DSPIC33EP128GS708-E/PT - 16-bit DSC 70 MIPS 128KB Flash | Microchip
MPN： DSPIC33EP128GS708-E/PT ✓ 啟用中DSPIC33EP128GS708-E/PT 概覽
A Digital Signal Controller combines the computational throughput of a DSP with the peripheral integration and ease of use of a microcontroller, sitting in the product hierarchy between a general-purpose MCU and a dedicated DSP. DSCs are the controller of choice for closed-loop switch-mode power conversion, where deterministic interrupt latency and high-resolution PWM are more important than general-purpose processing.
Key features include the interconnected High-Speed PWM module with dedicated time bases and advanced modulation modes tailored for SMPS and digital power conversion, high-speed 10-bit and 12-bit ADC options with concurrent multi-channel sampling, integrated analog comparators and Programmable Gain Amplifiers (PGA), and DSP engine support with single-cycle MAC and dual operand fetch. The device runs from a single 3V to 3.6V supply and carries AEC-Q100 qualification and Functional Safety (FuSa) support, as listed by DigiKey.
Architecturally, the dsPIC33EP core uses a modified Harvard pipeline with 16-bit data and 24-bit instructions, achieving deterministic execution suited to fast control loops. The GS family specifically interconnects the PWM, ADC, comparators, and PGA so trigger signals can be routed on-chip without CPU intervention, reducing loop latency in multi-loop power supplies.
Typical applications include AC-DC power supplies, power factor correction (PFC) stages, DC-DC converters, solar micro-inverters, battery chargers, LED drivers, and uninterruptible power supplies.
Design consideration: the extended-temperature -E grade is rated beyond the standard -40C to +85C industrial range; verify your thermal design supports the E-grade envelope, or the -I/PT variant may reduce cost.
This page synthesizes distributor pricing, drop-in alternatives within the GS70X family, and practical design notes not found in the manufacturer datasheet. Prices shown are estimates as of 2026-09-23.
直接替換替代品，適用於 DSPIC33EP128GS708-E/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DSPIC33EP128GS708-E/PT （相同外形與佔位） — 差異在於 Package, Functional Safety Support, Operating Temperature, RoHS Status, Supply Voltage.
DSPIC33EP128GS708-I/PT
✅ 直接替換聯絡詢價
查看資料表 →DSPIC33EP256GS708-E/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DSPIC33EP64GS708-E/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →DSPIC33EP128GS706-E/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DSPIC33EP128GS708-E/PT 最大額定值與電氣特性
| Core | dsPIC33EP 16-bit DSC |
| Maximum CPU Speed | 70 MIPS |
| Program Memory (Flash) | 128 KB (43K x 24) |
| RAM | 8 KB |
| 供應電壓 | 3 V to 3.6 V |
| 封裝 | 80-TQFP (12x12 mm) |
| 安裝類型 | Surface Mount |
| PWM Module | Interconnected High-Speed PWM (digital power optimized) |
| ADC | High-speed 10-bit / 12-bit ADC |
| Analog Comparators | Yes |
| Programmable Gain Amplifier | Yes |
| Series | dsPIC33EP GS (Automotive, AEC-Q100) |
| Functional Safety Support | FuSa (per DigiKey listing) |
| Temperature Grade | E (extended temperature) |
| Application Target | SMPS and Digital Power Conversion |
| RoHS 狀態 | Compliant (per family data sheet product page) |
DSPIC33EP128GS708-E/PT 80-tqfp (12x12 mm) 腳位配置指南
DSPIC33EP128GS708-E/PT（80-tqfp (12x12 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： DSPIC33EP128GS708-E/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
DSPIC33EP128GS708-E/PT 適用於 6 應用s: AC-DC Power Supplies, Power Factor Correction (PFC), DC-DC Converters, Solar Micro-Inverters, Battery Chargers, Digital LED Drivers.
AC-DC Power Supplies
The DSPIC33EP128GS708-E/PT is purpose-built for digitally controlled AC-DC converters. Its interconnected High-Speed PWM generates phase-shifted or complementary outputs with high duty-cycle resolution, while the high-speed ADC samples output voltage and input current concurrently for tight multi-loop regulation. According to Microchip, the GS70X/80X family explicitly targets AC-DC applications with dedicated SMPS features. Placed as the single control IC driving the primary-side power stage, the 70 MIPS core executes current- and voltage-loop compensators with deterministic latency, and on-chip comparators implement cycle-by-cycle overcurrent limiting without CPU intervention, improving both efficiency and fault robustness.
推薦
Power Factor Correction (PFC)
For boost or bridgeless PFC stages, this DSC offers the high-resolution PWM and fast ADC required for average-current-mode control at switching frequencies above 100 kHz. The 70 MIPS core closes the current loop quickly enough to achieve power factors above 0.99, while the integrated PGA amplifies shunt signals directly, reducing external component count. On-chip comparators provide hardware overcurrent shutdown essential for PFC reliability during line transients. Because PFC usually pairs with a downstream DC-DC stage, the multiple PWM generators with dedicated time bases allow one chip to control both converter stages in a multi-loop architecture with coordinated fault handling.
推薦
DC-DC Converters
The GS708 controls buck, boost, buck-boost, LLC and phase-shifted full-bridge topologies from a single controller. The High-Speed PWM module's advanced modulation modes (complementary, push-pull, phase-shifted) map directly onto these topologies, and the ADC can be triggered from the PWM time base so sampling occurs at the quietest point of the switching cycle, minimizing switching-noise corruption of feedback. The 8 KB RAM supports soft-start state machines, compensation networks, and telemetry buffers. Firmware-based control also enables adaptive dead-time insertion, which measurably improves efficiency versus fixed-dead-time analog controllers at light load.
推薦
Solar Micro-Inverters
Micro-inverter designs require simultaneous MPPT control of the panel-side DC-DC stage and grid-synchronized DC-AC inversion. The DSPIC33EP128GS708-E/PT covers both loops with its multiple PWM generators and concurrent ADC sampling, at 70 MIPS leaving compute margin for MPPT perturb-and-observe algorithms and grid PLLs. The extended -E temperature grade suits sealed outdoor enclosures where ambient temperatures exceed industrial limits. AEC-Q100 qualification and Functional Safety support (per DigiKey listing) additionally ease certification discussions for grid-tied equipment where controller integrity is scrutinized.
推薦
Battery Chargers
Smart battery chargers benefit from the DSC's combination of precision analog and configurable PWM. Charge profiles (CC-CV, trickle, termination) are implemented in firmware, allowing one hardware platform to serve multiple battery chemistries with a code update rather than a redesign. The ADC's concurrent multi-channel sampling tracks battery voltage, current and temperature (via NTC) in the same switching cycle, while the comparators guard against overcurrent faults instantly. The 128 KB Flash accommodates charging state machines, safety logs and communication stacks such as SMBus, making it well suited to multi-chemistry charger platforms.
推薦
Digital LED Drivers
High-power and architectural LED lighting uses this DSC for precisely dimmable, efficiency-regulated constant-current sources. The High-Speed PWM supports both switching regulation and independent dimming control with high resolution, avoiding visible flicker at low dimming levels. The ADC monitors LED current and heatsink temperature so firmware can enforce thermal derating curves in real time. With DALI or DMX stacks fitting comfortably in 128 KB Flash, the GS708 consolidates power conversion and lighting-protocol control into a single 80-TQFP controller, reducing BOM count versus an analog driver plus separate MCU.
推薦
推薦產品摘要
工程參考資料，適用於 DSPIC33EP128GS708-E/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DSPIC33EP128GS708-I/PT | DSPIC33EP256GS708-E/PT | DSPIC33EP64GS708-E/PT |
|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB (43K x 24) | 128 KB | 256 KB | 64 KB |
| RAM | 8 KB | 8 KB | 16 KB | 8 KB |
| 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 |
| Temperature Grade | E (extended) | I (industrial, -40C to +85C) | E (extended) | E (extended) |
主要差異化特點
- Extended temperature rating for hot enclosures (對比DSPIC33EP128GS708-I/PT)
- Balanced Flash for cost efficiency (對比DSPIC33EP256GS708-E/PT)
- Full PWM/ADC feature set retained (對比DSPIC33EP128GS706-E/PT)
設計說明
The dsPIC33EP core runs from a single 3.0 V to 3.6 V rail. Decouple every VDD/VSS pair on the 80-TQFP with 100 nF ceramic capacitors placed within 2 mm of the pins, plus one bulk 10 uF capacitor per device side. In digital-power applications the controller shares a board with high dv/dt switching nodes - use a dedicated low-noise LDO or ferrite-isolated supply for the MCU rail to prevent PWM jitter caused by supply ripple coupling into the PLL and ADC reference.
Route the ADC input traces away from PWM and gate-drive traces; the GS708's interconnected ADC can be triggered directly from the PWM module, so sample at mid off-time rather than at switching edges to avoid switching-noise corruption. Keep the analog reference (VREF) ground return separate from the power-ground of the converter stage and join them at a single star point. Follow Microchip's dsPIC33EP digital power reference designs for the 12x12 TQFP layout patterns.
Do not mix up the temperature suffix when qualifying builds: -E/PT (extended) and -I/PT (industrial) are the same silicon but rated for different ambients - substituting -I for -E in a hot enclosure voids your temperature margin. Also confirm your compiler and linker settings match the exact Flash density (64/128/256 KB) when swapping pin-compatible family members; an incorrect device selection can silently over-program the vector table region.
合規資訊
AEC-Q100 qualification and Functional Safety (FuSa) support per DigiKey listing; automotive designation per Hotenda listing. RoHS/lead-free inferred from Microchip standard product offering - verify certificate for specific date code.