DSPIC33FJ16GS404-50I/ML - 50 MIPS 16-bit DSC SMPS MCU | Microchip
MPN: DSPIC33FJ16GS404-50I/ML ✓ Hoạt độngDSPIC33FJ16GS404-50I/ML Tóm tắt
A dsPIC33F DSC combines a modified Harvard RISC architecture with a single-cycle MAC (multiply-accumulate) engine, a 40-bit accumulator, and dual 40-bit accumulators for high-precision digital control loops. The "GS" family designation indicates SMPS-optimized peripherals: high-speed PWM modules (typically capable of >1 ns PWM resolution with 1.04 ns PWM duty cycle granularity), high-speed 10-bit or 12-bit ADCs with dedicated Sample-and-Hold and conversion rates up to 4 MSPS (peripheral-dependent), and analog comparators with DAC references for peak-current-mode control. This makes the GS family ideal for implementing digital compensators, digital average-current-mode controllers, and PFC (Power Factor Correction) loops without external DSP ICs.
Key features include 50 MHz operation, 16 KB Flash, 2 KB RAM, integrated SMPS-optimized PWM with complementary outputs and programmable dead time, fast ADC with up to 4 MSPS throughput, 5V-tolerant digital I/O, and multiple communication peripherals (UART, SPI, I2C). The "-50I" suffix denotes the 50 MIPS speed grade and the industrial temperature range (-40C to +85C), while the "/ML" suffix denotes the 44-pin QFN-EP (8x8 mm) package with exposed thermal pad.
Typical applications include digitally controlled AC/DC converters, isolated DC/DC modules, telecom bricks, solar micro-inverters, LED drivers, induction heating controllers, and Class-D audio amplifiers. The combination of DSP throughput and MCU-style peripherals eliminates the need for a separate DSP + MCU pair, reducing BOM cost and PCB area. The QFN-EP package provides a low thermal resistance path to PCB copper, essential for industrial-grade digital power designs operating at extended temperatures.
Design considerations include proper exposed-pad soldering for thermal dissipation, decoupling capacitor placement adjacent to each VDD/VSS pair, and careful PCB layout to separate analog and digital grounds. The MPLAB XC16 compiler and MPLAB X IDE/MCC code configurator fully support this device, simplifying firmware development. According to the Microchip datasheet for the dsPIC33FJ16GS404 family, the device integrates 4 PWM channels and 9 ADC input channels in this 44-pin QFN variant.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineering context beyond raw parametric data.
Bộ thay thế dễ dàng lắp đặt cho DSPIC33FJ16GS404-50I/ML — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với DSPIC33FJ16GS404-50I/ML (cùng hình factor và footprint) — khác nhau ở ADC, Core Architecture, Package, PWM Channels, Operating Temperature.
DSPIC33FJ16GS404T-50I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →DSPIC33FJ16GS404-50I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →DSPIC33FJ16GS402-50I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →DSPIC33FJ16GS504-50I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →DSPIC33FJ16GS402-I/MM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →DSPIC33FJ16GS404-50I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | dsPIC33F 16-bit modified Harvard RISC + DSP engine |
| Maximum CPU Speed | 50 MIPS (50 MHz) |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data RAM | 2 KB (2048 words) |
| Supply Voltage (VDD) | 3.0 V to 3.6 V (3.3 V typical) |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Package Type | 44-pin QFN-EP (8x8 mm) with exposed pad |
| JESD-30 Package Code | S-PQCC-N44 (Square Plastic Leaded Chip Carrier) |
| Kiểu lắp đặt | Surface Mount |
| ADC | 10-bit, up to 4 MSPS, 9 input channels |
| PWM Channels | 4 SMPS-optimized PWM outputs with complementary mode and dead time |
| Communication Peripherals | UART, SPI, I2C |
| Process Technology | CMOS |
| Speed Grade Suffix | -50I = 50 MIPS + Industrial temp range |
| Trạng thái RoHS | Compliant |
| Tube Pack Quantity (Factory Pack) | 40 |
Cấu hình chân DSPIC33FJ16GS404-50I/ML
| Chân 1 | RP15/PWM3H/PMD15/RB15 — Remappable I/O / PWM3H output / PMDATA bit |
| Chân 2 | RP14/PWM3L/PMD14/RB14 — Remappable I/O / PWM3L output |
| Chân 3 | RP13/AN11/RB13 — Remappable I/O / analog input |
| Chân 4 | RP12/AN10/RB12 — Remappable I/O / analog input |
| Chân 5 | RP11/AN9/RB11 — Remappable I/O / analog input |
| Chân 6 | RP10/AN8/RB10 — Remappable I/O / analog input |
| Chân 7 | RP9/AN7/RB9 — Remappable I/O / analog input |
| Chân 8 | RP8/AN6/RB8 — Remappable I/O / analog input |
| Chân 9 | RP7/AN5/RC1 — Remappable I/O / analog input |
| Chân 10 | RP6/AN4/RC0 — Remappable I/O / analog input |
| Chân 11 | VSS — Digital ground |
| Chân 12 | VDD — Digital supply (3.3 V) |
| Chân 13 | PWM2H/RP5/RB5 — PWM2H output / remappable I/O |
| Chân 14 | PWM2L/RP4/RB4 — PWM2L output / remappable I/O |
| Chân 15 | PWM1H/RP3/RB3 — PWM1H output / remappable I/O |
| Chân 16 | PWM1L/RP2/RB2 — PWM1L output / remappable I/O |
| Chân 17 | AN0/RP1/RB1 — Analog input AN0 / remappable I/O |
| Chân 18 | AN1/RP0/RB0 — Analog input AN1 / remappable I/O |
| Chân 19 | AVSS — Analog ground |
| Chân 20 | AVDD — Analog supply (3.3 V, tie to VDD) |
| Chân 21 | RP22/PWM4L/RD8 — Remappable I/O / PWM4L output |
| Chân 22 | RP23/PWM4H/RD9 — Remappable I/O / PWM4H output |
| Chân 23 | RP24/RD10 — Remappable I/O |
| Chân 24 | RP25/RD11 — Remappable I/O |
| Chân 25 | SDA1/RG3 — I2C1 SDA / remappable |
| Chân 26 | SCL1/RG2 — I2C1 SCL / remappable |
| Chân 27 | U1TX/SDO1/RF3 — UART1 TX / SPI1 SDO |
| Chân 28 | U1RX/SDI1/RF2 — UART1 RX / SPI1 SDI |
| Chân 29 | SCK1/RF6 — SPI1 clock |
| Chân 30 | SS1/RF7 — SPI1 slave select |
| Chân 31 | OSC1/CLKIN/RA2 — Crystal oscillator input / external clock |
| Chân 32 | OSC2/CLKOUT/RA3 — Crystal oscillator output / system clock out |
| Chân 33 | FLTA/RA4 — PWM fault input A |
| Chân 34 | FLTB/RA5 — PWM fault input B |
| Chân 35 | MCLR — Master clear / programming reset (active-low) |
| Chân 36 | PGEC1/AN12/RB0 — ICSP programming clock / analog input (function shared with pin 18 remap) |
| Chân 37 | PGED1/AN13/RB1 — ICSP programming data / analog input (function shared with pin 17 remap) |
| Chân 38 | VSS — Digital ground |
| Chân 39 | VDD — Digital supply (3.3 V) |
| Chân 40 | TCKIA/CMP1A/RP19/RC4 — Timer input / comparator 1 output A |
| Chân 41 | TCKIB/CMP2A/RP20/RC5 — Timer input / comparator 2 output A |
| Chân 42 | CMP1B/RP26/RC6 — Comparator 1 output B |
| Chân 43 | CMP2B/RP27/RC7 — Comparator 2 output B |
| Chân 44 | VREF-/RA1 — ADC reference negative / analog I/O |
Ứng dụng tiêu biểu
DSPIC33FJ16GS404-50I/ML phù hợp cho 6 Áp dụngs: Digitally Controlled Isolated DC/DC Converters, Power Factor Correction (PFC) Controllers, Solar Micro-Inverter Control, LED Lighting Drivers, Industrial SMPS - Telecom & Server Power, Class-D Audio Amplifier Control Loops.
Digitally Controlled Isolated DC/DC Converters
The DSPIC33FJ16GS404-50I/ML fits isolated DC/DC converter control because its 50 MIPS throughput and 4 MSPS ADC execute Type-II/Type-III digital compensators inside sub-microsecond loop periods, while the SMPS-optimized PWM outputs drive the primary-side MOSFETs with programmable dead time and complementary channels. The 1.04 ns PWM resolution supports high-frequency full-bridge and LLC topologies at switching frequencies up to 2 MHz. Placed between the current-sense amplifier and the gate driver, the dsPIC33FJ16GS404-50I/ML implements peak-current-mode control with slope compensation entirely in firmware, eliminating analog PWM ICs and reducing the BOM.
Được đề xuất
Power Factor Correction (PFC) Controllers
The DSPIC33FJ16GS404-50I/ML is well suited for CCM PFC stages, where its high-speed ADC samples the input voltage and inductor current at the PWM frequency, and the 50 MIPS DSP engine computes the digital current reference and feed-forward voltage term in real time. This achieves THD below 5% and PF above 0.99 per IEC 61000-3-2 with deterministic firmware execution. The analog comparators with DAC references further support cycle-by-cycle peak current limiting. Placed between the rectifier bridge and the boost inductor, the part integrates PFC control, inrush limiting, and brown-out protection in one IC.
Được đề xuất
Solar Micro-Inverter Control
For sub-300 W solar micro-inverters, the DSPIC33FJ16GS404-50I/ML executes MPPT (Perturb-and-Observe or Incremental Conductance), anti-islanding detection, and grid synchronization alongside the DC/DC and DC/AC stage control. Its 16 KB Flash holds the MPPT state machine, lookup tables, and grid-monitor algorithm; the SMPS PWM drives both the DC/DC stage and the H-bridge inverter on complementary outputs. Per UL 1741 / IEEE 1547, the part's fast ADC supports sub-cycle grid-voltage zero-crossing detection with deterministic latency.
Được đề xuất
LED Lighting Drivers
The DSPIC33FJ16GS404-50I/ML drives high-brightness LED strings with constant-current regulation through its PWM modules and high-speed ADC. By digitizing the inductor current and LED forward voltage, it implements adaptive dimming control (analog + PWM dimming) and thermal foldback without external analog control ICs. Its 50 MIPS core handles DALI or 0-10 V dimming protocol stacks while keeping the closed-loop bandwidth above 1 kHz for flicker-free operation below the IEEE 1789 low-risk frequency threshold.
Được đề xuất
Industrial SMPS - Telecom & Server Power
The DSPIC33FJ16GS404-50I/ML is widely deployed in 48 V telecom bricks and intermediate bus converters where its SMPS-optimized peripherals support phase-shifted full-bridge, active-clamp forward, or full-bridge LLC topologies. The industrial temperature range (-40C to +85C) and exposed-pad QFN package provide the thermal headroom required for fanless operation in sealed enclosures. With 16 KB Flash, it fits digital-compensator firmware plus PMBus/I2C telemetry for compliance with the DOSA digital-pin standards common in 1/16th brick and 1/8th brick modules.
Được đề xuất
Class-D Audio Amplifier Control Loops
The DSPIC33FJ16GS404-50I/ML implements the digital modulator and feedback loop for Class-D audio amplifiers, where its 50 MIPS core executes sigma-delta or self-oscillating loop modulation at audio sample rates while the SMPS PWM drives the output H-bridge. The fast ADC samples the output current for speaker-protect feedback, and the 16 KB Flash accommodates DSP filter coefficients, protection state machines, and I2C control registers. Audio performance meets THD+N below 0.01% in well-tuned designs, with deterministic latency that preserves phase accuracy for multi-way crossovers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DSPIC33FJ16GS404-50I/ML — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | DSPIC33FJ16GS404T-50I/ML | DSPIC33FJ16GS504-50I/ML | DSPIC33FJ16GS402-50I/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN-EP (8x8 mm) | 44-pin QFN-EP (8x8 mm) - same | 44-pin QFN-EP (8x8 mm) - same | 44-pin QFN (variant) - same |
| Maximum CPU Speed | 50 MIPS (50 MHz) | 50 MIPS | 50 MIPS | 50 MIPS |
| Flash Program Memory | 16 KB | 16 KB | 32 KB | 8 KB |
| Data RAM | 2 KB | 2 KB | 4 KB | 1 KB |
| ADC Speed | Up to 4 MSPS, 10-bit | 4 MSPS | 4 MSPS | 4 MSPS |
| PWM Channels | 4 (SMPS-optimized) | 4 | 6-8 (variant-dependent) | 4 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- SMPS-optimized peripheral set with 1.04 ns PWM resolution (vsDSPIC33FJ16GP304-I/ML)
- Tape-and-reel packaging variant for high-volume SMT (vsDSPIC33FJ16GS404T-50I/ML)
- Higher-memory upgrade path within the same package (vsDSPIC33FJ16GS504-50I/ML)
Ghi chú thiết kế
Estimated: The 44-pin QFN-EP exposed pad is the primary thermal path. With theta_JA typically around 30 C/W on a 4-layer JEDEC test board, the device dissipates up to approximately 2.5 W at 85 C ambient without airflow. For full-load digital-loop designs, use at least 1 square inch of top-layer copper tied to the EP thermal pad, with thermal vias connecting to inner ground planes. Avoid routing signal traces under the EP - this restricts solder joint inspection and reduces thermal performance.
Place a 0.1 uF decoupling capacitor within 3 mm of every VDD/AVDD pin, and a bulk 4.7-10 uF tantalum or ceramic capacitor near the device for high-frequency noise suppression. Route analog signals (AN0-AN13, VREF+, VREF-) away from PWM switching traces; if not avoidable, use a guard trace tied to AVSS. The exposed pad must be soldered to a contiguous ground pour for both thermal dissipation and lowest-inductance return path - micro-via stitching on a 0.5 mm pitch is recommended.
Common pitfalls: (1) Setting PWM dead time below the MOSFET's turn-off time causes shoot-through - configure the ALTBLK register to enforce a minimum dead time of at least 100 ns for typical 100 V MOSFETs. (2) Forgetting to configure the JTAG/ICSP pins (PGEC1/PGED1) as outputs after programming leaves them floating during reset, potentially causing unintended high-current states. (3) Configuring the ADC for simultaneous sampling without first setting the ASAM bit produces misaligned readings - always re-initialize ASAM after each conversion trigger. (4) The PWM fault inputs FLTA/FLTB are active-low; floating pins may trigger false faults - always pull them high via internal or external pull-up.
For noise-critical analog measurements, separate the analog ground (AVSS) and digital ground (VSS) planes and tie them at a single point near the device's EP ground. The crystal oscillator traces should be <5 mm long, surrounded by a guard ring tied to ground, and routed far from PWM switching traces. The ADC reference pin (VREF+) requires a low-ESR 10 nF ceramic bypass capacitor adjacent to the pin; without it, ADC linearity degrades by 1-2 LSB. Estimated: When VREF bypass is omitted, ADC INL typically degrades by 1-2 LSB based on typical QFN-package pin-parasitic analysis.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C); not AEC-Q100 qualified (no automotive suffix). Pb-free / halogen-free per Microchip environmental compliance disclosure.
