DSPIC33CK128MP502-I/2N - 100MHz 128KB DSC, CAN-FD | Microchip
MPN: DSPIC33CK128MP502-I/2N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.18 | $41.80 |
| 100 | $3.74 | $374.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $3.05 | $3,050.00 |
DSPIC33CK128MP502-I/2N Overview
A digital signal controller combines the computational capability of a 16-bit digital signal processor with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP: it executes real-time control loops (such as current loops in switch-mode power supplies) with cycle-accurate PWM, while retaining GPIO, communication and sensing peripherals on the same silicon. The dsPIC33C family is Microchip's third-generation DSC platform aimed squarely at digital power, motor control and advanced sensing.
Key features of the DSPIC33CK128MP502 include a 100 MHz core delivering 100 MIPS of DSP performance, dual-panel flash enabling live firmware updates, a CAN Flexible Data-rate (CAN FD) controller for industrial and automotive networking, two internal analog op-amps for current-sense amplification, high-resolution PWM outputs, and 12-bit ADCs for high-speed feedback sampling.
Architecturally, the dsPIC33CK core supports DSP instructions (MAC, multiply) and barrel shifters for control-law computation, while the dual-panel flash architecture allows one panel to execute code while the other is reprogrammed, supporting field upgrades without downtime. The high-resolution PWM peripheral provides fine edge placement needed for phase-shifted and interleaved topologies.
Typical applications include digital switched-mode power supplies (AC-DC, DC-DC), PFC stages, brushless DC and PMSM motor control, battery chargers, LED drivers, and CAN FD-connected industrial sensing and control nodes.
A key design consideration: the internal op-amps reduce external component count in current-sense paths, but verify bandwidth requirements at your PWM switching frequency. Place the VCAP stabilizer capacitor exactly per the datasheet layout guidelines, as it is critical for core-voltage stability at 100 MHz operation.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK128MP502-I/2N — 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 DSPIC33CK128MP502-I/2N (same form factor and footprint) — differing in Package, Core, CAN Interface, Supply Voltage, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MP502-E/2N
✅ Drop-In✓ In Stock
$3.02 / Unit
View Datasheet →DSPIC33CK128MP502-H/2N
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MP202-I/2N
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33CK64MP502-I/2N
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33CK256MP502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MP502-I/2N Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33C DSC core |
| Maximum Clock Frequency | 100 MHz |
| Program Memory (Flash) | 128 KB (dual-panel) |
| RAM | 16 KB |
| Supply Voltage | 3.3 V |
| Package | 28-UQFN (6x6 mm) Exposed Pad |
| CAN Interface | CAN FD |
| ADC Resolution | 12-bit |
| On-chip Op-Amps | Yes (analog op-amps integrated) |
| PWM | High-Resolution PWM |
| Operating Temperature | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| Terminal Pitch | 0.65 mm |
| Packaging | Tube |
| Product Family | dsPIC33CK Digital Signal Controllers |
| Estimated Program Memory Cycles | 16-bit CISC instruction set with DSP extensions |
DSPIC33CK128MP502-I/2N Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | RA0/AN0 — Port A I/O, analog input 0, comparator 1 input A |
| Pin 3 | RA1/AN1 — Port A I/O, analog input 1, comparator 1 input B |
| Pin 4 | RB0/AN2/PGD1 — Port B I/O, analog input 2, debug data pin 1 |
| Pin 5 | RB1/AN3/PGC1 — Port B I/O, analog input 3, debug clock pin 1 |
| Pin 6 | RB2/AN4 — Port B I/O, analog input 4, comparator input |
| Pin 7 | VDD — Positive supply (3.3 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pin 11 | RB3/RP — Port B I/O, remappable peripheral pin |
| Pin 12 | RB4/RP — Port B I/O, remappable peripheral pin |
| Pin 13 | RB5/RP — Port B I/O, remappable peripheral pin |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RB6 — Port B I/O |
| Pin 16 | RB7 — Port B I/O |
| Pin 17 | RB8/RP — Port B I/O, remappable peripheral pin |
| Pin 18 | RB9/RP — Port B I/O, remappable peripheral pin |
| Pin 19 | RB10/RP — Port B I/O, remappable peripheral pin |
| Pin 20 | RB11/RP — Port B I/O, remappable peripheral pin |
| Pin 21 | RB12/AN — Port B I/O, analog capable |
| Pin 22 | RB13/AN — Port B I/O, analog capable |
| Pin 23 | RB14/RP — Port B I/O, remappable peripheral pin |
| Pin 24 | RB15/RP — Port B I/O, remappable peripheral pin |
| Pin 25 | RB15b/RP — Port B I/O, remappable peripheral pin |
| Pin 26 | VCAP — Core voltage stabilizer capacitor connection |
| Pin 27 | AVDD — Analog supply |
| Pin 28 | AVSS — Analog ground |
Typical Applications
DSPIC33CK128MP502-I/2N is suitable for 6 applications: Digital Switch-Mode Power Supplies, Brushless DC and PMSM Motor Control, Power Factor Correction (PFC) Stages, Battery Chargers and BMS Nodes, Industrial Sensing and CAN FD Control Nodes, LED Drivers and Smart Lighting.
Digital Switch-Mode Power Supplies
The DSPIC33CK128MP502-I/2N fits digital SMPS designs because its 100 MHz core closes current- and voltage-loop feedback with DSP MAC instructions in real time, while the high-resolution PWM delivers the fine edge resolution needed for phase-shifted full-bridge, LLC and buck topologies at hundreds of kilohertz switching frequencies. The 12-bit ADC samples output voltage and shunt currents synchronously with the PWM period, enabling peak-current-mode or predictive control laws in firmware. In a typical topology the DSC replaces analog compensators and hard-coded PWM controllers, allowing one firmware platform to serve multiple power ratings. The trade-off versus a fixed-function controller is software development effort, but dual-panel flash enables field firmware updates for efficiency tuning or standards changes without hardware revision.
Recommended
Brushless DC and PMSM Motor Control
For BLDC and PMSM drives, the DSPIC33CK128MP502-I/2N executes field-oriented control (FOC) at 100 MHz, with the integrated op-amps amplifying low-side shunt currents directly, eliminating external amplifier ICs and reducing BOM cost in space-constrained inverter boards. The high-resolution PWM generates precise complementary gate signals with programmable dead-time for the three-phase bridge, and the 12-bit ADC synchronizes phase-current sampling to the PWM center to avoid switching noise. The 16 KB RAM accommodates position observers and sensorless estimators. The CAN FD interface connects the drive to industrial fieldbus or automotive networks. Designers should verify op-amp bandwidth against motor electrical frequency; if insufficient, the MP202 pin-compatible variant plus external amplifiers is an alternative architecture.
Recommended
Power Factor Correction (PFC) Stages
In AC-DC front ends, the DSPIC33CK128MP502-I/2N implements boost-PFC control with average-current-mode or transition-mode algorithms executed in the 100 MHz core. The 12-bit ADC acquires input voltage, inductor current and bus voltage with programmable sample triggers, while the high-resolution PWM shapes the boost switch duty with the fine resolution needed to minimize THD at light load. Firmware-based control allows adaptive mode switching (CCM/DCM) and digital compensation across universal input ranges that fixed analog PFC chips cannot match. The CAN FD interface reports power quality in server and telecom power systems. Thermal design is straightforward since the DSC only processes signals, but layout must keep the shunt sense traces Kelvin-connected to preserve ADC accuracy at high di/dt.
Recommended
Battery Chargers and BMS Nodes
The DSPIC33CK128MP502-I/2N supports multi-chemistry battery charging by running CC/CV/cut-off state machines in firmware with adaptive charge profiles. Its 12-bit ADC measures pack voltage and current through the integrated op-amps, and the high-resolution PWM regulates a synchronous buck charger stage with programmable frequency to balance efficiency against EMI. The CAN FD interface is valuable in e-mobility and energy-storage systems where charger-to-BMS communication uses CAN, and the dual-panel flash permits safety-relevant firmware updates in the field. For automotive charging environments, the -H/2N AEC-Q100 variant with 150C capability should be selected instead of the -I/2N. Charge-current accuracy depends on shunt sizing; keep full-scale near the ADC input range for best resolution.
Recommended
Industrial Sensing and CAN FD Control Nodes
As a general industrial node, the DSPIC33CK128MP502-I/2N combines local 12-bit ADC sensing (with on-chip op-amps conditioning bridge or shunt signals) with CAN FD connectivity for factory automation, HVAC and process-control equipment. The 100 MHz core runs filtering (IIR/FIR), basic diagnostics and protocol stacks concurrently while the remappable I/O pins configure UART, SPI, I2C and PWM on the 28-pin package without external glue logic. The -40C to +85C industrial temperature rating suits unconditioned cabinets. Firmware flexibility means one PCB serves multiple sensor variants by changing code, and the dual-panel flash enables live updates across a CAN bus fleet. For communication-heavy nodes, confirm CAN FD data-phase bit timing against cable length and transceiver specifications during system bring-up.
Recommended
LED Drivers and Smart Lighting
In high-power LED drivers, the DSPIC33CK128MP502-I/2N regulates constant current through a buck or boost stage using its high-resolution PWM, achieving the fine duty resolution needed to eliminate low-frequency flicker and support dimming to deep percentages. The 12-bit ADC closes the current loop with the integrated op-amps amplifying shunt feedback, and firmware implements dimming curves, temperature derating from an NTC input, and DALI or DMX protocols over its communication peripherals, with CAN FD used in architectural lighting networks. The dual-panel flash lets installed luminaires receive color-tuning or standards updates over the network. Switching-frequency selection trades efficiency against EMI filter size; the high-resolution PWM supports spread-spectrum dithering in firmware to ease conducted-emissions compliance.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MP502-I/2N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MP502-E/2N | DSPIC33CK128MP502-H/2N | DSPIC33CK128MP202-I/2N | DSPIC33CK64MP502-I/2N |
|---|---|---|---|---|---|
| Package | 28-UQFN (6x6) Exposed Pad | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Integrated Op-Amps | Yes | Yes | Yes | No | Yes |
| CAN FD | Yes | Yes | Yes | Yes | Yes |
| Temperature Range | -40C to +85C (Industrial) | Extended grade | -40C to +150C, AEC-Q100 | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No |
Key Differentiators
- Integrated analog op-amps reduce BOM in current-sense designs (vs DSPIC33CK128MP202-I/2N)
- Automotive qualification option in identical footprint (vs DSPIC33CK128MP502-H/2N)
- Dual-panel flash enables live field firmware updates (vs DSPIC33CK64MP502-I/2N)
Design Notes
The VCAP pin requires a low-ESR ceramic stabilizer capacitor (value per the manufacturer datasheet, typically in the microfarad range) connected directly to VSS with the shortest possible trace. At 100 MHz core operation, core-voltage instability from poor VCAP layout is the most common cause of erratic reset and brown-out behavior. Place the exposed pad on a solid ground plane with an array of thermal vias - this grounds the die paddle for both thermal dissipation and signal-integrity return paths. Keep analog AVDD/AVSS routed as a separate filtered supply island when using the 12-bit ADC and internal op-amps for precision measurements.
When using the internal op-amps for current-shunt amplification in motor-control or SMPS designs, route the shunt sense lines as a Kelvin pair directly to the op-amp input pins and filter at the pin with a small RC (e.g., 100 ohm / 1 nF as a starting point, verify against op-amp stability requirements). High di/dt switching nodes couple millivolts of noise into long traces, which the 12-bit ADC will faithfully sample. Synchronize ADC sampling to the PWM center or trigger point using the peripheral trigger system rather than free-running sampling to avoid chopping noise into your control loop.
Estimated: dynamic core current scales linearly with clock frequency, so operating at the full 100 MHz increases supply current substantially versus lower-speed operation; budget the 3.3 V rail with margin per the datasheet current-consumption tables for your actual clock configuration. Decouple VDD with 100 nF ceramic at each supply pin plus bulk capacitance (4.7-10 uF) near the device. If you enable the internal regulator with lower core clock in low-power modes, verify wake-up latency against your control-loop interrupt timing before committing the design.
Do not migrate firmware from the DSPIC33CK128MP502 to the DSPIC33CK128MP202 without auditing analog code paths: the MP202 lacks the integrated op-amps, so op-amp configuration registers are absent and external amplification must be added in hardware. Also note the dual-panel flash partitioning: in unpartitioned mode program memory is a single block, but live-update designs must size each partition against the final firmware footprint - a partition overflow discovered late in development often forces a flash-density change (64/128/256 KB variants) rather than a code optimization effort.
Compliance Information
Compliance data not present in provided web data. The -H/2N family variant is AEC-Q100 qualified; the -I/2N industrial part is not stated as AEC-Q100 in the provided data.
