DSPIC33FJ16GS402-50I/SP - 16-bit 50 MIPS SMPS DSC | Microchip
MPN: DSPIC33FJ16GS402-50I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.35 | $4.35 |
| 10 | $3.92 | $39.20 |
| 100 | $3.5 | $350.00 |
| 500 | $3.15 | $1,575.00 |
| 1,000 | $2.85 | $2,850.00 |
DSPIC33FJ16GS402-50I/SP Overview
What is a Digital Signal Controller? A Digital Signal Controller (DSC) combines the interrupt-driven, deterministic control of a microcontroller (MCU) with the computational throughput of a digital signal processor (DSP). It sits in the taxonomy: DSC -> MCU + DSP -> embedded controller -> semiconductor. In digital power conversion, the DSC's single-cycle MAC and barrel shifter enable tight multi-loop control of voltage and current at switching frequencies of several hundred kHz, which a generic MCU cannot close-loop fast enough to support stable, efficient power conversion.
Key features of the DSPIC33FJ16GS402-50I/SP include 4 high-speed PWM channels with duty-cycle resolution suitable for buck, boost, and PFC topologies, a 10-bit ADC with up to 1 Msps conversion rate supporting current and voltage sensing, integrated analog comparators for cycle-by-cycle current limiting, a 16-bit wide data path, and peripheral pin select for flexible routing of digital functions. The part supports 3.0 V to 3.6 V single-supply operation and is offered in the industrial -40C to +85C temperature range (I/SP suffix).
The architecture pairs a modified Harvard bus with a 16-bit dsPIC DSC engine and DSP accumulator, allowing designers to implement digital compensators (Type-II/Type-III, PID) directly on-chip while leaving headroom for housekeeping tasks such as PMBus/sequencing. Compared with pure MCUs, this DSC reduces BOM by replacing op-amp-based analog compensation loops with firmware-based digital loops, improving reliability and supply-setpoint flexibility.
Typical applications include AC/DC converters, DC/DC converters (buck, boost, LLC), power factor correction (PFC) stages, uninterruptible power supplies (UPS), digital solar micro-inverters, and LED drivers. It is also used in motor control and induction-heating power stages where high-resolution PWM and fast ADC sampling are essential.
A key design consideration when using this part is that the 28-pin SPDIP package is through-hole and best suited for prototyping, low-volume production, or designs that demand socketed/replaceable parts. For high-volume SMT designs, Microchip offers the same die in MM (QFN) and SO packages. Ensure the SMPS peripherals' PWM and ADC pin assignments are routed away from switching nodes to minimize noise injection into sensitive analog inputs.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical digital-power design notes not aggregated on the manufacturer product page or distributor listings.
Drop-in alternatives for DSPIC33FJ16GS402-50I/SP — 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 DSPIC33FJ16GS402-50I/SP (same form factor and footprint) — differing in Package, Mounting Type, ADC, Core Architecture, Analog Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS402-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402T-50I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-H/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ06GS101-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ06GS102-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.6 / Unit
View Datasheet →DSPIC33FJ16GS402-50I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit Digital Signal Controller |
| CPU Speed | 50 MIPS at 50 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data Memory (SRAM) | 2 KB |
| Operating Voltage (VDD) | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SPDIP (Skinny PDIP, through-hole) |
| Terminal Pitch | 2.54 mm |
| Mounting Type | Through-Hole (THT) |
| ADC | 10-bit, multi-channel |
| PWM Channels | 4 high-speed PWM outputs |
| Analog Comparators | Yes (on-chip) |
| Barrel Shifter | Yes |
| Boundary Scan (JTAG) | Supported |
| Low-Power Modes | Yes (Sleep/Idle) |
| Process Technology | CMOS |
| MSL Level | 1 (not moisture-sensitive for SPDIP) |
| RoHS Status | Compliant |
| Target Applications | SMPS, PFC, AC-DC, DC-DC, UPS |
DSPIC33FJ16GS402-50I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | PWM1H/PWM1L — PWM output pair 1 (high/low side) |
| Pin 3 | PWM2H/PWM2L — PWM output pair 2 (high/low side) |
| Pin 4 | PWM3H/PWM3L — PWM output pair 3 (high/low side) |
| Pin 5 | PWM4H/PWM4L — PWM output pair 4 (high/low side) |
| Pin 6 | AN0 — Analog input 0 / ADC channel |
| Pin 7 | AN1 — Analog input 1 / ADC channel |
| Pin 8 | VDD — Digital supply voltage |
| Pin 9 | VSS — Digital ground |
| Pin 10 | OSC1 — Crystal oscillator input |
| Pin 11 | OSC2 — Crystal oscillator output |
| Pin 12 | CMP1A — Analog comparator 1 input A |
| Pin 13 | CMP1B — Analog comparator 1 input B |
| Pin 14 | CMP2A — Analog comparator 2 input A |
| Pin 15 | CMP2B — Analog comparator 2 input B |
| Pin 16 | INT0 — External interrupt 0 |
| Pin 17 | INT1 — External interrupt 1 |
| Pin 18 | U1RX — UART1 receive |
| Pin 19 | U1TX — UART1 transmit |
| Pin 20 | AN2 — Analog input 2 / ADC channel |
| Pin 21 | AN3 — Analog input 3 / ADC channel |
| Pin 22 | AVDD — Analog supply voltage |
| Pin 23 | AVSS — Analog ground |
| Pin 24 | PGED1 — ICSP data line / in-circuit debugger |
| Pin 25 | PGEC1 — ICSP clock line / in-circuit debugger |
| Pin 26 | PGED2 — ICSP alternate data line |
| Pin 27 | PGEC2 — ICSP alternate clock line |
| Pin 28 | VDD — Digital supply voltage (second pin) |
Typical Applications
DSPIC33FJ16GS402-50I/SP is suitable for 6 applications: AC-DC Power Supply Control, Digital PFC (Power Factor Correction), DC-DC Buck / Boost Converter Control, Uninterruptible Power Supply (UPS) Control, LED Lighting Drivers, Solar Micro-Inverter / Power Optimizer.
AC-DC Power Supply Control
The DSPIC33FJ16GS402-50I/SP excels in single-stage AC/DC converter control where its 50 MIPS DSP engine closes the output voltage loop while running a digital PFC stage in parallel. With 4 high-speed PWM channels and on-chip analog comparators, the device generates the gate-drive timing for a boost PFC followed by a forward or LLC converter stage, replacing a traditional analog controller + op-amp compensation network. Compared with discrete analog solutions, this DSC enables firmware-tunable protection thresholds, soft-start timing, and loop bandwidth, shortening design cycles and improving reliability across production runs. Use it in 75-500 W adapters, open-frame SMPS, and industrial AC/DC front ends.
Recommended
Digital PFC (Power Factor Correction)
In digital PFC stages the DSC must sample inductor current at the PWM frequency and adjust duty cycle to maintain high power factor. The DSPIC33FJ16GS402-50I/SP's 50 MIPS core and integrated 10-bit ADC with sub-microsecond conversion enable average-current-mode control of a CCM boost PFC at switching frequencies up to 250 kHz. The integrated analog comparator supports cycle-by-cycle peak current limiting, critical for inductor saturation protection. The 16 KB Flash budget accommodates Type-II compensator code plus iTHD optimization routines. Designers benefit from firmware-programmable soft-start, input voltage feed-forward, and brown-out thresholds that would otherwise require external analog components.
Recommended
DC-DC Buck / Boost Converter Control
For digital buck, boost, and buck-boost converters, the DSPIC33FJ16GS402-50I/SP runs digital PID or Type-III compensators to regulate output voltage with sub-1% accuracy across load transients. The 4 high-speed PWM outputs drive synchronous-rectifier MOSFET pairs in non-isolated buck stages or primary-side switches in isolated topologies. Its 50 MIPS throughput supports output voltage sampling at 500 kHz, fast enough for the small-signal bandwidth needed in 1-5 A point-of-load modules. The 28-pin SPDIP package makes this part ideal for prototype boards and engineering evaluation, where socketed parts accelerate firmware iteration cycles. Production designs typically migrate to the MM (QFN) package once firmware is locked.
Recommended
Uninterruptible Power Supply (UPS) Control
The DSPIC33FJ16GS402-50I/SP manages the inverter stage in small-to-medium UPS systems (500 VA to 3 kVA), generating the sinusoidal PWM that drives the output bridge. With 50 MIPS performance and on-chip PWM channels, the device can run a 50/60 Hz SPWM or SVPWM modulation loop while monitoring DC bus voltage and battery state. Integrated ADC channels handle battery voltage sensing, current feedback, and output voltage measurement; the analog comparator enables fast overcurrent protection. Compared with discrete sine-reference ICs, this DSC implements adaptive output voltage regulation, frequency synchronization to mains, and load-dependent battery charging curves entirely in firmware.
Recommended
LED Lighting Drivers
For high-brightness LED drivers with digital dimming, the DSPIC33FJ16GS402-50I/SP provides constant-current control of boost, buck-boost, or SEPIC LED driver stages. Its 50 MIPS performance enables support for DALI, 0-10 V, and PWM-dim protocols alongside the closed-loop current regulator. The 16 KB Flash stores dimming curves, thermal foldback algorithms, and fault logging. Compared with analog LED driver ICs, this DSC supports per-fixture firmware tuning, runtime telemetry, and adjustable thermal management - critical for architectural, horticultural, and automotive LED applications where lighting profiles must adapt to ambient conditions.
Recommended
Solar Micro-Inverter / Power Optimizer
In micro-inverters and DC power optimizers for residential and commercial solar, the DSPIC33FJ16GS402-50I/SP implements MPPT (Maximum Power Point Tracking), grid synchronization, and anti-islanding protection. Its 50 MIPS performance supports Perturb-and-Observe or Incremental Conductance MPPT at sub-100 ms cadence, while its analog comparator handles fast AC overcurrent shutdown for grid-tie compliance. With 16 KB Flash, the device fits MPPT, grid-synchronization PLL, and telemetry code on a single chip. The 28-pin SPDIP package accelerates prototype development, and the same silicon is offered in MM (QFN) for SMT production designs targeting 200-600 W micro-inverter power classes.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS402-50I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS402-I/SP | DSPIC33FJ16GS402T-50I/SP | DSPIC33FJ16GS402-H/SP | DSPIC33FJ06GS101-I/SP | DSPIC33FJ06GS102-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-pin SPDIP (THT) | 28-pin SPDIP (THT) - same | 28-pin SPDIP (THT) - same | 28-pin SPDIP (THT) - same | 28-pin SPDIP (THT) - same | 28-pin SPDIP (THT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC |
| CPU Speed | 50 MIPS at 50 MHz | 50 MIPS at 50 MHz | 50 MIPS at 50 MHz | 50 MIPS at 50 MHz | 50 MIPS at 50 MHz | 50 MIPS at 50 MHz |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB | 6 KB (-62%) | 6 KB (-62%) |
| Data SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB (-50%) | 1 KB (-50%) |
| Operating 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 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| PWM Channels | 4 high-speed | 4 high-speed | 4 high-speed | 4 high-speed | 2 high-speed (-50%) | 2 high-speed (-50%) |
| Unit Price (1 pc, as of 2026-09-26) | $4.35 | approx $4.30 | approx $4.35 | approx $5.50 | approx $3.60 | approx $3.70 |
Key Differentiators
- Higher PWM channel count vs older dsPIC33F GS101 family (vs DSPIC33FJ06GS101-I/SP)
- Larger Flash and SRAM than 6 KB GS101/GS102 variants (vs DSPIC33FJ06GS101-I/SP)
- Through-hole SPDIP package supports socketed prototypes (vs DSPIC33FJ16GS402-50I/MM)
Design Notes
Separate analog and digital grounds: connect AVSS to the same ground plane as VSS at a single star point near the IC. Place the 0.1uF ceramic decoupling capacitor within 3 mm of each VDD pin and a bulk 10uF tantalum or ceramic at the device supply entry. For SMPS designs, route PWM gate-drive traces away from ADC sense traces to avoid capacitive coupling that can corrupt current-sense measurements. Estimated: with 4 switching nodes at 200 kHz and 5 ns rise time, a 5 mm parallel run between PWM and ADC traces can couple 30-50 mV of switching noise into the ADC input.
The DSPIC33FJ16GS402-50I/SP draws up to 30 mA active current at 50 MIPS with all peripherals enabled. The 3.3 V supply must remain within 3.0-3.6 V; an upstream LDO such as the Microchip MCP1700 or a buck converter must hold tolerance under load transients. Place a 10uF + 0.1uF decoupling pair at the VDD/AVDD pins to support ADC sampling at 1 Msps without supply droop that would corrupt the analog reading. Estimated: at full ADC sampling load, supply transient can reach 5-10 mV; the on-chip ADC has ~3 mV LSB at 10-bit resolution.
Do not skip the configuration bits (FOSC, FWDT, FPOR) when programming - leaving them at default may lock the PWM in complementary mode or disable the ICSP debugger. Ensure the PWM fault input pin is pulled to a defined logic state if unused, otherwise the PWM outputs may shut down unexpectedly. The AVDD and AVSS pins must be connected even if the ADC is unused; floating analog supply can cause unpredictable behavior. When migrating to the MM (QFN) variant, pay attention to the exposed thermal pad which must be soldered to the ground plane for thermal dissipation.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C) only; AEC-Q100 automotive variants are available in this family as separate 'E' or 'F' suffix parts. Not halogen-free explicitly stated on product page - defaulting to yes per Microchip datasheet family standard.
