DSPIC33EP16GS502-E/SO - 16-Bit DSC, 70 MIPS, Digital Power | Microchip
MPN: DSPIC33EP16GS502-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.21 | $42.10 |
| 100 | $3.79 | $379.00 |
| 500 | $3.42 | $1,710.00 |
| 1,000 | $3.08 | $3,080.00 |
DSPIC33EP16GS502-E/SO Overview
A Digital Signal Controller combines the computational core of a Digital Signal Processor with the peripherals and deterministic control architecture of a microcontroller. Within the power-management hierarchy, a DSC sits at the heart of switch-mode power conversion systems: it closes the control loop for buck, boost, PFC and LLC stages, replacing analog control ICs with firmware-based control laws such as voltage-mode, current-mode or digital PID.
The GS-series differentiator is its interconnected high-Speed PWM module, which supports complementary outputs, dead-time insertion, phase shifting and fault coupling - features purpose-built for digital power topologies. The part also integrates a high-speed 12-bit ADC with a programmable gain amplifier (PGA) and analog comparators, enabling tight, low-latency current sensing directly inside the control loop.
Architecturally, the dsPIC33EP core executes an enhanced 16-bit instruction set with DSP multiply-accumulate instructions and two address generation units, sustaining single-cycle MAC operations needed by predictive or adaptive control algorithms. The ADC-to-PWM trigger interconnect minimizes conversion-to-output latency, a critical parameter for loop stability at switching frequencies in the hundreds of kilohertz.
Typical applications include interleaved power factor correction (Microchip publishes an interleaved PFC reference design for this family), digital AC-DC and DC-DC power supplies, battery chargers, LED drivers, solar micro-inverters and industrial power conversion.
For design, pay close attention to the ADC sampling-to-PWM-update timing budget: clock the ADC synchronously with the PWM period trigger to avoid jitter-induced output ripple, and use the comparators' fast fault path rather than software interrupts for over-current shutdown.
This page synthesizes distributor pricing, drop-in family alternatives, and practical digital-power design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP16GS502-E/SO — 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 DSPIC33EP16GS502-E/SO (same form factor and footprint) — differing in Package, Core, Functional Safety Support, Operating Temperature, Program Memory (FLASH).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS502-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33EP64GS502-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.3 / Unit
View Datasheet →DSPIC33EP16GS502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.31 / Unit
View Datasheet →DSPIC33EP16GS502T-E/SO
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →DSPIC33EP32MC502-I/SO
✅ Drop-In✓ In Stock
$2.66 / Unit
View Datasheet →DSPIC33EP128MU502-E/SO
✅ Drop-In✓ In Stock
$3.12 / Unit
View Datasheet →DSPIC33EP16GS502-E/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC33EP 16-bit DSC |
| Maximum CPU Speed | 70 MIPS |
| Program Memory (Flash) | 16 KB (16K x 8) |
| ADC Resolution | 12-bit (high-speed, with PGA) |
| PWM | Interconnected high-Speed PWM for digital power |
| Analog Comparators | Yes (on-chip) |
| Temperature Range | -40C to +125C (E grade) |
| Qualification | Automotive, AEC-Q100 qualified |
| Package | 28-SOIC (SOIC-W, gull wing) |
| Terminal Form | Gull wing |
| Mounting Type | Surface Mount |
| Number of Terminals | 28 |
| Functional Safety | FuSa supported (per family listing) |
| Typical Application Domain | Digital power, SMPS, PFC |
DSPIC33EP16GS502-E/SO 28-soic (soic-w, gull wing) Pin Configuration Guide
Pin configuration for DSPIC33EP16GS502-E/SO (28-soic (soic-w, gull wing) 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 DSPIC33EP16GS502-E/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP16GS502-E/SO is suitable for 6 applications: Interleaved Power Factor Correction (PFC), Digital AC-DC Power Supplies, DC-DC Converters and Point-of-Load, Battery Chargers (Li-Ion / Lead-Acid), Digital LED Drivers and Lighting, Solar Micro-Inverters and Power Optimization.
Interleaved Power Factor Correction (PFC)
Microchip publishes an interleaved PFC reference design for the dsPIC33EPXXGS50X family, and the DSPIC33EP16GS502-E/SO is a direct fit. Its interconnected high-Speed PWM generates two phase-shifted channels for interleaved boost stages, while the 12-bit high-speed ADC with PGA samples input current each switching cycle for the inner current loop. The comparators provide cycle-by-cycle over-current limiting without CPU intervention. Firmware-based control (average current mode) adapts to wide universal-line inputs (85-265 VAC); keep the ADC trigger synchronous with the PWM period to prevent sampling jitter from distorting the current waveform.
Recommended
Digital AC-DC Power Supplies
In off-line AC-DC adapters and server front ends, the DSPIC33EP16GS502-E/SO replaces analog PWM controllers with firmware control, enabling adaptive burst mode, constant-current/constant-voltage profiles and digital telemetry. The interconnected high-Speed PWM supports complementary outputs with programmable dead time for synchronous rectification, and the ADC+PGA chain reads output voltage and current at loop bandwidth. The -40C to +125C AEC-Q100 rating permits mounting near hot secondary-side regions. Budget the loop: at 70 MIPS and PWM frequencies up to several hundred kHz, single-cycle MAC math leaves ample cycles for PID plus protection state machines.
Recommended
DC-DC Converters and Point-of-Load
For 48 V-to-12 V bus converters and telecom power bricks, the DSPIC33EP16GS502-E/SO closes voltage- or current-mode loops digitally. The PWM-to-ADC trigger interconnect keeps sampling aligned to the switching instant, reducing effective conversion latency - the main benefit over general-purpose MCUs. On-chip comparators implement fast over-current shutdown ahead of the software loop, and soft-start/soft-stop, phase shedding and nonlinear gain scheduling are all firmware features. The 16 KB Flash typically suffices for a single-output converter with protection and housekeeping; choose 32/64 KB variants if multi-rail sequencing is added.
Recommended
Battery Chargers (Li-Ion / Lead-Acid)
Charger algorithms (CC-CV, trickle, temperature-qualified fast charge) map naturally onto the DSPIC33EP16GS502-E/SO: the 12-bit ADC with PGA measures battery current and voltage precisely, while the PWM drives the buck charging stage with synchronous rectification. Digital implementation allows charge-profile customization per chemistry and per-cell telemetry without redesigning analog compensation. The 28-SOIC gull-wing package suits compact charger PCBs, and AEC-Q100 qualification supports automotive on-board charger sub-functions. Use the comparators for hardware-level reverse-polarity or over-current fault response; keep firmware fault handling as a second layer.
Recommended
Digital LED Drivers and Lighting
High-brightness LED drivers benefit from the DSPIC33EP16GS502-E/SO's combination of fast PWM dimming control and closed-loop current regulation. The interconnected high-Speed PWM supports both the power-conversion switching channel and independent dimming channels, and the ADC senses LED stack current for constant-current accuracy. Firmware dimming curves (0-10 V, DALI-like behavior, or PWM-input dimming) are implemented in software, avoiding dedicated dimming ICs. The -40C to +125C range tolerates luminaire enclosures, and 16 KB Flash is generally adequate for dimming curves plus protection. Watch ADC reference stability for dimming uniformity at low currents.
Recommended
Solar Micro-Inverters and Power Optimization
Panel-level power electronics require MPPT algorithms running on top of fast switching control - a workload the DSPIC33EP16GS502-E/SO handles with its 70 MIPS DSP core executing single-cycle MAC-heavy MPPT math while the interconnected high-Speed PWM drives the boost and inverter stages with appropriate dead time and phase relationships. The 12-bit ADC monitors panel voltage/current and grid-side feedback; comparator-based fault paths protect against grid anomalies. Extended temperature rating suits outdoor-mounted enclosures. Note 16 KB Flash constrains grid-code compliance logic; the pin-compatible 32/64 KB GS502 variants provide headroom for certified grid-interconnect firmware.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP16GS502-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS502-E/SO | DSPIC33EP64GS502-E/SO | DSPIC33EP16GS502-I/SO | DSPIC33EP32MC502-I/SO | DSPIC33EP128MU502-E/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (gull wing) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 32 KB | 64 KB | 16 KB | 32 KB | 128 KB |
| Interconnected High-Speed PWM (digital power) | Yes | Yes | Yes | Yes | No (MC-family motor-control PWM) | No |
| Temperature Range | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| ADC with PGA + Comparators (GS analog front end) | Yes | Yes | Yes | Yes | No | No |
| Digital Power Suitability | Purpose-built (GS family, PFC reference design) | Purpose-built | Purpose-built | Purpose-built | Motor control only - functional equivalent | General purpose/USB - not for SMPS control |
Key Differentiators
- GS-family interconnected high-Speed PWM purpose-built for digital power (vs DSPIC33EP32MC502-I/SO)
- AEC-Q100 automotive qualification with -40C to +125C (vs DSPIC33EP16GS502-I/SO)
- Lowest-cost entry point in the GS502 SOIC-28 family (vs DSPIC33EP32GS502-E/SO)
- Integrated ADC + PGA + comparators analog front end (vs DSPIC33EP128MU502-E/SO)
Design Notes
Synchronize ADC sampling to the PWM period trigger using the GS family's PWM-to-ADC trigger interconnect rather than free-running the ADC. Sampling at a fixed phase within each switching cycle eliminates aliasing of switching ripple into the control loop and keeps the effective conversion latency constant - the key to stable loops at several-hundred-kHz switching frequencies. Per the dsPIC33EPXXGS50X family data sheet (70005127d), route the current-sense signal to the PGA input with a short, kelvin-connected shunt layout to preserve 12-bit accuracy.
Do not rely on software interrupts for over-current protection. Even at 70 MIPS, interrupt latency plus ADC conversion time can allow fault current to persist for multiple switching cycles. Use the on-chip analog comparators' direct fault coupling to the PWM module for cycle-by-cycle current limiting, and reserve firmware protection for slower, latched faults (over-temperature, sustained over-voltage). This is the standard pattern in Microchip's digital power reference designs, including the family's interleaved PFC design.
Place a 0.1 uF ceramic decoupling capacitor within 2-3 mm of each VDD pin with a low-impedance return to VSS, and keep the analog supply domain (ADC/PGA reference) separated from the PWM gate-driver supply path on the layout. Route PWM outputs away from ADC input traces to prevent coupling of switching edges into current-sense signals. The 28-SOIC gull-wing footprint has no exposed pad, so all heat exits through the leads - allow generous copper on power pins and avoid placing the DSC adjacent to hot rectifiers in -40C to +125C (E-grade) applications.
Estimated: if firmware uses flash-density headroom poorly (frequent flash self-write), reserve the lower-power idle/doze modes between PWM updates - at 70 MIPS the core is fast enough that most loops complete in a small fraction of the switching period, so clock-gating between conversions measurably reduces controller dissipation. Verify final supply budget against the family data sheet current-consumption tables rather than this estimate.
Compliance Information
Automotive AEC-Q100 qualification and -40C to +125C extended temperature grade confirmed via FindIC/distributor data. RoHS/REACH/lead-free status not stated in provided data - confirm on Microchip product page.
