DSPIC33FJ16GS502-H/MM - 16-bit DSC, 16KB Flash, 40 MIPS | Microchip
MPN: DSPIC33FJ16GS502-H/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.32 | $432.00 |
| 500 | $3.89 | $1,945.00 |
| 1,000 | $3.45 | $3,450.00 |
DSPIC33FJ16GS502-H/MM Overview
A Digital Signal Controller (DSC) is a hybrid device class that combines a microcontroller (MCU) deterministic real-time control peripheral set with a digital signal processor (DSP) computational engine. DSCs sit hierarchically between microcontrollers (simpler control) and full DSP processors (heavier signal-processing throughput), and within power management they bridge analog SMPS controllers and software-defined digital control loops. The DSPIC33FJ16GS502-H/MM is part of Microchip's SMPS-targeted dsPIC33F GS family, deliberately optimized for digital switch-mode power supply (SMPS), AC-to-DC, DC-to-DC, and Power Factor Correction (PFC) topologies.
Key features include high-speed PWM with complementary outputs and programmable dead time, high-speed 10-bit or 12-bit ADCs with multi-sample-and-hold capable of synchronizing to the PWM, fast analog comparators for cycle-by-cycle current limiting, 21 general-purpose I/O, five timers, JTAG boundary scan, and support for in-circuit and in-application programming. The -H temperature grade extends operation to 150°C junction (automotive/extended industrial grade). The QFN-28 package provides a low thermal-resistance exposed pad, allowing continuous high-current switching drive at full SMPS load.
Typical applications span digital telecom DC-DC converters, quarter-brick intermediate bus architectures, PFC boost stages, AC-DC adapters, digital lighting ballasts, and motor control. The high-speed PWM, ADC, and comparator trio is specifically arranged for multi-loop SMPS feedback, with sampling edges programmable to align with PWM edges for sub-microsecond control loop latency.
When designing, place decoupling within 6 mm of each VDD/VSS pair, route analog AVSS/AVDD separately from digital grounds, and follow Microchip's family BSDL/symbol files for JTAG chain layout. Always configure the PWM fault input and current sense comparator before enabling outputs to avoid inrush damage.
This page synthesizes distributor pricing, drop-in temperature/speed-grade alternatives, and practical PCB design notes not collected in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33FJ16GS502-H/MM — 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/MM (same form factor and footprint) — differing in ADC, Core Architecture, Maximum CPU Speed, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-I/MM
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33FJ16GS502-E/MM
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33FJ16GS502-50H/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-I/MM
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33FJ16GS502-H/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F (16-bit DSC, Harvard, DSP-enhanced) |
| Maximum CPU Speed | 40 MIPS (50 MHz max input clock) |
| Program Memory (Flash) | 16 KB (16K x 8) |
| RAM | 2 KB |
| Operating Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 21 |
| Timers | 5 |
| PWM Channels | High-Speed PWM with complementary outputs and programmable dead time |
| ADC | High-speed ADC with multi-sample/hold |
| Comparators | High-speed analog comparators for cycle-by-cycle current limit |
| Temperature Grade (H) | -40C to +150C (extended/automotive junction) |
| Package | QFN-S 28-pin, 6 x 6 mm, plastic with exposed pad |
| Mounting Type | Surface Mount |
| Debug / Programming | JTAG IEEE 1149.2 + In-Circuit Serial Programming (ICSP) |
| RoHS Status | Compliant |
DSPIC33FJ16GS502-H/MM Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input |
| Pin 2 | RA0 — Port A bit 0 / analog input |
| Pin 3 | RA1 — Port A bit 1 / analog input |
| Pin 4 | RA2 — Port A bit 2 / analog input |
| Pin 5 | RB0 — Port B bit 0 / PWM |
| Pin 6 | RB9 — Port B bit 9 / PWM |
| Pin 7 | RB10 — Port B bit 10 / PWM |
| Pin 8 | VSS1 — Digital ground |
| Pin 9 | RB1 — Port B bit 1 / PWM |
| Pin 10 | RB2 — Port B bit 2 / PWM |
| Pin 11 | RB3 — Port B bit 3 / PWM |
| Pin 12 | RB4 — Port B bit 4 / comparator input |
| Pin 13 | VDD1 — Digital supply 3.3 V |
| Pin 14 | RB8 — Port B bit 8 / PWM |
| Pin 15 | RB15 — Port B bit 15 / PWM |
| Pin 16 | RB5 — Port B bit 5 / comparator input |
| Pin 17 | RB6 — Port B bit 6 |
| Pin 18 | RB7 — Port B bit 7 |
| Pin 19 | VSS2 — Digital ground |
| Pin 20 | VDD2 — Digital supply 3.3 V |
| Pin 21 | AVSS — Analog ground |
| Pin 22 | AVDD — Analog supply 3.3 V |
| Pin 23 | RB11 — Port B bit 11 / PWM |
| Pin 24 | RB12 — Port B bit 12 / PWM |
| Pin 25 | RB13 — Port B bit 13 / PWM |
| Pin 26 | RB14 — Port B bit 14 / PWM |
| Pin 27 | OSC1 — Crystal oscillator input |
| Pin 28 | OSC2 — Crystal oscillator output |
Typical Applications
DSPIC33FJ16GS502-H/MM is suitable for 6 applications: Digital Telecom DC-DC Converter, Power Factor Correction (PFC) Boost Stage, AC-DC Adapter (Digital Controlled), Quarter-Brick Intermediate Bus Architecture (IBA) Reference, Digital Lighting Ballast / LED Driver, BLDC / PMSM Motor Drive (FOC).
Digital Telecom DC-DC Converter
The DSPIC33FJ16GS502-H/MM's 40 MIPS dsPIC33F core executes continuous conduction mode (CCM) voltage-mode and average-current-mode control loops at 100-500 kHz switching frequencies commonly used in 48 V telecom intermediate bus architectures. The high-speed PWM with programmable dead time drives synchronous buck half-bridges with sub-100 ns resolution, and the 16-bit DSP engine runs type-II/III compensation networks without integer-overflow penalty. Placed between the 48 V input rail and downstream POL converters, the -H temperature grade sustains operation in fanless sealed bricks where ambient temperatures exceed 100°C. Pin-compatible migration to the DSPIC33FJ16GS502-50H/MM doubles CPU headroom if compensation math tightens.
Recommended
Power Factor Correction (PFC) Boost Stage
Average-current-mode PFC requires the controller to multiply input voltage and current samples, compute the reference current, and modulate a boost switch at 50-100 kHz - all within one switching period. The DSPIC33FJ16GS502-H/MM's high-speed ADC with multi-sample-and-hold can sample inductor current and rectified line voltage at the PWM midpoint, eliminating edge-noise artifacts, and the analog comparator provides cycle-by-cycle overcurrent protection to satisfy IEC 61000-3-2 stress tests. The 16-bit MAC executes the sinusoidal reference multiply in single cycles, keeping THD below 5% at full load. -H grade supports the high thermal load of fanless 1-3 kW PFC stages.
Recommended
AC-DC Adapter (Digital Controlled)
Replacing legacy analog controllers like the UCC28C42 with the DSPIC33FJ16GS502-H/MM enables firmware-defined soft-start, constant-current/constant-voltage (CC/CV) charging profiles, and adaptive valley skipping for light-load efficiency. The integrated 16-bit ADC samples output voltage and primary-side auxiliary winding simultaneously, while the high-speed comparator forces peak-current-mode transitions with deterministic timing. The 150°C junction rating supports the high internal ambient of enclosed adapters running at high line and full load. Pin-compatible DSPIC33FJ16GS502-I/MM can drop in for cost-sensitive consumer adapters.
Recommended
Quarter-Brick Intermediate Bus Architecture (IBA) Reference
Microchip's published reference design for high-density quarter-brick DC-DC converters uses the DSPIC33FJ16GS502 family as the digital controller of the intermediate bus architecture (IBA), converting 48 V to 12 V at 30-40 A for downstream POL converters. The DSP engine runs DSP-based voltage-mode control with feed-forward, maintaining regulation across load steps despite IBA's narrow input range. The QFN-28 6x6 mm with exposed pad dissipates switching node losses into the inner copper layers, allowing 96% peak efficiency in a quarter-brick footprint. -H grade supports 70°C inlet / 95°C brick baseplate operation.
Recommended
Digital Lighting Ballast / LED Driver
Programmable LED drivers using the DSPIC33FJ16GS502-H/MM can implement dimming curves (0-10 V, DALI, DMX) and constant-current regulation with the high-speed PWM driving a boost or buck topology. The 16-bit DSP performs logarithmic dimming math and color-mixing calculations for tunable-white or RGB fixtures, and the analog comparator protects against open-LED overvoltage. -H grade fits sealed high-bay industrial fixtures where the ballast compartment sees sustained 100°C+ ambient. Pin-compatible DSPIC33FJ16GS402-I/MM offers lower-cost entry for residential luminaires.
Recommended
BLDC / PMSM Motor Drive (FOC)
Field-oriented control of BLDC/PMSM motors requires Clarke/Park transforms, inverse transforms, and an inverse-Park-modulated SVM output every PWM period - exactly the workload the dsPIC33F core is built for. The DSPIC33FJ16GS502-H/MM's 40 MIPS can drive sensorless FOC at 20 kHz PWM for small industrial pumps, fans, and e-mobility auxiliaries. The high-speed ADC samples two phase currents simultaneously, and the on-chip analog comparator provides hardware overcurrent protection independent of CPU latency. -H grade tolerates the high ambient of integrated motor/inverter enclosures.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502-H/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-I/MM | DSPIC33FJ16GS502-E/MM | DSPIC33FJ16GS502-50H/MM | DSPIC33FJ16GS402-I/MM |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 6x6 mm (MM) | QFN-28 6x6 mm (MM) - same | QFN-28 6x6 mm (MM) - same | QFN-28 6x6 mm (MM) - same | QFN-28 6x6 mm (MM) - same |
| Flash / RAM | 16 KB / 2 KB | 16 KB / 2 KB | 16 KB / 2 KB | 16 KB / 2 KB | 16 KB / 2 KB (GS402 family) |
| Maximum CPU Speed | 40 MIPS (50 MHz max input) | 40 MIPS (50 MHz max input) | 40 MIPS (50 MHz max input) | 40 MIPS (50 MHz, 50 MHz speed grade) | 40 MIPS (50 MHz) |
| Temperature Grade | -40C to +150C (H grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +150C (H grade) | -40C to +85C (I grade) |
| I/O Pins | 21 | 21 | 21 | 21 | 21 (GS402 family) |
| 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 |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Extended / automotive 150°C junction temperature grade (vs DSPIC33FJ16GS502-I/MM)
- Higher speed grade option (50 MHz) in same footprint (vs DSPIC33FJ16GS502-E/MM)
- Optimized SMPS peripheral set (PWM + ADC + comparator) (vs DSPIC33FJ16GS402-I/MM (GS402 family))
Design Notes
Place a 10 uF bulk + 0.1 uF ceramic decoupling capacitor pair within 6 mm of each VDD/VSS pin pair (1, 19/8, 13, 20), per the Microchip dsPIC33FJ16GS502 family datasheet. Use a separate ferrite bead between digital VDD and analog AVDD, and decouple AVSS/AVDD with their own 0.1 uF + 10 uF pair. AVDD must not exceed VDD by more than 0.3 V at any time to avoid latch-up.
Route PWM outputs and gate-drive traces away from analog sense traces; keep at least 3 mm spacing or use a guard ground trace between high-dV/dt PWM nodes and current-sense amplifier outputs. The QFN-28 exposed pad must be soldered to a continuous ground plane with at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch) to the inner ground layer to keep junction temperature below 150°C under continuous high-side switching.
Use the high-speed ADC in tandem with the PWM module by triggering ADC conversion at the PWM midpoint (rather than at the PWM edge) to avoid sampling during MOSFET switching transitions. For cycle-by-cycle current limiting, configure one of the on-chip analog comparators to drive the PWM fault input directly - this guarantees hardware shutdown within one PWM cycle independent of CPU latency, satisfying SMPS safety requirements.
Do not leave unused comparator inputs floating - tie them to AVSS or a defined voltage, or the comparator may oscillate and inject noise into the ADC. Configure the JTAG/enable pins via the configuration bits at programming time, not at runtime, to avoid unintended resets. Always enable the watchdog timer in safety-critical SMPS firmware so a runaway control loop self-recovers within milliseconds.
Compliance Information
RoHS-compliant per Microchip product page; H temperature grade supports -40C to +150C junction operation but the part is not formally AEC-Q100 qualified - consult Microchip automotive part numbers for AEC-Q100 needs.
