avoid digital-noise coupling from PWM edges. Use a separate analog ground island tied to VSS at a single point near the GND pin.
Do not exceed VDD of 3.6V - the GS502 is a 3.3V part with no 5V tolerance on any pin. PWM outputs are 3.3V CMOS, so a level shifter or gate driver is required to drive most power MOSFETs directly. The '50' speed-grade suffix denotes 50 MIPS maximum, not 50 MHz oscillator input; the internal oscillator provides 50 MIPS directly from the calibrated RC. Always read the silicon errata document at https://www.microchip.com before production firmware development to identify any ADC or PWM workarounds for the specific silicon revision.
When routing the high-speed PWM outputs to gate drivers, place a 33 ohm series-termination resistor at the DSC pin to damp the transmission-line reflections on traces longer than 25 mm. The PWM module's 1.04 ns edge resolution can otherwise produce significant ringing on the gate-driver input. The four analog comparators have programmable blanking - configure blanking to mask the leading-edge ringing of the current-sense signal for 100-200 ns to avoid false comparator trips during FET switching transitions. Use the Microchip AN1078 application note for PFC layout guidance.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C I-grade temperature range; choose E-grade for 125 C or H-grade for 150 C if automotive AEC-Q100 is required.
