DSPIC33FJ128MC708A-E/PT - 40 MIPS Motor Control DSC | Microchip
MPN: DSPIC33FJ128MC708A-E/PT ✓ نشطDSPIC33FJ128MC708A-E/PT نظرة عامة
A Digital Signal Controller (DSC) is a hybrid processor class that combines a deterministic microcontroller (MCU) architecture with on-chip DSP computational resources, enabling real-time control loops alongside signal-processing math such as FFTs, FIR/IIR filters, and space-vector modulation. The dsPIC33F family sits in the broader taxonomy of microcontrollers -> 16-bit MCUs -> DSP-enhanced MCUs -> motor-control DSCs. DSCs are commonly used for closed-loop field-oriented control (FOC) of three-phase motors, sensorless BLDC commutation, digital power conversion, and audio processing where deterministic interrupt latency and on-the-fly math are required.
Key specifications include 16 KB SRAM, 8-channel PWM with dedicated timing hardware for motor control, a 12-bit ADC with up to 16 channels and 10 MSPS conversion rate, two Analog Comparators, a CAN module, and an ECAN interface for industrial networking. The device operates from 3.0V to 3.6V with industrial -40C to +125C extended temperature range, and integrates an 8 MHz internal RC oscillator with PLL support up to 80 MHz.
The DSP engine is a 16-bit data path with dual 40-bit accumulators, hardware DO/REPEAT loops, and fractional/integer saturation logic, giving the part its 40 MIPS performance rating. The motor-control peripheral set (PWM, ADC, QEI, fault inputs) is tightly coupled to the DSP core via a configurable interrupt controller, allowing a single device to execute current sampling, transformation (Clarke/Park), and PWM update within a few microseconds.
Typical applications include brushless DC (BLDC) motor drives, permanent-magnet synchronous motors (PMSM) with FOC, switched reluctance motors, uninterruptible power supplies (UPS), solar inverters, and switched-mode power supplies (SMPS). The wide operating temperature range and AEC-Q100 qualification make this part suitable for automotive motor control such as electric power steering pumps, cooling fans, and HVAC blowers.
When designing with this DSC, ensure that the trace length between the PWM output pins and the gate driver is short to minimize ringing on the switching node. The on-chip ADC requires careful analog ground separation, and a 10 nF ceramic bypass capacitor placed within 5 mm of each VDD pin is recommended. The -E/PT suffix indicates the extended-temperature TQFP-80 package variant, distinguishing it from the industrial -I/PT part.
بدائل مباشرة لـ DSPIC33FJ128MC708A-E/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع DSPIC33FJ128MC708A-E/PT (نفس عامل الشكل والبصمة) — يختلف في Core Architecture, Package.
DSPIC33FJ128MC706A-E/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
DSPIC33FJ128MC706-E/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
DSPIC33FJ128MC708A-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
DSPIC33FJ128MC506A-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←DSPIC33FJ128MC708A-E/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | dsPIC33F 16-bit DSC (DSP + MCU) |
| CPU Speed | 40 MIPS at 80 MHz |
| Program Memory (Flash) | 128 KB |
| Data Memory (SRAM) | 16 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| نطاق درجة حرارة التشغيل | -40 C to +125 C (extended) |
| العلبة | TQFP-80 (12x12 mm) |
| AEC-Q100 Qualification | Yes (automotive grade) |
| ADC | 12-bit, up to 16 channels |
| PWM Channels | 8 channels with motor-control timing |
| Communication Interfaces | ECAN, UART, SPI, I2C |
| Analog Comparators | 2 |
| Internal Oscillator | 8 MHz RC with PLL |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف DSPIC33FJ128MC708A-E/PT
| دبوس 1 | RP15/CN13/PMD7/RB15 — I/O port pin / remappable peripheral |
| دبوس 2 | RP14/CN12/PMD6/RB14 — I/O port pin / remappable peripheral |
| دبوس 3 | RP13/CN11/PMD5/RB13 — I/O port pin / remappable peripheral |
| دبوس 4 | RP12/CN10/PMD4/RB12 — I/O port pin / remappable peripheral |
| دبوس 5 | AVSS — Analog ground |
| دبوس 6 | AVDD — Analog supply voltage (3.3V) |
| دبوس 7 | AN0/VREF+/RA0 — Analog input 0 / positive voltage reference / RA pin 0 |
| دبوس 8 | AN1/VREF-/RA1 — Analog input 1 / negative voltage reference / RA pin 1 |
| دبوس 9 | AN2/RA2 — Analog input 2 / RA pin 2 |
| دبوس 10 | AN3/RA3 — Analog input 3 / RA pin 3 |
| دبوس 11 | AN4/RA4 — Analog input 4 / RA pin 4 |
| دبوس 12 | AN5/RA5 — Analog input 5 / RA pin 5 |
| دبوس 13 | VDD — Digital supply voltage (3.3V) |
| دبوس 14 | VSS — Digital ground |
| دبوس 15 | OSC1/RA6 — Crystal oscillator input / RA pin 6 |
| دبوس 16 | OSC2/RA7 — Crystal oscillator output / RA pin 7 |
| دبوس 17 | PWM1H/RE0 — PWM output 1 high side / RE pin 0 |
| دبوس 18 | PWM1L/RE1 — PWM output 1 low side / RE pin 1 |
| دبوس 19 | PWM2H/RE2 — PWM output 2 high side / RE pin 2 |
| دبوس 20 | PWM2L/RE3 — PWM output 2 low side / RE pin 3 |
| دبوس 21 | PWM3H/RE4 — PWM output 3 high side / RE pin 4 |
| دبوس 22 | PWM3L/RE5 — PWM output 3 low side / RE pin 5 |
| دبوس 23 | VDD — Digital supply voltage (3.3V) |
| دبوس 24 | VSS — Digital ground |
| دبوس 25 | PWM4H/RE6 — PWM output 4 high side / RE pin 6 |
| دبوس 26 | PWM4L/RE7 — PWM output 4 low side / RE pin 7 |
| دبوس 27 | RP20/CN18/RC0 — I/O port pin / remappable peripheral |
| دبوس 28 | RP21/CN19/RC1 — I/O port pin / remappable peripheral |
| دبوس 29 | RP22/CN20/RC2 — I/O port pin / remappable peripheral |
| دبوس 30 | RP23/CN21/RC3 — I/O port pin / remappable peripheral |
| دبوس 31 | RP24/CN22/RC4 — I/O port pin / remappable peripheral |
| دبوس 32 | RP25/CN23/RC5 — I/O port pin / remappable peripheral |
| دبوس 33 | RP26/CN24/RC6 — I/O port pin / remappable peripheral |
| دبوس 34 | RP27/CN25/RC7 — I/O port pin / remappable peripheral |
| دبوس 35 | RP28/CN26/RC8 — I/O port pin / remappable peripheral |
| دبوس 36 | RP29/CN27/RC9 — I/O port pin / remappable peripheral |
| دبوس 37 | RP30/CN28/RC10 — I/O port pin / remappable peripheral |
| دبوس 38 | RP31/CN29/RC11 — I/O port pin / remappable peripheral |
| دبوس 39 | VSS — Digital ground |
| دبوس 40 | VDD — Digital supply voltage (3.3V) |
| دبوس 41 | RP8/CN6/RD8 — I/O port pin / remappable peripheral |
| دبوس 42 | RP9/CN7/RD9 — I/O port pin / remappable peripheral |
| دبوس 43 | RP10/CN8/RD10 — I/O port pin / remappable peripheral |
| دبوس 44 | RP11/CN9/RD11 — I/O port pin / remappable peripheral |
| دبوس 45 | RP4/CN4/RD4 — I/O port pin / remappable peripheral |
| دبوس 46 | RP5/CN5/RD5 — I/O port pin / remappable peripheral |
| دبوس 47 | RP6/CN6/RD6 — I/O port pin / remappable peripheral |
| دبوس 48 | RP7/CN7/RD7 — I/O port pin / remappable peripheral |
| دبوس 49 | C1RX/RF0 — ECAN1 receive / RF pin 0 |
| دبوس 50 | C1TX/RF1 — ECAN1 transmit / RF pin 1 |
| دبوس 51 | QEA1/RF2 — Quadrature encoder A input 1 / RF pin 2 |
| دبوس 52 | QEB1/RF3 — Quadrature encoder B input 1 / RF pin 3 |
| دبوس 53 | INDX1/RF4 — Quadrature index input 1 / RF pin 4 |
| دبوس 54 | HOME1/RF5 — Home position input 1 / RF pin 5 |
| دبوس 55 | QEA2/RF6 — Quadrature encoder A input 2 / RF pin 6 |
| دبوس 56 | QEB2/RF7 — Quadrature encoder B input 2 / RF pin 7 |
| دبوس 57 | INDX2/RF8 — Quadrature index input 2 / RF pin 8 |
| دبوس 58 | FLTA1/RG0 — PWM fault A input 1 / RG pin 0 |
| دبوس 59 | FLTA2/RG1 — PWM fault A input 2 / RG pin 1 |
| دبوس 60 | FLTB1/RG2 — PWM fault B input 1 / RG pin 2 |
| دبوس 61 | FLTB2/RG3 — PWM fault B input 2 / RG pin 3 |
| دبوس 62 | VSS — Digital ground |
| دبوس 63 | VDD — Digital supply voltage (3.3V) |
| دبوس 64 | MCLR — Master clear reset (active low) |
| دبوس 65 | PGED2/RP0/CN4/RB0 — Programming data 2 / I/O port |
| دبوس 66 | PGEC2/RP1/CN5/RB1 — Programming clock 2 / I/O port |
| دبوس 67 | PGED1/RP2/CN6/RB2 — Programming data 1 / I/O port |
| دبوس 68 | PGEC1/RP3/CN7/RB3 — Programming clock 1 / I/O port |
| دبوس 69 | RP4/CN8/RB4 — I/O port pin / remappable peripheral |
| دبوس 70 | RP5/CN9/RB5 — I/O port pin / remappable peripheral |
| دبوس 71 | RP6/CN10/RB6 — I/O port pin / remappable peripheral |
| دبوس 72 | RP7/CN11/RB7 — I/O port pin / remappable peripheral |
| دبوس 73 | RP16/CN14/RB8 — I/O port pin / remappable peripheral |
| دبوس 74 | RP17/CN15/RB9 — I/O port pin / remappable peripheral |
| دبوس 75 | RP18/CN16/RB10 — I/O port pin / remappable peripheral |
| دبوس 76 | RP19/CN17/RB11 — I/O port pin / remappable peripheral |
| دبوس 77 | VDD — Digital supply voltage (3.3V) |
| دبوس 78 | VSS — Digital ground |
| دبوس 79 | PGED3/RP24/CN18/RF0 — Programming data 3 / I/O port |
| دبوس 80 | PGEC3/RP25/CN19/RF1 — Programming clock 3 / I/O port |
التطبيقات النموذجية
DSPIC33FJ128MC708A-E/PT مناسب لـ 6 التطبيقs: Brushless DC (BLDC) Motor Control, Field-Oriented Control (FOC) of PMSM Motors, Uninterruptible Power Supply (UPS) Control, Switched-Mode Power Supply (SMPS) Control, Automotive HVAC Blower & Cooling Fans, Solar Inverter Power Conversion.
Brushless DC (BLDC) Motor Control
The DSPIC33FJ128MC708A-E/PT is purpose-built for BLDC motor control, leveraging its 40 MIPS DSP engine to execute sensorless back-EMF commutation, trapezoidal or sinusoidal commutation, and field-oriented control (FOC) within microsecond cycle times. The 8-channel PWM module with complementary outputs and programmable dead-time directly drives a three-phase inverter bridge without external timing logic. The 12-bit, 10 MSPS ADC simultaneously samples two phase currents for accurate torque estimation, while the Quadrature Encoder Interface (QEI) supports sensored BLDC variants. Compared to a generic MCU, the DSP hardware multiply-accumulate (MAC) and DO/REPEAT loops reduce FOC math execution time by 5-10x, enabling higher PWM switching frequencies and quieter motor operation.
موصى به
Field-Oriented Control (FOC) of PMSM Motors
The DSPIC33FJ128MC708A-E/PT's dual 40-bit accumulators and hardware DO/REPEAT loops make it ideal for PMSM field-oriented control, where Clarke/Park transforms, inverse transforms, and PI loops must execute every 50-100 us. The 128 KB Flash comfortably stores lookup tables (sin/cos, inverse Park), motor parameter sets, and FOC state-machine code. The on-chip 12-bit ADC's simultaneous sampling capability aligns current measurements with PWM duty cycle updates, minimizing torque ripple. The 40 MIPS performance ensures the entire FOC loop completes well within the PWM period even at 20 kHz switching, leaving headroom for higher-level control logic and CAN communication.
موصى به
Uninterruptible Power Supply (UPS) Control
The DSPIC33FJ128MC708A-E/PT is well suited to UPS inverter control, where it must maintain 50/60 Hz sine output while regulating battery charge/discharge. The DSP engine executes the digital control loop for the DC-AC inverter stage, and the 12-bit ADC monitors battery voltage, output voltage, and inductor current for closed-loop regulation. The 16 KB SRAM accommodates state-machine buffers and waveform look-up tables. The wide -40C to +125C operating range supports industrial UPS installations. Compared to discrete analog controllers, the DSC approach enables firmware-configurable UPS modes (online, line-interactive, offline) without PCB rework.
موصى به
Switched-Mode Power Supply (SMPS) Control
The DSPIC33FJ128MC708A-E/PT provides digital control of SMPS topologies including PFC, LLC, and full-bridge converters used in industrial and telecom power systems. The high-resolution PWM modules generate the switching waveforms with programmable dead-time and fault handling, while the high-speed ADC samples primary/secondary currents and voltages at the switching frequency. The DSP engine runs digital compensator algorithms (Type-II, Type-III) with adaptive gain for load-step response. Compared to analog UC3842-type controllers, the DSC implementation adds programmability, telemetry via CAN, and adaptive protection, all in the same TQFP-80 footprint as the analog counterpart would need for support circuitry.
موصى به
Automotive HVAC Blower & Cooling Fans
The DSPIC33FJ128MC708A-E/PT's AEC-Q100 qualification and extended -40C to +125C temperature range make it ideal for automotive HVAC blower motors and engine cooling fans. The 40 MIPS DSP engine runs sensorless FOC algorithms that minimize acoustic noise and improve efficiency over traditional trapezoidal drives. The ECAN module integrates with the vehicle's body CAN bus for speed/torque commands and diagnostic feedback. The 8-channel PWM drives the three-phase inverter directly, with built-in fault protection for overcurrent and stall conditions. Compared to brushed-motor solutions, the BLDC/PMSM approach reduces vehicle electrical load by 30-50%.
موصى به
Solar Inverter Power Conversion
The DSPIC33FJ128MC708A-E/PT can serve as the control DSP in a small-to-medium solar inverter, executing MPPT (Maximum Power Point Tracking) algorithms, DC-DC boost control, and DC-AC inversion. The 128 KB Flash stores MPPT profiles, grid-tie synchronization logic, and anti-islanding detection algorithms required by IEEE 1547 (compliance depends on certification, not on the part). The 12-bit ADC monitors panel voltage/current, grid voltage, and output current for closed-loop regulation. The 40 MIPS performance runs the dual-loop control (current inner loop, voltage outer loop) within the PWM switching cycle. The ECAN interface enables integration into smart-grid and SCADA systems for telemetry.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ DSPIC33FJ128MC708A-E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | DSPIC33FJ128MC706A-E/PT | DSPIC33FJ128MC706-E/PT | DSPIC33FJ128MC708A-I/PT | DSPIC33FJ128MC506A-E/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| CPU Speed | 40 MIPS (80 MHz) | 40 MIPS (80 MHz) | 40 MIPS (80 MHz) | 40 MIPS (80 MHz) | 40 MIPS (80 MHz) |
| CAN Module | Yes (ECAN) | No | No | Yes (ECAN) | Yes (ECAN) |
| Operating Temperature | -40 C to +125 C (extended) | -40 C to +125 C (extended) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) |
| AEC-Q100 Qualification | Yes | Yes | Yes | No (industrial only) | Yes |
| PWM Channels | 8 | 8 | 8 | 8 | 8 |
| ADC | 12-bit, 16 channels, 10 MSPS | 12-bit, 16 channels, 10 MSPS | 12-bit, 16 channels, 10 MSPS | 12-bit, 16 channels, 10 MSPS | 12-bit, 16 channels, 10 MSPS |
أبرز الفروقات
- Includes CAN/ECAN module on TQFP-80 footprint (مقابلDSPIC33FJ128MC706A-E/PT)
- 128 KB Flash for advanced control algorithms (مقابلDSPIC33FJ128MC506A-E/PT)
- Extended -40C to +125C automotive temperature range (مقابلDSPIC33FJ128MC708A-I/PT)
ملاحظات التصميم
Each VDD pin must be decoupled with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, and each AVDD pin should have its own 10 uF + 0.1 uF combination to keep analog and digital supplies separate. The internal voltage regulator requires a bulk 10 uF capacitor on VDD/VSS pairs. Power-on-reset is automatic; a 10 kohm pull-up on MCLR is required for proper operation. Avoid switching noise injection into AVDD by using a ferrite bead between DVDD and AVDD when sharing a 3.3V rail.
The TQFP-80 package has a 0.5 mm pitch which requires careful PCB layout. Use 0.15 mm/6 mil trace width with 0.15 mm spacing, and route all PWM outputs and ADC inputs on the top layer with short, direct paths to minimize parasitic inductance. Place the crystal oscillator within 10 mm of the OSC1/OSC2 pins and guard the traces with a ground ring to reduce EMI susceptibility. For motor-control designs, separate the analog ground (AVSS) and digital ground (VSS) at the IC and join them at a single point near the PCB power entry.
The PGECx/PGEDx pins must be used as matched pairs for ICSP programming (e.g., PGEC1 with PGED1, NOT PGEC1 with PGED2). During PCB layout, ensure unused PWM channels are not left floating - configure them as outputs or tie them to ground through 10 kohm resistors. The 12-bit ADC requires a minimum acquisition time of 132 ns; do not reduce this or accuracy will degrade. For FOC applications, the simultaneous-sample mode must be enabled for accurate current sensing, otherwise torque ripple will result.
معلومات الامتثال
AEC-Q100 qualified per Microchip product page and Hotenda listing. RoHS and lead-free compliance confirmed. Halogen-free status not specified in verified web data.
