DSPIC33EP128GS804T-I/PT - 70MIPS 128KB DSC | Microchip
MPN: DSPIC33EP128GS804T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.94 | $5.94 |
| 10 | $5.5 | $55.00 |
| 100 | $5.05 | $505.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.3 | $4,300.00 |
DSPIC33EP128GS804T-I/PT Overview
A Digital Signal Controller combines the compute throughput of a DSP core with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy, a DSC such as this dsPIC33EP device sits at the heart of digital power conversion systems: it closes control loops (voltage, current, power factor) that were traditionally implemented with analog control ICs, replacing hardwired compensation with firmware executed by the DSP engine.
Key features include the 16-bit dsPIC33E CPU core with DSP instruction extensions and a 40-bit accumulator, a high-speed interconnected PWM module purpose-built for switch-mode power supplies, an analog front end with high-speed ADC, programmable gain amplifier (PGA) and comparators, and a CAN module for industrial communication. The interconnected PWM architecture supports multi-loop topologies such as LLC, phase-shifted full bridge, AC-DC PFC stages, and buck/boost converters with deterministic phase relationships.
Technical depth: the GS80X family is Microchip's digital-power-optimized branch of the dsPIC33EP line. The core runs from a 3.3V supply at up to 70 MIPS, while hardware DSP MAC instructions accelerate control-law computation. Flash is 43K x 24-bit instruction words (128 KB), and self-programming enables field firmware updates of power-conversion firmware.
Typical applications include AC-DC power supplies with PFC, DC-DC converters and LLC resonant stages, solar micro-inverters and battery chargers, uninterruptible power supplies, LED drivers, and e-bike/industrial motor control where CAN connectivity is required.
Design consideration: budget the 3.3V rail cleanly and use Microchip's Digital Compensator design tools to tune loop gains; the interconnected PWM/ADC routing determines loop latency and must be verified in the datasheet's typical-application guidance.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-09-23.
Drop-in alternatives for DSPIC33EP128GS804T-I/PT — 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 DSPIC33EP128GS804T-I/PT (same form factor and footprint) — differing in Package, Packaging, Core Architecture, Program Memory Type, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GS804-I/PT
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →DSPIC33EP256GS804-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GS802-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GM304T-I/PT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33EP64GS804-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.2 / Unit
View Datasheet →DSPIC33EP128GS804T-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core with DSP engine |
| Max CPU Speed | 70 MIPS (70 MHz) |
| Flash Memory | 128 KB (43K x 24-bit instructions) |
| RAM | 8 KB |
| Supply Voltage | 3.3 V |
| Package | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| CAN Module | Yes |
| High-Speed PWM | Interconnected high-speed PWM (digital power optimized) |
| ADC | High-speed ADC with PGA and comparators |
| Family | dsPIC33EPXXGS70X/80X (SMPS & Digital Power Conversion) |
| Product Type | Digital Signal Controller (DSC) |
| Packaging | Tape and Reel (T suffix) |
| Temperature Grade | I (industrial, -40C to +85C) |
| Program Memory Type | Flash |
DSPIC33EP128GS804T-I/PT 44-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP128GS804T-I/PT (44-tqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33EP128GS804T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GS804T-I/PT is suitable for 6 applications: AC-DC Power Supplies with PFC, LLC Resonant DC-DC Converters, Solar Micro-Inverters and Battery Chargers, Uninterruptible Power Supplies (UPS), Digital LED Drivers, Industrial Motor Control with CAN.
AC-DC Power Supplies with PFC
The DSPIC33EP128GS804T-I/PT fits AC-DC power supplies with power factor correction because its interconnected high-speed PWM can generate the PFC switch drive and a downstream converter drive with deterministic phase relationships from one controller. Running at 70 MIPS, the DSP core executes current- and voltage-loop compensation firmware each switching cycle, while the high-speed ADC with PGA samples inductor current and bus voltage with low latency. On-chip comparators provide cycle-by-cycle current limiting without CPU intervention. Placed as the single supervisory controller on the secondary-referenced control board, it replaces dedicated analog PFC/PWM combo ICs and adds programmable protection, brown-out handling, and CAN-based telemetry - at the cost of firmware development effort versus fixed-function control ICs.
Recommended
LLC Resonant DC-DC Converters
For LLC half-bridge and full-bridge resonant converters, the DSPIC33EP128GS804T-I/PT provides complementary PWM outputs with programmable dead-time, frequency modulation, and burst mode through its interconnected high-speed PWM module. The 70 MIPS core runs the voltage feedback loop and adaptive dead-time algorithms, while the high-speed ADC tracks the resonant tank current via the PGA for safety cutoffs. Because switching frequency can reach hundreds of kilohertz, the PWM resolution of the GS80X family maintains duty/frequency accuracy across the operating range. The controller is placed on the primary-side control board, closing the regulation loop digitally; the benefit is firmware-tunable gain scheduling across load range, versus a fixed-frequency analog LLC controller that cannot adapt its compensation dynamically.
Recommended
Solar Micro-Inverters and Battery Chargers
Solar micro-inverters and multi-chemistry battery chargers benefit from the DSPIC33EP128GS804T-I/PT's combination of DSP throughput and mixed-signal integration. The 70 MIPS DSP engine executes MPPT (maximum power point tracking) algorithms such as incremental conductance, while the high-speed ADC plus PGA sample panel voltage/current and battery current simultaneously through multiple channels. The interconnected PWM drives the boost and grid-tie stages with software-defined switching patterns, and the CAN module links several inverters in a string-level network. Operating from the 3.3 V rail in a 44-TQFP (10x10 mm), the controller consolidates MPPT, charging control, and communications in one IC; designers must allocate headroom for firmware complexity that fixed-function charge controllers do not require.
Recommended
Uninterruptible Power Supplies (UPS)
Line-interactive and double-conversion UPS architectures use the DSPIC33EP128GS804T-I/PT to control the rectifier PFC stage, the inverter bridge, and the battery charger from a single 70 MIPS controller. The interconnected high-speed PWM generates phase-locked inverter waveforms referenced to the utility grid, with the high-speed ADC sampling output voltage and battery current for true sinusoidal regulation. The DSP MAC instructions accelerate repetitive control and harmonic compensation loops executed each switching period. Its 128 KB Flash stores multiple operating-mode state machines (online, bypass, eco), and the CAN module reports status to network management cards. Compared with separate controller ICs per stage, this single-chip approach reduces BOM count and cross-controller coordination faults, at the price of higher firmware validation effort.
Recommended
Digital LED Drivers
High-power and tunable LED lighting systems use the DSPIC33EP128GS804T-I/PT as a digital LED driver controller: the interconnected high-speed PWM produces dimming and current-regulation drive signals at high resolution, while the 70 MIPS core runs average-current-mode control with the high-speed ADC and PGA sensing the LED string current. Color-mixing (RGBW) multi-channel fixtures benefit from phase-shifted PWM channels that stagger switching instants, reducing input ripple and EMI filter size. DALI or CAN-based dimming protocols are handled through the on-chip communication peripherals, eliminating external protocol ICs. The 44-TQFP (10x10 mm) industrial-grade package suits enclosed luminaires; the trade-off versus dedicated LED driver ICs is firmware development, repaid by field-updatable dimming curves and multi-topology reuse of one controller platform.
Recommended
Industrial Motor Control with CAN
Although the GS80X family is power-supply oriented, the DSPIC33EP128GS804T-I/PT serves industrial motor drives that need both high-resolution PWM and CAN connectivity, such as e-bike controllers, pump inverters, and servo drives. The 70 MIPS DSP core executes field-oriented control (FOC) loops with single-cycle MAC operations, the high-speed ADC samples phase currents through the PGA, and on-chip comparators implement hardware over-current trip zones independent of software latency. The interconnected PWM generates complementary three-phase outputs with dead-time insertion. The CAN module integrates the drive into industrial networks or vehicle ECUs without external CAN controllers. Relative to the GM family (e.g., DSPIC33EP128GM304), the GS part offers finer PWM interconnect for advanced topologies, making it preferable when the motor drive shares a power-conversion front end.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GS804T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GS804-I/PT | DSPIC33EP256GS804-I/PT | DSPIC33EP128GS802-I/PT | DSPIC33EP128GM304T-I/PT | DSPIC33EP64GS804-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB | 64 KB |
| CPU Speed | 70 MIPS (70 MHz) | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| CAN Module | Yes | Yes | Yes | Yes | Yes | Yes |
| Digital Power PWM Family | GS80X (SMPS optimized, interconnected high-speed PWM) | GS80X - same | GS80X - same | GS80X - same | GM30X - general-purpose/motor family | GS80X - same |
Key Differentiators
- Digital-power-optimized PWM interconnect (vs DSPIC33EP128GM304T-I/PT)
- Double the Flash for headroom (vs DSPIC33EP256GS804-I/PT)
- Tape-and-reel delivery for production (vs DSPIC33EP128GS804-I/PT)
Design Notes
Supply the DSPIC33EP128GS804T-I/PT from a clean 3.3 V rail with 0.1 uF decoupling on each VDD/VSS pair plus bulk capacitance. This device contains an on-chip core regulator requiring an external VCAP capacitor - value and ESR requirements are specified in the Microchip family datasheet and must not be substituted with a generic ceramic without checking stability. Estimated: with 8 KB RAM and 70 MIPS operation, core current is in the tens-of-milliamps range; verify exact ICC figures in the datasheet DC Characteristics section rather than relying on estimates.
For digital power layouts, keep the high-speed PWM output traces to gate drivers short and route them away from ADC/PGA sense lines. The interconnected PWM-to-ADC trigger path benefits from layout symmetry when multiple phases are used: match trace lengths for phase-current sensing into the PGA inputs to preserve sampling accuracy. Place the 44-TQFP (10x10 mm) with exposed thermal dissipation through standard land pattern per the datasheet; a solid ground plane under the controller reduces EMI from fast PWM edges.
Do not confuse package variants: DSPIC33EP128GS804T-I/ML is a 44-QFN (8x8 mm) and will NOT fit a TQFP-44 footprint. Second, the 'T' suffix means tape and reel - for hand assembly or prototyping, the tray-packaged DSPIC33EP128GS804-I/PT is more convenient and identical functionally. Third, follow Microchip's device configuration guidance for oscillator setup to actually achieve 70 MIPS; the internal PLL multiplication factor must be set correctly in configuration words, and an incorrect PLL setting is the most common bring-up failure on dsPIC33E designs.
Compliance Information
Compliance status not stated in the verified web data for this exact order code; confirm on the Microchip product page for DSPIC33EP128GS804T-I/PT.
