DSPIC33FJ16GS502-H/SO - 16-bit DSC, 16KB Flash, 50MHz | Microchip
MPN: DSPIC33FJ16GS502-H/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.42 | $44.20 |
| 100 | $3.85 | $385.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $2.98 | $2,980.00 |
DSPIC33FJ16GS502-H/SO Overview
A Digital Signal Controller (DSC) is a hybrid device that merges a microcontroller (MCU) with a digital signal processor (DSP). Within the broader semiconductor hierarchy, a DSC sits between a microcontroller and a full DSP, optimized for deterministic real-time control loops. The dsPIC33F family specifically targets Switch-Mode Power Supply (SMPS) and digital power conversion, integrating high-speed PWM, ADC, and analog comparators on-chip. Within the Microchip taxonomy, the DSC belongs to the dsPIC33F SMPS sub-family, which is part of the 16-bit DSC category, then the broader Microcontroller hierarchy, and ultimately the Integrated Circuits class of semiconductors.
Key features include 4 high-speed PWM outputs with up to 9 PWM pairs for multi-loop SMPS topologies, a 10-bit ADC with up to 500 ksps conversion rate, three on-chip analog comparators for cycle-by-cycle current limiting, and a JTAG boundary scan interface. The device integrates a single-cycle MAC engine, a 40-bit accumulator for DSP operations, and supports fractional (Q15) data formats. It also offers 5 external interrupt sources, a watchdog timer, and an in-circuit/in-application programming capability for field updates.
Typical applications include digital switch-mode power supplies (SMPS), AC/DC converters, DC/DC converters, power factor correction (PFC) circuits, uninterruptible power supplies (UPS), and digital lighting ballasts. The 28-pin SOIC package variant (the -H/SO) supports industrial temperature range -40C to +150C and provides sufficient I/O for multi-loop control without requiring external glue logic.
When designing with this device, allocate adequate PCB area for the analog and power-ground split to keep PWM switching noise away from ADC inputs. Use the device's high-speed analog comparators for hardware cycle-by-cycle current protection, which is faster than software-based approaches. Pairing with a suitable gate driver and proper decoupling on AVDD/VDD pins improves ADC accuracy and overall system stability in high-noise environments.
This page synthesizes Microchip datasheet specifications, distributor pricing, drop-in package alternatives (28-pin SOIC), and practical SMPS design notes not found on a single manufacturer page, delivering information gain for engineers evaluating dsPIC33F SMPS controllers.
Drop-in alternatives for DSPIC33FJ16GS502-H/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-H/SO (same form factor and footprint) — differing in Analog Comparators, RoHS Status, I/O Pins, Package, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-E/SO
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →DSPIC33FJ16GS502-50I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-H/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F DSC (16-bit MCU + DSP) |
| Family | dsPIC33F SMPS - High-Speed PWM, ADC and Comparators |
| Program Memory (Flash) | 16 KB |
| Data Memory (RAM) | 2 KB (2048 bytes) |
| Maximum CPU Speed | 50 MHz (40 MIPS) |
| Operating Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40C to +150C (Industrial/Automotive, 'H' spec) |
| ADC | 10-bit, 1 Msps, up to 8 channels |
| Analog Comparators | 3 on-chip |
| PWM Channels | 4 outputs (up to 9 PWM pairs) |
| PWM Resolution | Up to 16-bit at lower frequencies |
| I/O Pins | 21 (varies by package) |
| Timers | Multiple 16-bit timers (Timer1/2/3 type) |
| Communication Interfaces | UART, SPI, I2C (peripheral set varies) |
| Package | 28-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| JTAG / Programming | In-Circuit Serial Programming (ICSP), JTAG boundary scan |
| DSP Engine | Single-cycle MAC, 40-bit accumulator, Q15 fractional |
| Watchdog Timer | Yes |
| RoHS Status | Compliant (per Microchip product page) |
DSPIC33FJ16GS502-H/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / analog / PWM I/O |
| Pin 3 | RA1 — Port A bit 1 / analog / PWM I/O |
| Pin 4 | RA2 — Port A bit 2 / analog / PWM I/O |
| Pin 5 | RB0 — Port B bit 0 / PWM I/O |
| Pin 6 | RB9 — Port B bit 9 / PWM I/O |
| Pin 7 | RB10 — Port B bit 10 / PWM I/O |
| Pin 8 | VSS1 — Digital ground 1 |
| Pin 9 | RB1 — Port B bit 1 / PWM I/O |
| Pin 10 | RB2 — Port B bit 2 / PWM I/O |
| Pin 11 | RB3 — Port B bit 3 / PWM I/O |
| Pin 12 | RB4 — Port B bit 4 / PWM I/O |
| Pin 13 | VDD1 — Digital supply 1 (3.0-3.6V) |
| Pin 14 | RB8 — Port B bit 8 / PWM I/O |
| Pin 15 | RB15 — Port B bit 15 / PWM I/O |
| Pin 16 | RB5 — Port B bit 5 / PWM I/O |
| Pin 17 | RB6 — Port B bit 6 / PWM I/O |
| Pin 18 | RB7 — Port B bit 7 / PWM I/O |
| Pin 19 | VSS2 — Digital ground 2 |
| Pin 20 | AVSS — Analog ground |
| Pin 21 | RB11 — Port B bit 11 / PWM I/O |
| Pin 22 | RB12 — Port B bit 12 / PWM I/O |
| Pin 23 | RB13 — Port B bit 13 / PWM I/O |
| Pin 24 | RB14 — Port B bit 14 / PWM I/O |
| Pin 25 | AVDD — Analog supply (3.0-3.6V) |
| Pin 26 | VDD2 — Digital supply 2 |
| Pin 27 | RA3 — Port A bit 3 / analog / PWM I/O |
| Pin 28 | OSC1 — Crystal oscillator input / external clock |
Typical Applications
DSPIC33FJ16GS502-H/SO is suitable for 6 applications: Digital Switch-Mode Power Supply (SMPS), AC/DC Power Converter with PFC, DC/DC Converter (Buck / Boost / SEPIC), Uninterruptible Power Supply (UPS), Digital Lighting Ballast (HID / LED Driver), Battery Charger with Digital Control.
Digital Switch-Mode Power Supply (SMPS)
The DSPIC33FJ16GS502-H/SO is engineered for digital SMPS control, where its 50 MHz / 40 MIPS dsPIC33F DSC core runs voltage-mode and peak-current-mode control loops at sub-microsecond periods. The four PWM outputs can be configured into up to nine PWM pairs to drive a synchronous buck, boost, or phase-shifted full-bridge topology with adaptive dead-time insertion. Its on-chip 10-bit ADC (1 Msps) samples the output voltage and inductor current at the start of each switching cycle, while the three analog comparators provide hardware cycle-by-cycle overcurrent protection that bypasses the CPU entirely. The 16 KB Flash holds state-space controller coefficients and digital compensator tables, and the 2 KB RAM buffers ADC samples and supports MAC-based DSP filtering. Compared with a pure analog UC3842-based SMPS, it adds programmability and telemetry at the cost of a slightly higher BOM.
Recommended
AC/DC Power Converter with PFC
In AC/DC converters with active Power Factor Correction (PFC), the DSPIC33FJ16GS502-H/SO executes boost-PFC control algorithms and downstream DC/DC conversion in a single device. Its high-speed PWM drives the boost PFC MOSFET at 50-100 kHz while a second PWM channel drives the downstream DC/DC stage, sharing the same 50 MHz DSC clock for deterministic loop timing. The integrated analog comparators detect input voltage zero-crossings and inductor current peaks for transition-mode (TM) PFC, reducing BOM vs a discrete analog PFC controller. The 16 KB Flash is sufficient for table-driven THD compensation and input-voltage feed-forward, while the -40C to +150C temperature grade supports under-hood industrial SMPS environments.
Recommended
DC/DC Converter (Buck / Boost / SEPIC)
The DSPIC33FJ16GS502-H/SO drives non-isolated DC/DC converters including buck, boost, and SEPIC topologies commonly used in 12V/24V industrial bus systems. Its 3.0-3.6 V supply directly powers the device from a regulated 3.3V rail, and its PWM module supports leading-edge blanking and programmable dead-time for synchronous rectification. The integrated 10-bit ADC reads output voltage and current at rates up to 1 Msps, allowing digital compensators to adapt to load transients in microseconds. The 16 KB Flash stores multiple control profiles for different input/output voltage combinations, while the SOIC-28 package is easy to hand-solder for prototypes. Compared with the analog UC3843, the DSC adds programmable soft-start, telemetry, and fault logging.
Recommended
Uninterruptible Power Supply (UPS)
In line-interactive and online UPS systems, the DSPIC33FJ16GS502-H/SO controls the inverter stage and synchronizes output to the AC mains or generator. Its PWMs can synthesize a 50/60 Hz sine wave via unipolar or bipolar modulation at the PWM switching frequency (typically 20-50 kHz), and the analog comparators detect AC zero-crossings for grid synchronization. The DSC performs RMS voltage and current calculations on ADC samples in real time, supporting fast transfer between mains and battery modes. The 16 KB Flash fits a small sine-table reference generator plus a state-machine UPS controller, and the -40C to +150C temperature grade supports industrial UPS enclosures with poor airflow.
Recommended
Digital Lighting Ballast (HID / LED Driver)
The DSPIC33FJ16GS502-H/SO enables digital ballasts for high-intensity discharge (HID) lamps and high-brightness LED drivers, where stable current control across varying line and temperature conditions is critical. Its PWM outputs drive the resonant inverter, while the ADC monitors lamp voltage, current, and temperature for closed-loop regulation. The DSC implements lamp warm-up, run-up, and steady-state profiles in firmware, allowing a single design to support multiple lamp types via Flash-resident parameter tables. The 28-pin SOIC fits compact ballast housings, and the -40C to +150C grade handles the elevated ambient inside enclosed luminaires. Compared with analog ballast ICs, the digital approach adds dimming, telemetry, and fault diagnostics with minimal BOM increase.
Recommended
Battery Charger with Digital Control
The DSPIC33FJ16GS502-H/SO can be used as the controller in digitally controlled battery chargers for Li-ion, lead-acid, or super-capacitor banks. Its PWMs drive a synchronous buck or boost stage that regulates charge current and voltage, while the ADC samples battery voltage, charge current, and pack temperature to implement CC/CV (constant-current / constant-voltage) profiles. The DSC can store multi-stage charge profiles in Flash, including cell-balancing algorithms for stacked battery packs. The 2 KB RAM is sufficient for ADC averaging and coulomb-counting buffers, and the JTAG interface simplifies in-the-loop tuning of the digital compensator. The -40C to +150C grade supports under-hood EV chargers and outdoor solar charge controllers.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502-H/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-E/SO | DSPIC33FJ16GS502-50I/SO |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Operating Temperature | -40C to +150C (H grade) | -40C to +125C (E grade) | -40C to +85C (I grade) |
| Maximum Clock | 50 MHz (40 MIPS) | 50 MHz (40 MIPS) - same | 50 MHz (40 MIPS) - same |
| Flash Program Memory | 16 KB | 16 KB - same | 16 KB - same |
| Data RAM | 2 KB | 2 KB - same | 2 KB - same |
| PWM Outputs | 4 outputs (up to 9 pairs) | 4 outputs (up to 9 pairs) - same | 4 outputs (up to 9 pairs) - same |
| ADC | 10-bit, 1 Msps | 10-bit, 1 Msps - same | 10-bit, 1 Msps - same |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V - same | 3.0 V to 3.6 V - same |
| Pin-compatible Drop-in | (this part) | Yes - true drop-in (same SOIC) | Yes - true drop-in (same SOIC) |
Key Differentiators
- Extended -40C to +150C operating temperature (vs DSPIC33FJ16GS502-I/MM)
- Integrated 3 analog comparators for hardware cycle-by-cycle current limiting (vs External analog comparator implementation)
- dsPIC33F DSC single-cycle MAC engine (vs General-purpose MCU without DSP engine)
Design Notes
Power the DSPIC33FJ16GS502-H/SO from a clean 3.3V rail. Place a 1uF ceramic decoupling capacitor on each of VDD1 and VDD2 as close as possible to the pins, and a separate 100 nF ceramic on AVDD. Sharing AVDD with noisy digital VDD via a ferrite bead reduces ADC noise by 1-2 LSB in SMPS layouts. Estimated: with 50 MHz operation and typical SMPS firmware, VDD current draw is 30-50 mA; verify with the actual code profile.
Keep the analog ground (AVSS) separate from the digital ground (VSS1/VSS2) and join them only at the PCB ground plane near the regulator. Route PWM traces (PWM1L/PWM1H/PWM2L/PWM2H/...) away from ADC input traces and use a ground pour to prevent switching noise coupling into current-sense signals. Place the oscillator crystal within 5 mm of OSC1/OSC2 and guard it with a ground ring.
Do not enable PWM outputs before configuring the PWM module - unmasked PWM pins can drive the half-bridge MOSFETs into shoot-through. Always set the PWM module to PWM I/O pairs in the correct order and verify dead-time. When migrating from the DSPIC33FJ16GS502-I/MM (QFN) to the DSPIC33FJ16GS502-H/SO (SOIC), confirm oscillator, MCLR, and PGEC/PGED pin assignments - the SOIC and QFN pinouts differ on these signals.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 status not explicitly qualified on the standard DSPIC33FJ16GS502-H/SO (H = high-temp grade, not automotive qualification). For AEC-Q100, contact Microchip for the automotive-qualified variant. Lead-free and halogen-free confirmed.
