DSPIC33EP64GS805-I/PT
DSPIC33EP64GS805-I/PT - 70 MIPS 16-bit DSC, 64KB Flash | Microchip
The Microchip Technology DSPIC33EP64GS805-I/PT is a 16-bit Digital Signal Controller (DSC) optimized for Switch-Mode Power Supply (SMPS) and digital power conversion, integrating 64 KB of Flash program memory, 8 KB of RAM, a 70 MIPS dsPIC33EP core, and dedicated high-speed peripherals such as interconnected high-speed PWM, 12-bit ADC, programmable gain amplifier (PGA), and analog comparators. Housed in a 48-pin TQFP (7x7 mm) package, the device runs from a 3.0 V to 3.6 V supply and is qualified for industrial temperature operation (-40 °C to +85 °C).
A Digital Signal Controller is a hybrid device that combines a microcontroller's deterministic interrupt handling and peripheral set with a DSP's single-cycle MAC engine, instruction cache, and wide datapath. Within the broader taxonomy, the dsPIC33EP64GS805 sits in the chain: DSC → digital power MCU → SMPS controller → power management IC → semiconductor. Its purpose is to close multi-loop digital control loops (voltage-mode, current-mode, PFC, LLC, full-bridge) at the switching frequencies required by modern power converters.
Key differentiating features of the DSPIC33EP64GS805 include its 4 PWM generators with 8 outputs that can be paired to produce up to 8 duty-cycle-matched or phase-shifted channels; a 12-bit ADC with up to 12.5 Msps throughput and dedicated S&H; integrated PGA stages on the analog inputs to handle small current-sense signals directly; dual analog comparators with DAC references for cycle-by-cycle current limiting; CAN 2.0B connectivity for networked power systems; and a Functional Safety (FuSa) capable architecture supporting Class B safety design patterns. The device also includes a 16-bit wide data path, single-cycle 16x16 MAC, and zero-overhead hardware loops for jitter-free control loop execution.
Architecturally, the part belongs to the dsPIC33EPXXXGS70X/80X family, which uses a Harvard architecture with separate program and data buses plus a DMA engine, and pairs it with a dual-partition Flash that allows live firmware updates without shutting the power supply down. The integrated peripherals are pre-wired to minimize latency between the ADC sample, the PWM update, and the comparator trip event - a critical factor when running multi-hundred kHz control loops.
Typical applications for the DSPIC33EP64GS805-I/PT include AC/DC and DC/DC converters (PFC + LLC totem-pole), uninterruptible power supplies (UPS), solar inverters, battery chargers, LED lighting drivers, induction heating, and digital welding controls. It is also used in industrial motor drives and Class B safety-relevant power architectures where the FuSa capability shortens certification time.
When designing with this part, place the analog grounds and digital grounds on a single, unbroken split-ground plane joined directly under the IC's GND pin, and route the ADC sense traces as a short differential pair from the current shunt to the dedicated ANx/PGA inputs. Use the dual-partition Flash feature to deploy safety patches and tuning coefficients in the field without interrupting the converter output.
This page synthesizes distributor pricing, verified same-family and drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Cotação
Contato