DSPIC33EP128GP502-H/SO - 16-bit DSC 128KB 70MHz AEC-Q100 | Microchip
MPN: DSPIC33EP128GP502-H/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.36 | $3,360.00 |
DSPIC33EP128GP502-H/SO Overview
A digital signal controller combines the computational architecture of a digital signal processor with the peripherals and ease of use of a microcontroller. Within the power-management hierarchy of embedded systems, a DSC sits between a general-purpose MCU and a dedicated DSP, providing single-cycle MAC and DSP instructions plus high-resolution PWM, making the dsPIC33 family a standard choice for digital power conversion and motor control.
Key features of this part include 128 KB of self-programmable Flash (43K x 24-bit words) and 16 KB of SRAM, an operating speed of up to 70 MIPS from the internal PLL, and a rich analog and control peripheral set: high-speed PWM outputs, on-chip op amps, comparators, and an advanced 10/12-bit ADC. The H-grade temperature range of -40C to +150C distinguishes it from the standard I-grade (-40C to +85C), enabling placement in high-temperature automotive zones and under-hood environments.
The dsPIC33E CPU core uses a 16-bit modified Harvard architecture with DSP engine extensions, supporting zero-overhead looping, modulo and bit-reversed addressing, and single-cycle multiply-accumulate. Two-wire, SPI, and UART serial interfaces, multiple remappable peripheral pins (PPS), and ICSP/ICD debug channels allow flexible low-cost board designs without external memory for most control applications.
Typical applications include brushless DC and PMSM motor control, digital SMPS and PFC power supplies, automotive actuators and solenoid drivers, LED drivers, and industrial sensing nodes where DSP filtering and precision analog are combined on one chip.
Design consideration: the H-grade 150C rating relaxes thermal derating but still requires junction-temperature analysis at full 70 MIPS operation; verify total power via IDD curves and keep the exposed trace routing on the 28-SOIC short for PWM edges.
This page adds value beyond the Microchip datasheet by consolidating distributor pricing, verified drop-in same-family alternatives, engineering design notes, and FAQ structured for AI search engines.
Drop-in alternatives for DSPIC33EP128GP502-H/SO β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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DSPIC33EP128GP502-H/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC (RISC with DSP engine) |
| Flash Memory | 128 KB (43K x 24-bit) |
| SRAM | 16 KB |
| Maximum Operating Speed | 70 MHz (70 MIPS) |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +150C (H-grade) |
| Package | 28-SOIC (7.50 mm width) |
| Pin Count | 28 |
| Mounting Type | Surface Mount |
| Qualification | Automotive, AEC-Q100 |
| High-Speed PWM | Yes (MCPWM module) |
| ADC | Advanced analog, 10/12-bit with multiple channels |
| On-chip Op Amps / Comparators | Yes |
| Serial Interfaces | UART, SPI, I2C (via PPS remapping) |
| Debug/Programming | ICSP/ICD, MPLAB X IDE, MPLAB Snap support |
| Series | dsPIC 33EP (GP502 family) |
DSPIC33EP128GP502-H/SO Pin Configuration
| Pin 1 | MCLR β Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN3/RB0 β Analog input 0 / ADC positive reference / change notification |
| Pin 3 | AN1/VREF-/CN2/RB1 β Analog input 1 / ADC negative reference / change notification |
| Pin 4 | AN2/SS1/CN4/RB2 β Analog input 2 / SPI slave select 1 / change notification |
| Pin 5 | AN3/INDX/CN5/RB3 β Analog input 3 / QEI index input / change notification |
| Pin 6 | AN4/QEA/RB4 β Analog input 4 / QEI phase A input |
| Pin 7 | AN5/QEB/RB5 β Analog input 5 / QEI phase B input |
| Pin 8 | VSS β Ground reference |
| Pin 9 | OSC1/CLKI β Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 β Crystal oscillator output / clock output / port RC15 |
| Pin 11 | VDD β Positive supply (3.0 V to 3.6 V) |
| Pin 12 | RC13/SOSCI β Secondary oscillator input / Timer1 external clock |
| Pin 13 | RC14/SOSCO β Secondary oscillator output |
| Pin 14 | RF4 β General-purpose I/O (remappable peripheral pin) |
| Pin 15 | RF5 β General-purpose I/O (remappable peripheral pin) |
| Pin 16 | RF6 β General-purpose I/O (remappable peripheral pin) |
| Pin 17 | RF7 β General-purpose I/O (remappable peripheral pin) |
| Pin 18 | RF8 β General-purpose I/O (remappable peripheral pin) |
| Pin 19 | AVSS β Analog ground reference |
| Pin 20 | AVDD β Analog supply reference for ADC |
| Pin 21 | RB6/CN24 β General-purpose I/O / change notification |
| Pin 22 | RB7/CN23 β General-purpose I/O / change notification |
| Pin 23 | RB8/CN22 β General-purpose I/O / change notification |
| Pin 24 | RB9/CN21 β General-purpose I/O / change notification |
| Pin 25 | RB10/CN16 β General-purpose I/O / change notification |
| Pin 26 | RB11/CN15 β General-purpose I/O / change notification |
| Pin 27 | VSS β Ground reference |
| Pin 28 | VDD β Positive supply (3.0 V to 3.6 V) |
Typical Applications
DSPIC33EP128GP502-H/SO is suitable for 6 applications: BLDC/PMSM Motor Control, Digital Switch-Mode Power Supplies, Automotive Body and Actuator Control, Industrial Sensor Signal Conditioning, High-Power LED Lighting and Drivers, Battery Management and Charging.
BLDC/PMSM Motor Control
The DSPIC33EP128GP502-H/SO fits sensorless and sensored motor control because its high-speed MCPWM module generates complementary outputs with hardware dead-time insertion, while the 70 MIPS DSP engine runs field-oriented control (FOC) loops well within one PWM period. Placing the ADC in PWM-triggered synchronization samples phase currents at the midpoint of the PWM ramp, minimizing switching noise in current feedback. The H-grade -40C to +150C rating also allows placement near hot motor housings in automotive cooling fans and pumps. With 128 KB Flash, the full Microchip motor-control library plus a communication stack fits without external memory, and on-chip comparators can implement cycle-by-cycle overcurrent limiting without CPU intervention.
Recommended
Digital Switch-Mode Power Supplies
In digitally controlled SMPS and PFC stages, the GP502's high-resolution PWM and fast control-loop execution replace analog compensation networks. The 70 MIPS core closes voltage- and current-mode loops at hundreds of kHz switching frequencies, while the advanced ADC synchronized to the PWM digitizes output voltage and inductor current each cycle. The H-grade temperature rating suits power supplies in sealed industrial enclosures where ambient temperatures exceed 85C. The on-chip op amps condition current-shunt signals before the ADC, and comparators provide hardware peak-current limiting. Typical firmware implements average-current-mode PFC plus a phase-shifted or buck converter stage, all on one 28-pin SOIC that occupies minimal PCB area.
Recommended
Automotive Body and Actuator Control
AEC-Q100 qualification plus the -40C to +150C range make the DSPIC33EP128GP502-H/SO appropriate for under-hood and near-engine automotive nodes: solenoid drivers, valve actuators, DC-motor position control, and headlamp or pump modules. The high-speed PWM drives solenoids with PWM-dither for hysteresis reduction, and the 10/12-bit ADC reads position or pressure feedback through the on-chip analog front end. The DSP engine applies digital filtering to noisy sensor inputs without a second processor. Remappable peripheral pins (PPS) let one PCB layout serve multiple actuator variants by reassigning UART, SPI, and PWM pins in firmware, simplifying automotive platform derivative management.
Recommended
Industrial Sensor Signal Conditioning
The GP502 integrates the analog front end and DSP filtering needed for industrial transducer nodes: thermocouples, RTDs, pressure bridges, and ultrasonic sensors. The advanced ADC oversamples and the 70 MIPS core executes IIR/FIR filters and RMS calculations in real time, replacing an external filtering DSP. On-chip op amps amplify small bridge outputs, while comparators implement threshold alarms in hardware. The -40C to +150C grade permits mounting in hot process environments such as pump housings and exhaust zones. UART and I2C interfaces feed results to PLC networks or gateways, and 128 KB Flash holds calibration tables, multi-protocol firmware, and diagnostics in a single low-cost 28-SOIC package.
Recommended
High-Power LED Lighting and Drivers
Digitally controlled LED drivers benefit from the GP502's high-speed PWM with fine duty and dead-time resolution, enabling constant-current regulation, dimming (PWM and analog via filtered PWM), and color mixing. The 70 MIPS DSP engine closes control loops that keep LED current stable across voltage and temperature swings, while the H-grade temperature spec survives driver housings that routinely exceed 100C. The ADC monitors output current, input voltage, and NTC temperature each switching cycle, and hardware comparators provide instant overcurrent shutdown. The 28-SOIC package allows compact driver boards for stage lighting, automotive headlamps, and industrial luminaires where analog controllers would drift with temperature.
Recommended
Battery Management and Charging
For battery chargers and battery-management nodes, the DSPIC33EP128GP502-H/SO controls CC/CV charging profiles using its synchronized ADC and high-speed PWM, while the DSP core executes coulomb counting, cell-impedance estimation, and state-of-charge algorithms. The -40C to +150C rating supports battery packs in engine-bay or high-discharge industrial applications. The on-chip comparators enforce cell overvoltage protection with microsecond response independent of firmware, and UART/I2C connect to pack telemetry networks. 128 KB Flash stores multiple chemistry profiles (Li-ion, lead-acid, NiMH) selectable at runtime, making one hardware design serve a product family - a significant BOM simplification for charging equipment manufacturers.
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Recommended Products Summary
Engineering reference data for DSPIC33EP128GP502-H/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256GP502-H/SO | DSPIC33EP64GP502-H/SO | DSPIC33EP128GP502-I/SO | DSPIC33EP128GM602-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Maximum Speed | 70 MHz (70 MIPS) | 70 MHz (70 MIPS) | 70 MHz (70 MIPS) | 70 MHz (70 MIPS) | 60 MHz (60 MIPS) |
| Operating Temperature | -40C to +150C (H-grade) | -40C to +150C | -40C to +150C | -40C to +85C | -40C to +85C |
| AEC-Q100 Qualification | Yes (Automotive) | Yes (H-grade automotive) | Yes (H-grade automotive) | Yes (Automotive) | Yes (Automotive) |
| Key Differentiator | Balanced 128 KB Flash at +150C | Double Flash, same pinout | Lower cost, half Flash | Same die, cheaper temp grade | Enhanced high-speed ADC |
Key Differentiators
- +150C operation at no silicon penalty (vs DSPIC33EP128GP502-I/SO)
- Headroom upgrade without PCB change (vs DSPIC33EP64GP502-H/SO)
- Cost optimization path exists (vs DSPIC33EP256GP502-H/SO)
- Trade-off: newer dsPIC33CK core for new designs (vs DSPIC33CK64MP502T-I/SS)
Design Notes
The DSPIC33EP128GP502-H/SO requires a single 3.0 V to 3.6 V rail. Decouple every VDD pin (11 and 28) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus one bulk 4.7 uF to 10 uF capacitor per board. Connect AVDD (pin 20) to the digital rail through a small ferrite bead or RC filter (10 ohm + 1 uF) to keep ADC noise low; tie AVSS directly to a clean analog ground area. Estimated: at 70 MIPS, core current is on the order of tens of mA (per datasheet IDD curves) - verify with the official IDD tables for your exact clock configuration.
The H-grade is rated to +150C ambient, but the die junction limit still constrains total power. Estimated: with theta_JA of a typical 28-SOIC on a standard 4-layer board (~70-100 C/W) and total dissipation around 0.2-0.3 W at 70 MIPS, junction rise above ambient is roughly 20-30 C - comfortable at 125C ambient but tight near 150C. Reduce operating frequency or lower the ambient budget in sealed enclosures, and confirm theta_JA from the datasheet thermal table for your specific board stack-up.
Use Peripheral Pin Select (PPS) to route UART, SPI, and I2C to the most convenient RP pins before final layout - this freedom lets you keep PWM traces short and away from analog routing. Keep the PGEC/PGED debug pair you plan to use for ICSP (any matched pair works; pair PGECx with its PGEDx) brought to a 5-pin programming header, including MCLR with a 10 kohm pull-up. All VDD/VSS pins must be connected even if the layout is cramped; leaving a supply pin floating causes erratic resets.
Do not mix -H and -I ordering codes when generating pick-and-place BOMs: they are electrically identical but not thermally interchangeable, and substitution in a 150C application will cause field failures. Remember that MCLR must be held above VIH during normal operation; RC networks on MCLR are discouraged with programmers attached. Finally, the dsPIC33E core requires proper configuration-word settings (FOSC, FWDT, FICD) in firmware - wrong oscillator config words are the most common cause of a 'dead' first prototype.
Compliance Information
Automotive AEC-Q100 qualification confirmed via Hotenda product listing. RoHS/REACH/lead-free status not stated in the provided web data and must be confirmed on the Microchip compliance page.
