DSPIC33FJ16GS402-I/MM - 16-bit SMPS DSC, 40 MIPS, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS402-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.71 | $37.10 |
| 100 | $3.29 | $329.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
DSPIC33FJ16GS402-I/MM Overview
A Digital Signal Controller combines a microcontroller with a DSP engine on a single die. The dsPIC33F GS variants add high-resolution PWM, fast ADC, and analog comparators specifically to support AC/DC converters, DC/DC converters, power factor correction (PFC), uninterruptible power supplies (UPS), and digital lighting ballasts. By collapsing the analog control loop into firmware, the designer gains flexibility, programmability, and active tuning over the converter's operating region. The DSPIC33FJ16GS402-I/MM belongs to the power management and digital control IC hierarchy: dsPIC33F -> 16-bit DSC -> microcontroller/DSP hybrid -> embedded controller.
Key features include 4 PWM channels with high resolution, 10-bit ADC with multiple S&H, dedicated analog comparators for cycle-by-cycle current limiting, a fixed-point DSP engine with barrel shifter, and boundary-scan support (JTAG). CMOS process technology keeps active current low and provides idle and sleep modes for energy-conscious designs. The 16-bit DSC architecture delivers deterministic control loop timing needed for high-frequency SMPS loops (often 100 kHz to 1 MHz switching).
Architecturally, the device pairs a modified Harvard bus to a DSP engine that natively supports MAC operations on 16-bit data, enabling on-the-fly filtering and control law execution inside the PWM interrupt service routine. Boundary scan (IEEE 1149.1) aids board-level testing. The flash program memory supports self-programming, allowing in-field firmware updates for adaptive power-supply tuning.
Typical applications include AC/DC and DC/DC converters, Power Factor Correction (PFC) front ends, UPS systems, solar micro-inverters, digital lighting ballasts, and motor control for small BLDC/PMSM drives. Industrial and consumer SMPS designs benefit from its digital-loop flexibility.
When designing with this device, allocate the ICSP pins (PGECx/PGEDx) to a header for in-circuit debug and programming. Use one pair as a matched set; mixing PGEC2 with PGED1 will not function. Add bulk and decoupling capacitance near VDD/VSS pairs and route the analog AVSS separately from digital grounds.
This page synthesizes distributor pricing, drop-in alternatives within the same 28-pin QFN footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33FJ16GS402-I/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 DSPIC33FJ16GS402-I/MM (same form factor and footprint) — differing in Package, Core Architecture, ADC, Analog Comparators, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS402-50I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-E/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-H/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402T-50I/MM
✅ Drop-In✓ In Stock
$3.45 / Unit
View Datasheet →DSPIC33FJ16GS402-50I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →DSPIC33FJ06GS101-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ06GS202-I/MM
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33FJ16GS402-I/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (modified Harvard, DSP engine + MCU) |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 2 KB |
| Maximum CPU Speed | 40 MIPS (MIPS) |
| Clock Speed | 40 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Ports | 21 |
| PWM Channels | 4 (high-speed, dedicated for SMPS) |
| ADC | 10-bit, multi-channel with S&H |
| Analog Comparators | Yes (dedicated, for cycle-by-cycle current limit) |
| ROM Type | Flash |
| Technology | CMOS |
| Boundary Scan | Supported (JTAG/IEEE 1149.1) |
| Barrel Shifter | Yes (fixed-point architecture) |
| Operating Temperature | -40C to +85C (industrial, "I" grade) |
| Package | 28-pin QFN (MM), 6 x 6 mm, 0.90 mm height |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020, reflow 260C) |
| RoHS Status | Compliant |
DSPIC33FJ16GS402-I/MM Pin Configuration
| Pin 1 | RP5/PMD5/IC4/RB5 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 2 | RP6/PMD6/IC5/RB6 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 3 | RP7/PMD7/IC6/RB7 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 4 | RP8/PMD8/IC7/RB8 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 5 | VSS — Digital ground reference |
| Pin 6 | OSCI/CLKI/RA2 — External oscillator input or GPIO |
| Pin 7 | OSCO/CLKO/RA3 — External oscillator output or GPIO |
| Pin 8 | RP9/PMD9/IC8/RB9 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 9 | RP10/PMD10/IC9/RB10 — Remappable peripheral pin / PWM / input capture / GPIO |
| Pin 10 | RP11/PMD11/RA4 — Remappable peripheral pin / PWM / GPIO |
| Pin 11 | VSS — Digital ground reference |
| Pin 12 | VDD — Digital supply voltage (3.0V - 3.6V) |
| Pin 13 | AVSS — Analog ground reference |
| Pin 14 | AVDD — Analog supply voltage (3.0V - 3.6V) |
| Pin 15 | PWM1H/RE0 — PWM channel 1 high-side output or GPIO |
| Pin 16 | PWM1L/RE1 — PWM channel 1 low-side output or GPIO |
| Pin 17 | PWM2H/RE2 — PWM channel 2 high-side output or GPIO |
| Pin 18 | PWM2L/RE3 — PWM channel 2 low-side output or GPIO |
| Pin 19 | PWM3H/RE4 — PWM channel 3 high-side output or GPIO |
| Pin 20 | PWM3L/RE5 — PWM channel 3 low-side output or GPIO |
| Pin 21 | FLT32/RF0 — PWM fault input or GPIO |
| Pin 22 | PWM4H/RF1 — PWM channel 4 high-side output or GPIO |
| Pin 23 | PWM4L/RF2 — PWM channel 4 low-side output or GPIO |
| Pin 24 | FLT4/RF3 — PWM fault input or GPIO |
| Pin 25 | PGEC1/AN1/RA1 — ICSP clock / analog input / GPIO |
| Pin 26 | PGED1/AN0/RA0 — ICSP data / analog input / GPIO |
| Pin 27 | PGEC2/RP12/RC12 — Alternate ICSP clock / remappable peripheral / GPIO |
| Pin 28 | PGED2/RP13/RC13 — Alternate ICSP data / remappable peripheral / GPIO |
Typical Applications
DSPIC33FJ16GS402-I/MM is suitable for 6 applications: AC/DC Power Converter Control, Power Factor Correction (PFC) Front End, Uninterruptible Power Supply (UPS) Controller, Solar Micro-Inverter / Photovoltaic Optimizer, Digital Lighting Ballast / LED Driver, Small BLDC / PMSM Motor Drive.
AC/DC Power Converter Control
The DSPIC33FJ16GS402-I/MM is engineered for AC/DC converter digital control loops. Its 40 MIPS core and dedicated high-speed PWM channels execute average-current-mode control inside the PWM ISR at switching frequencies up to ~500 kHz. The on-chip 10-bit ADC with simultaneous sample-and-hold captures both input voltage and inductor current in the same switching cycle, and the analog comparators deliver hardware cycle-by-cycle over-current protection that bypasses software latency. The 16 KB Flash fits a complete PFC + DC/DC state machine, including soft-start, AC-line drop-out recovery, and I2C/UART telemetry. Designers gain active power-factor tuning and in-field firmware updates that analog controllers cannot match.
Recommended
Power Factor Correction (PFC) Front End
PFC front ends for 100 W to 1 kW SMPS need deterministic control-loop timing that the DSPIC33FJ16GS402-I/MM provides at 40 MIPS. Its dedicated PWM module generates the boost-switch gate drive with programmable dead-time, while the analog comparators sense the MOSFET current for cycle-by-cycle limit, eliminating the need for an external current-sense comparator. The 10-bit ADC samples rectified line voltage and inductor current for average-current-mode control, and the 16 KB Flash accommodates the digital PI loop, soft-start ramp, brown-out recovery, and PMBus/I2C housekeeping. Compared to legacy analog PFC controllers (UC3854, NCP1654), this DSC enables tuning over temperature, load, and line without component swaps.
Recommended
Uninterruptible Power Supply (UPS) Controller
Line-interactive and online UPS topologies benefit from the DSPIC33FJ16GS402-I/MM's 40 MIPS throughput and SMPS-optimized PWM. The four PWM channels drive the inverter H-bridge and the battery-side buck/boost charger from a single IC, while the 10-bit ADC samples battery voltage, load current, and line voltage simultaneously. The 16 KB Flash accommodates line-fail detection, transfer-switch sequencing, sine-PWM generation with lookup tables, and RS-232/USB telemetry. The analog comparators provide hardware battery over-current protection that triggers independently of firmware. Industrial-grade temperature rating (-40C to +85C) covers server-room and telecom-cabinet environments.
Recommended
Solar Micro-Inverter / Photovoltaic Optimizer
For sub-300 W micro-inverters and module-level PV optimizers, the DSPIC33FJ16GS402-I/MM is well-matched. Its high-speed PWM drives the high-frequency isolation stage, the analog comparators enforce cycle-by-cycle current limit, and the 10-bit ADC tracks panel voltage/current for MPPT plus the grid-side voltage/current for anti-islanding. The 16 KB Flash accommodates perturb-and-observe MPPT, grid-synchronization PLL, anti-islanding protection per UL1741, and I2C telemetry. Industrial temperature rating and CMOS low-power modes extend operating life in outdoor enclosures, while boundary-scan (JTAG) simplifies production board test of these safety-critical designs.
Recommended
Digital Lighting Ballast / LED Driver
The DSPIC33FJ16GS402-I/MM is a strong fit for programmable digital ballasts driving high-intensity-discharge (HID) lamps and high-power LED arrays. Its 40 MIPS core executes lamp-startup sequencing, dimming curves, and fault diagnostics that legacy analog ballasts cannot offer. Four PWM channels drive the resonant half-bridge or buck/boost LED driver and provide analog-style dimming via duty-ratio modulation. The 10-bit ADC monitors lamp voltage/current for closed-loop regulation, and the analog comparators deliver hardware over-current/over-voltage protection. Boundary-scan aids production testing of these high-volume designs.
Recommended
Small BLDC / PMSM Motor Drive
Although targeted at SMPS, the DSPIC33FJ16GS402-I/MM's PWM, ADC, and comparator set also support small sensorless BLDC/PMSM drives up to a few hundred watts (fans, pumps, appliances). Its high-speed PWM generates the six-step or space-vector commutation signals, the 10-bit ADC samples back-EMF for sensorless commutation, and the analog comparators protect against shoot-through and over-current. The 16 KB Flash fits a sensorless start-up routine plus a PI speed loop. Designers already familiar with the dsPIC33F family can reuse MPLAB X IDE projects and motor-control libraries when migrating to this 28-pin QFN variant.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS402-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS402-50I/MM | DSPIC33FJ16GS402-E/MM | DSPIC33FJ16GS402-H/MM | DSPIC33FJ16GS402T-50I/MM | DSPIC33FJ16GS402-50I/SP | DSPIC33FJ06GS101-I/MM | DSPIC33FJ06GS202-I/MM |
|---|---|---|---|---|---|---|---|---|
| Package | QFN-28 (MM), 6x6 mm | QFN-28 (MM) - same | QFN-28 (MM) - same | QFN-28 (MM) - same | QFN-28 (MM) - same | SPDIP-28 (SP) - through-hole | QFN-28 (MM) - same | QFN-28 (MM) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 6 KB (-62.5%) | 6 KB (-62.5%) |
| MIPS (max) | 40 MIPS | 50 MIPS (+25%) | 40 MIPS | 40 MIPS | 50 MIPS (+25%) | 50 MIPS (+25%) | 40 MIPS | 40 MIPS |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +125C (high temp) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| I/O Pins | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Supply Voltage | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| PWM Channels | 4 (dedicated SMPS) | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Key Differentiators
- More Flash than -GS101/-GS202 siblings in the same footprint (vs DSPIC33FJ06GS101-I/MM)
- Industrial temperature grade as standard (vs DSPIC33FJ16GS402-H/MM)
- Higher MIPS than legacy dsPIC30F family at same price tier (vs DSPIC30F series (e.g. DSPIC30F2010))
Design Notes
Place 100 nF decoupling capacitors as close as possible to every VDD/VSS pin pair on the 28-pin QFN, plus a bulk 10 uF ceramic on each of VDD and AVDD. Route AVDD through a ferrite bead from VDD and place a separate 100 nF + 10 uF on AVDD to keep digital switching noise out of the ADC reference. The 10-bit ADC's absolute accuracy depends on clean analog supply - measured SNR can degrade 6 to 10 dB if AVDD is not properly filtered.
The ICSP programming pins (PGECx/PGEDx) must be used as matched pairs. PGEC2/PGED2 and PGEC1/PGED1 cannot be mixed - if PGEC2 is used for ICSPCLK, ICSPDAT must be connected to PGED2. Also leave the unused pair floating or pulled to a defined logic level; leaving both pairs high-impedance can cause programming failures on some debug probes.
Expose the central thermal pad of the 28-pin QFN (MM) on the PCB and stitch it to a ground copper pour with at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch). The exposed pad is the primary heat dissipation path for the 40 MIPS core under sustained PWM and ADC activity. Without proper thermal stitching, junction temperature can rise 15 to 20 C above ambient and reduce long-term reliability.
Route analog signals (AN0/AN1, comparator inputs) on a separate layer or keep them isolated from the PWM output traces. The high-speed PWM1H/PWM1L edges have 1 to 2 ns rise times and can couple 50 mV+ noise into adjacent analog traces, which is significant relative to the 10-bit ADC's ~3 mV LSB at 3.3V. Add a ground guard ring around sensitive analog pins and place the analog ground (AVSS) star-connected to the digital ground at a single point near the QFN exposed pad.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 not qualified - this is an industrial-grade part. Halogen-free status not explicitly confirmed in the verified web data and marked unknown per data authenticity rules.
