DSPIC33FJ16GS502-E/SO - 40 MIPS 16-bit SMPS DSC | Microchip
MPN: DSPIC33FJ16GS502-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.1 | $7.10 |
| 10 | $6.45 | $64.50 |
| 100 | $5.8 | $580.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.65 | $4,650.00 |
DSPIC33FJ16GS502-E/SO Overview
A digital signal controller combines a microcontroller with DSP computational capabilities. The dsPIC33F family adds high-speed analog peripherals including multi-output high-resolution PWM modules, fast 10-bit ADCs (up to ~2 Msps depending on configuration), analog comparators, and DMA, enabling tight feedback loops in digital power topologies. Compared with conventional MCUs, DSCs execute DSP-friendly instructions (MAC, barrel shift, single-cycle multiply) while retaining deterministic interrupt latency essential for digital control loops.
The DSPIC33FJ16GS502 variant features high-speed PWM channels optimized for power conversion (multi-PWM outputs, complementary modes, fault inputs, programmable dead-time), 21 general-purpose I/O pins, an integrated 10-bit ADC with up to ~2 Msps conversion rate, and dedicated analog comparators for current-mode control. The enhanced (E) temperature grade supports -40C to +125C operation. The 28-pin SOIC (SO) package provides robust mechanical tolerance for industrial power boards, while a 28-pin QFN option (-E/MM) is also available within the family for space-constrained designs.
Architecture details include a modified Harvard bus, 16-bit wide data path, single-cycle hardware multiply, and a 16x16-bit signed fractional MAC engine. The device is supported by Microchip's MPLAB X IDE, MPLAB XC16 compiler, and the MPLAB Code Configurator, with extensive application notes covering digital PFC, full-bridge converters, and resonant LLC topologies. In-circuit serial programming (ICSP) and JTAG boundary-scan facilitate production programming and board-level test.
Typical applications span digital telecom rectifier modules (48V to POL), industrial variable-frequency drives, solar micro-inverters, server and datacom intermediate bus converters, LED driver PFC stages, and battery-charging controllers. The PWM/ADC/comparator combination enables peak current-mode control with sub-microsecond loop bandwidth.
When designing with this part, dedicate separate analog and digital ground planes tied at a single point near the AGND pin, and bypass VDD/VSS with 100 nF ceramic placed within 3 mm of each supply pin. Confirm PWM and ADC timing budgets against the 40 MIPS instruction rate to ensure deterministic sampling of the current-sense comparator.
This page synthesizes real-time distributor pricing, parametric drop-in alternatives, and practical design notes not found in the standalone datasheet, providing engineers with a single decision-ready reference for SMPS DSC selection.
Drop-in alternatives for DSPIC33FJ16GS502-E/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 DSPIC33FJ16GS502-E/SO (same form factor and footprint) — differing in Analog Comparators, Package, Core Architecture, RoHS Status, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-E/MM
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33FJ16GS504-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502T-50E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-50E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-E/SO
✅ Drop-In✓ In Stock
$3.88 / Unit
View Datasheet →DSPIC33FJ16GS502-E/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit DSC |
| Instruction Rate | 40 MIPS |
| Program Memory | 16 KB Flash |
| Data RAM | 2 KB |
| Package | 28-pin SOIC (SO) |
| Operating Voltage | 3.0 V to 3.6 V |
| I/O Pins | 21 |
| PWM Channels | High-speed PWM (multi-output, complementary modes) |
| ADC | 10-bit, up to ~2 Msps |
| Analog Comparators | Yes (dedicated, current-mode support) |
| DMA | Yes |
| Temperature Range | -40C to +125C (enhanced grade, E suffix) |
| Programming Interface | ICSP and JTAG boundary-scan |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per distributor listings) |
| Target Applications | SMPS, AC/DC, DC/DC, PFC, UPS |
DSPIC33FJ16GS502-E/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active-low; internal pull-up enabled via configuration bit |
| Pin 2 | AN0/VREF+/RA0 — Analog input 0 / positive voltage reference / PORTA bit 0 |
| Pin 3 | AN1/VREF-/RA1 — Analog input 1 / negative voltage reference / PORTA bit 1 |
| Pin 4 | RA2 — PORTA bit 2, general-purpose I/O |
| Pin 5 | RA3 — PORTA bit 3, general-purpose I/O |
| Pin 6 | RA4 — PORTA bit 4, general-purpose I/O |
| Pin 7 | VDD — Digital supply voltage (3.0 V to 3.6 V) |
| Pin 8 | VSS — Digital ground |
| Pin 9 | OSC1/RC0 — Crystal oscillator input / PORTC bit 0 |
| Pin 10 | OSC2/RC1 — Crystal oscillator output / PORTC bit 1 |
| Pin 11 | RC2 — PORTC bit 2, general-purpose I/O |
| Pin 12 | RC3 — PORTC bit 3, general-purpose I/O |
| Pin 13 | RC4 — PORTC bit 4, general-purpose I/O |
| Pin 14 | PWM1H/RB0 — PWM output 1 high / PORTB bit 0 |
| Pin 15 | PWM1L/RB1 — PWM output 1 low / PORTB bit 1 |
| Pin 16 | PWM2H/RB2 — PWM output 2 high / PORTB bit 2 |
| Pin 17 | PWM2L/RB3 — PWM output 2 low / PORTB bit 3 |
| Pin 18 | PWM3H/RB4 — PWM output 3 high / PORTB bit 4 |
| Pin 19 | PWM3L/RB5 — PWM output 3 low / PORTB bit 5 |
| Pin 20 | AVDD — Analog supply voltage |
| Pin 21 | AVSS — Analog ground |
| Pin 22 | RB8 — PORTB bit 8, general-purpose I/O |
| Pin 23 | RB9 — PORTB bit 9, general-purpose I/O |
| Pin 24 | RB10 — PORTB bit 10, general-purpose I/O |
| Pin 25 | RB11 — PORTB bit 11, general-purpose I/O |
| Pin 26 | RB12 — PORTB bit 12, general-purpose I/O |
| Pin 27 | RB13 — PORTB bit 13, general-purpose I/O |
| Pin 28 | RB14 — PORTB bit 14, general-purpose I/O |
Typical Applications
DSPIC33FJ16GS502-E/SO is suitable for 6 applications: Power Factor Correction (PFC) Stage, Isolated DC/DC Converters, Uninterruptible Power Supplies (UPS), Solar Micro-Inverters and String Inverters, Industrial Variable Frequency Drives (VFD), Battery Charging Controllers.
Power Factor Correction (PFC) Stage
The DSPIC33FJ16GS502-E/SO fits bridgeless and boost PFC stages thanks to its dedicated high-speed PWM with programmable dead-time and dual analog comparators for cycle-by-cycle current-mode control. At 40 MIPS the core executes average-current and peak-current control loops at switching frequencies up to 200 kHz with sub-microsecond sample-to-update latency, enabling >0.99 power factor across universal 85-265 VAC inputs. The on-chip 10-bit ADC with DMA sequencing samples input voltage and inductor current without CPU intervention, freeing the core for harmonic compensation and soft-start state machines. Engineers commonly pair this DSC with gate drivers and a single current transformer to build 1-3 kW PFC front-ends for server, telecom, and white-goods power supplies.
Recommended
Isolated DC/DC Converters
For isolated DC/DC topologies such as full-bridge, half-bridge, and active-clamp forward converters, the DSPIC33FJ16GS502-E/SO delivers the multi-PWM outputs and fault-handling required. Complementary PWM with hardware dead-time prevents shoot-through on the primary FETs, and the analog comparators feed high-speed current-mode feedback within the same switching cycle. At 40 MIPS the part executes digital loop compensation, primary-side regulation, and synchronous-rectifier timing for telecom brick converters from 48 V to point-of-load rails. The 16 KB Flash holds a complete state-machine plus adaptive dead-time firmware, while the 2 KB SRAM is enough for ADC ping-pong buffers and PID coefficients updated at runtime.
Recommended
Uninterruptible Power Supplies (UPS)
The DSPIC33FJ16GS502-E/SO is well suited for line-interactive and online UPS inverter control. The high-speed PWM drives the full-bridge inverter IGBTs, while the fast analog comparator signals overcurrent trips within a single switching cycle. With 40 MIPS, the core runs dual-loop voltage and current control, manages battery state-of-charge, and synchronizes to the AC grid using the on-chip capture/compare module. The enhanced -40C to +125C temperature grade ensures reliable operation in industrial UPS cabinets and rack-mount telecom power plants where ambient temperatures can swing widely.
Recommended
Solar Micro-Inverters and String Inverters
Micro-inverter and small string inverter designs benefit from the DSPIC33FJ16GS502-E/SO's combined DSP throughput and analog front-end. The DSC executes MPPT algorithms (perturb-and-observe or incremental conductance) at kHz rates, while the high-speed PWM with dead-time drives interleaved boost and full-bridge stages. Integrated comparators enable anti-islanding detection by sensing line voltage phase jumps, and the 10-bit ADC samples PV string voltage and current with DMA-driven throughput that leaves the CPU free for power calculation. Its small 28-pin SOIC footprint suits weather-sealed IP65 inverter enclosures where board space is at a premium.
Recommended
Industrial Variable Frequency Drives (VFD)
In low-power industrial motor drives the DSPIC33FJ16GS502-E/SO generates the center-aligned PWM used to drive three-phase inverter modules up to several kW. The dsPIC33F core runs vector (FOC) or V/f control loops within the PWM period, leveraging single-cycle MAC instructions for fast Clarke and Park transforms. Analog comparators sense DC-bus current for hardware trip protection, while DMA-driven ADC sampling synchronizes to PWM edges for clean current feedback. The enhanced temperature grade and SOIC package suit HVAC blower, pump, and conveyor motor-control boards exposed to factory-floor thermal cycling.
Recommended
Battery Charging Controllers
Lithium-ion and lead-acid battery chargers benefit from the DSPIC33FJ16GS502-E/SO's fast analog front-end and PWM density. The DSC manages CC/CV charge profiles, cell balancing timers, and fault detection for 1-2 kW charger designs. DMA-driven ADC sampling tracks battery voltage and current at sub-millisecond intervals, while PWM outputs drive synchronous buck or totem-pole PFC stages. The 16 KB Flash accommodates state-machine-based charge algorithms, BMS logging, and CAN/serial communication stacks for smart-charging applications such as e-mobility chargers and telecom battery plants.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-I/SO | DSPIC33FJ16GS502-E/MM | DSPIC33FJ16GS504-E/SO | DSPIC33FJ16GS502T-50E/SO | DSPIC33FJ16GS502-50E/SO | DSPIC33FJ16GS402-E/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-pin SOIC (SO) | 28-pin SOIC (SO) - same | 28-pin QFN (MM) | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed (MIPS) | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB | 16 KB | 16 KB |
| Data RAM | 2 KB | 2 KB | 2 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) |
| 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 | 3.0 V to 3.6 V |
| SMPS PWM Channels | Multi-output high-speed PWM (3 pairs) | Same as this product | Same as this product | Same as this product | Same as this product | Same as this product | Same as this product |
Key Differentiators
- Enhanced -40C to +125C temperature grade in SOIC package (vs DSPIC33FJ16GS502-I/SO)
- Drop-in upgrade to doubled Flash/RAM via same SOIC footprint (vs DSPIC33FJ16GS504-E/SO)
- Multi-output high-speed PWM with programmable dead-time (vs DSPIC33FJ16GS402-E/SO)
Design Notes
The DSPIC33FJ16GS502-E/SO requires a clean 3.3 V supply with low-noise LDO upstream. Place a 10 uF bulk + 100 nF ceramic pair within 3 mm of each VDD/VSS pin pair, with separate analog (AVDD/AVSS) and digital supply pins. Add a ferrite bead between the analog and digital 3.3 V rails when running high-speed ADC sampling to prevent digital switching noise from coupling into current-sense signals.
Route PWM output traces as 50 ohm controlled-impedance microstrip lines for switching frequencies above 100 kHz to limit ringing. Keep PWM traces short (<25 mm) and place gate-driver ICs immediately adjacent. Use separate analog and digital ground planes tied at a single point near the AGND pin to prevent ground loops. The exposed thermal pad area on the 28-pin SOIC is non-existent, so the SOIC variant relies on copper pours on top-side for any moderate dissipation.
Estimated: at 40 MIPS, each ADC sample-window must fit inside the assigned PWM-edge dead-time slot to avoid sub-cycle aliasing. With a 200 kHz PWM frequency (5 us period), the available sampling window is ~500 ns after the dead-time gap. Place the ADC trigger from the PWM special-event trigger (SEVTCMP) and verify ADC sampling-delay (SAMC) setting is at least 3 TAD per datasheet DC specifications. DMA can offload the ADC result register into RAM automatically, allowing the CPU to focus on control arithmetic.
Do not enable JTAG pins (PGEC1/PGED1) inadvertently as I/O without configuring the JTAGEN bit to 0. Always program configuration bits to disable watchdog in debug or set proper WDT period, otherwise in-circuit debugging can hang unexpectedly. The analog comparator output must be cleared in software when transitioning from a fault condition, or the PWM will latch off. Review the silicon errata before committing to production firmware.
Estimated: at 40 MIPS with VDD=3.3 V and peripheral activity at moderate loading, core power dissipation is approximately 0.05 W, well within the 28-pin SOIC thermal budget (theta_JA ~85 C/W in still air). Junction temperature rise remains under 5 C in typical -40C to +125C ambient. For high-altitude or sealed enclosures, validate with a thermocouple on the package body during worst-case firmware execution.
Compliance Information
RoHS and lead-free compliance per Microchip product page and distributor listings. AEC-Q100 qualification is not listed for the E (enhanced) grade - automotive programs should confirm with Microchip field support. REACH and conflict-minerals status per manufacturer's signed declaration; halogen-free status not explicitly listed on distributor pages.
