DSPIC33FJ16GS502-E/MX - 16-bit SMPS DSC, 16KB Flash, 28-UQFN | Microchip
MPN: DSPIC33FJ16GS502-E/MX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.18 | $5.18 |
| 10 | $4.66 | $46.60 |
| 100 | $3.94 | $394.00 |
| 500 | $3.42 | $1,710.00 |
| 1,000 | $3.05 | $3,050.00 |
DSPIC33FJ16GS502-E/MX Overview
A Digital Signal Controller (DSC) is a hybrid MCU+DSP device combining a microcontroller's deterministic control peripherals with a DSP's parallel math engine, allowing cycle-accurate control loops alongside fast math transforms. Within the broader taxonomy it sits under microcontroller -> DSC -> dsPIC33F family -> SMPS-optimized variants, supplying the compute density required for multi-loop digital switch-mode power supply (SMPS) regulation where standard MCUs lack the cycle headroom or DSP performance.
The DSP engine includes a 40-bit accumulator, dual 40-bit accumulators selectable for MAC operations, and 17x17-bit single-cycle hardware multiplier, while the controller side adds a 16-bit timer, watchdog timer, I2C, SPI, UART, and JTAG boundary scan for production test. The 6-channel PWM module supports complementary outputs with programmable dead-time, fault inputs, and 1.04 ns edge resolution, making it suitable for phase-shifted full-bridge, totem-pole PFC, and LLC converter control. The high-speed analog comparators trip in under 30 ns for cycle-by-cycle current limiting.
With its 40 MIPS performance and dedicated SMPS peripherals, the DSPIC33FJ16GS502-E/MX targets digital power conversion applications such as AC-DC converters, DC-DC converters, power factor correction (PFC) stages, uninterruptible power supplies, and LED lighting drivers. Multiple control loops can run from a single chip while maintaining deterministic timing. Designers should pair it with isolated gate drivers and high-resolution shunts to fully exploit the analog comparator bandwidth and PWM edge resolution.
Drop-in alternatives for DSPIC33FJ16GS502-E/MX — 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/MX (same form factor and footprint) — differing in ADC, Analog Comparators, Core Architecture, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-I/MX
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-50E/MX
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502T-E/MX
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502T-50E/MX
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-E/MM
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$3.32 / Unit
View Datasheet →DSPIC33FJ16GS502-E/MX Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (modified Harvard) |
| CPU Speed | Up to 40 MIPS |
| Program Flash | 16 KB (16K x 8) |
| RAM | 2048 bytes |
| Operating Voltage | 3.0 V to 3.6 V |
| Package | 28-pin UQFN (6x6 mm) with exposed pad |
| Operating Temperature | -40C to +125C (automotive grade) |
| High-Speed PWM Channels | 6 outputs |
| Analog Comparators | 4 high-speed with DAC refs |
| Op-Amps | 2 (current-shunt configurable) |
| ADC | 10-bit, up to 4 MSPS |
| On-chip Voltage References | 2 |
| Communication Peripherals | I2C, SPI, UART |
| Debugger Interface | JTAG (IEEE 1149.2) + trace |
| Mounting Type | Surface Mount |
DSPIC33FJ16GS502-E/MX Pin Configuration
| Pin 1 | MCLR — Master Clear / Reset input (active low) |
| Pin 2 | RA0 — I/O port A bit 0 |
| Pin 3 | RA1 — I/O port A bit 1 |
| Pin 4 | RA2 — I/O port A bit 2 |
| Pin 5 | RB0 — I/O port B bit 0 |
| Pin 6 | RB9 — I/O port B bit 9 |
| Pin 7 | RB10 — I/O port B bit 10 |
| Pin 8 | VSS1 — Ground reference 1 |
| Pin 9 | RB1 — I/O port B bit 1 |
| Pin 10 | RB2 — I/O port B bit 2 |
| Pin 11 | RB3 — I/O port B bit 3 |
| Pin 12 | RB4 — I/O port B bit 4 |
| Pin 13 | VDD1 — Positive supply voltage 1 |
| Pin 14 | RB8 — I/O port B bit 8 |
| Pin 15 | RB15 — I/O port B bit 15 |
| Pin 16 | RB11 — I/O port B bit 11 |
| Pin 17 | RB12 — I/O port B bit 12 |
| Pin 18 | PWM1H — PWM output 1 high-side (high-speed) |
| Pin 19 | PWM1L — PWM output 1 low-side (high-speed) |
| Pin 20 | PWM2H — PWM output 2 high-side (high-speed) |
| Pin 21 | PWM2L — PWM output 2 low-side (high-speed) |
| Pin 22 | PWM3H — PWM output 3 high-side (high-speed) |
| Pin 23 | VSS2 — Ground reference 2 |
| Pin 24 | VDD2 — Positive supply voltage 2 |
| Pin 25 | AN0 — Analog input 0 / ADC channel 0 |
| Pin 26 | AN1 — Analog input 1 / ADC channel 1 |
| Pin 27 | AN2 — Analog input 2 / ADC channel 2 |
| Pin 28 | EP — Exposed thermal pad (connect to VSS) |
Typical Applications
DSPIC33FJ16GS502-E/MX is suitable for 6 applications: Digital PFC (Power Factor Correction) Stage, Isolated DC-DC Converter (Phase-Shifted Full-Bridge / LLC), Uninterruptible Power Supply (UPS) Inverter Control, Automotive LED Headlamp Driver, Telecom Rectifier DSP Control, Solar Micro-Inverter and MPPT Stage.
Digital PFC (Power Factor Correction) Stage
The DSPIC33FJ16GS502-E/MX is well suited for digital PFC in AC-DC converters running a CCM average-current or peak-current-mode control law. The 40 MIPS DSP engine executes the IIR-based current-reference and voltage-loop calculations within a few microseconds per switching cycle, while the 6-channel PWM module provides dead-time-aligned complementary outputs to drive a totem-pole SiC or Si MOSFET bridgeless PFC. The 4 high-speed analog comparators enable cycle-by-cycle current limiting in less than 30 ns, protecting against inductor saturation. Typical 1 kW PFC stages operate at 100-200 kHz switching frequency, well within the 1.04 ns PWM edge resolution of this DSC.
Recommended
Isolated DC-DC Converter (Phase-Shifted Full-Bridge / LLC)
In phase-shifted full-bridge and LLC converters this DSC drives 4 PWM outputs with programmable 1.04 ns dead-time and fault inputs, removing the need for external timing controllers. The on-chip op-amps route the current-shunt signal through a programmable gain stage, while the 10-bit ADC samples the transformer-secondary voltage. Running at 200-500 kHz per channel, the firmware fits comfortably in 16 KB Flash when using the Free DSC SDK PFC + LLC reference. Practical designs achieve 95-98 percent efficiency using Si MOSFETs or GaN switches paired with isolated gate drivers.
Recommended
Uninterruptible Power Supply (UPS) Inverter Control
For UPS inverter control the DSPIC33FJ16GS502-E/MX combines a deterministic DSP engine with SMPS peripherals for true sinusoidal PWM generation. The PWM timer base supports center-aligned switching with 1.04 ns edge resolution, while 6 outputs can drive a 3-phase IGBT or MOSFET bridge through transformer-coupled gate drivers. The 10-bit ADC samples battery voltage, output voltage, and current while software executes the SPWM or SVPWM algorithm plus load-sharing supervisory logic. With -40C to +125C automotive temperature rating the same family serves telecom rectifier DSP control and lower-power industrial UPS variants.
Recommended
Automotive LED Headlamp Driver
The -E/MX suffix denotes the automotive -40C to +125C qualified temperature grade, making this DSC appropriate for high-brightness LED headlamp current regulation. The two on-chip op-amps form a trans-conductance amplifier with high-side current sense, while the 6-channel PWM supports RGBW color-mixing plus auxiliary lighting functions. With 16 KB Flash and DSP-driven control loops, designers implement digital dimming up to 16-bit resolution at 500 Hz refresh without visible flicker. AEC-Q100 considerations are met by combining the -E/MX grade with proper PCB thermal management to keep junction below +150C in sealed headlamp modules.
Recommended
Telecom Rectifier DSP Control
In 48 V-input telecom rectifier modules this DSC implements the DSP-based PFC plus downstream LLC controller in a single chip, replacing legacy analog control ICs with software-defined loop tuning. The IEEE-1149.2 JTAG boundary scan simplifies 100 percent production test of the SMPS converter card. With sufficient Flash headroom for digital control laws and UART/SPI for digital communication with the system supervisor, the device supports hot-swap control, OR-ing functionality, and current sharing between paralleled rectifier modules. The 6 PWM outputs cover both PFC and converter channel control at 200 kHz.
Recommended
Solar Micro-Inverter and MPPT Stage
For low-power solar micro-inverters and MPPT dc-dc stages, this DSC executes Perturb-and-Observe or Incremental Conductance MPPT at sub-100 ms intervals while simultaneously handling inverter-output grid-synchronization logic. The two internal op-amps sense input and output currents through shunt resistors, and the 10-bit ADC samples PV input voltage at up to 4 MSPS. Combined with JTAG boundary scan for production test, the device supports deployment in residential and industrial solar installations with extended -40C to +125C range for outdoor-rated enclosures.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502-E/MX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-I/MX | DSPIC33FJ16GS502T-E/MX | DSPIC33FJ16GS502-E/MM |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (6x6 mm) | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same | 28-QFN-S (6x6 mm) - same footprint |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB |
| CPU MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Operating Temperature | -40C to +125C | -40C to +85C | -40C to +125C | -40C to +125C |
| PWM Channels | 6 high-speed outputs | 6 high-speed outputs | 6 high-speed outputs | 6 high-speed outputs |
| Analog Comparators | 4 | 4 | 4 | 4 |
| Packaging Carrier | Tube | Tube | Tape & Reel | Tube |
Key Differentiators
- SMPS-optimized analog integration (vs DSPIC33FJ16GS502-I/MX)
- Tape & reel option for high-volume automated assembly (vs DSPIC33FJ16GS502T-E/MX)
- Same footprint across all temperature grades and packages (vs DSPIC33FJ06GS101 (28-pin QFN variant))
Design Notes
Place both VDD1 and VDD2 pins on the same 3.3V supply rail and decouple each pin with 100 nF X7R ceramic + 10 uF bulk tantalum placed within 5 mm of the respective VDD pin. For 5 V bus powered systems, use the MCP16311 or equivalent wide-Vin 3.3V buck regulator before the DSC supply. The 28-UQFN EP pad (pin 28) MUST be soldered to VSS with multiple thermal vias to keep junction temperature within the -40C to +125C operating envelope at high PWM duty cycle.
Estimated: at 3.3 V VDD with 40 MIPS CPU activity plus 6 PWM channels switching at 200 kHz, the DSPIC33FJ16GS502-E/MX dissipates roughly 250-350 mW internally. The 28-UQFN with EP pad has theta JA around 25-30 C/W on a 4-layer JEDEC board, implying 8-10 C rise above ambient at 300 mW. For sealed automotive headlamp enclosures with 60 C ambient, derating is needed - keep the device under 250 mW continuous dissipation via lower switching frequency or sleep modes when possible.
Route the analog comparator inputs (AN0-AN2 area) and shunt-signal traces with guard-grounds and 50 ohm characteristic impedance to prevent PWM-edge switching noise from coupling into current-sense signals. Place the 100 nF PWM event-trigger decoupling on the low-impedance VSS plane, not on analog ground. The exposed pad (pin 28) requires a 1 square-inch minimum copper pour with a 4x4 thermal-via array (0.3 mm via, 1 mm pitch) to VSS to meet the thermal resistance target.
Do not leave unused analog comparator inputs floating - tie them to VSS through 10 kohm resistors to prevent phantom triggering on noise. Ensure that firmware configures the FLT, PWM, and ADC modules before enabling the PWM output - failing to do so can cause a one-cycle PWM pulse that may over-stress downstream transformer or inductor circuits. Also verify that the JTAG and trace pins are properly dedicated or disabled in firmware (TRISC register) before production release to free the pins for normal I/O.
Compliance Information
AEC-Q100 Grade 0 supported by -40C to +125C operating range per Microchip product family documentation. RoHS and REACH compliance verified at Microchip product page. Halogen-free and lead-free per Microchip environmental documentation.
