DSPIC33FJ16GS402-E/SO - 40 MIPS 16-bit SMPS DSC, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS402-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.74 | $57.40 |
| 100 | $4.95 | $495.00 |
| 500 | $4.34 | $2,170.00 |
| 1,000 | $3.88 | $3,880.00 |
DSPIC33FJ16GS402-E/SO Overview
Background Knowledge: A Digital Signal Controller (DSC) is a hybrid architecture that combines a microcontroller (MCU) with a Digital Signal Processor (DSP) on a single core. In the power-conversion domain, DSCs are widely used because SMPS topologies require both deterministic closed-loop control (an MCU strength) and high-throughput math for PID compensation, digital filtering, and PFC algorithms (a DSP strength). The DSPIC33FJ16GS402 belongs to the broader dsPIC33F family, which is a 16-bit Harvard architecture that sits hierarchically as: dsPIC33FJ16GS402 -> dsPIC33F family -> 16-bit DSC -> Microchip DSC portfolio -> embedded controller category.
Key features include up to four 10-bit ADC modules with dedicated Sample-and-Hold and 2×2.7 Msps throughput for multi-loop current/voltage sensing, four analog comparators with a 2.5 ns response time for high-speed peak-current-mode control, four dedicated PWM generators with 7.5 ns resolution, and three 16-bit timer/counters. The device integrates advanced SMPS peripherals such as a 4-channel high-speed PWM, configurable fault inputs, and a programmable dead-time generator that supports interleaved, multi-phase, and full-bridge topologies without external logic.
Architecture deep-dive: The DSPIC33FJ16GS402 implements a Modified Harvard architecture with separate program and data buses, a 16-bit data path, a single-cycle MAC (40-bit accumulator), and barrel shifter. SMPS-specific peripherals - the PWM, ADC, and comparator modules - are tightly coupled via a high-speed Trigger/Sync matrix so that ADC sampling can be triggered by a PWM edge with sub-microsecond deterministic latency. Built-in self-reset brown-out, watchdog timer, and ICD (In-Circuit Debugger) support allow field-updateable firmware in production power supplies.
Typical applications include AC-DC converters, isolated DC-DC modules, Power Factor Correction (PFC) stages, uninterruptible power supplies (UPS), solar inverters, digital lighting ballasts, and high-frequency battery chargers. The wide operating temperature range (extended -40C to +125C) also supports automotive 12 V/24 V power systems and industrial motor-control drives.
When designing with this DSC, allocate PCB area for analog/digital ground separation (AGND/DGND pins) and keep high-current switching traces away from the ADC input pins. Place the VCAP decoupling capacitor (pin 20) close to the regulator core to ensure low-jitter operation of the high-speed PWM and comparator blocks.
This page synthesizes distributor pricing, drop-in SOIC-28 alternatives, and practical design notes - information not found in the Microchip datasheet alone - for engineers comparing the DSPIC33FJ16GS402-E/SO to next-generation dsPIC33CK/CN parts.
Drop-in alternatives for DSPIC33FJ16GS402-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 DSPIC33FJ16GS402-E/SO (same form factor and footprint) — differing in Analog Comparators, Package, ADC, Operating Temperature, PWM Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS402-I/SO
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33FJ16GS402T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-I/MM
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33FJ16GS402-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33 Modified Harvard DSC |
| Program Memory (Flash) | 16 KB |
| Data Memory (RAM) | 2 KB |
| CPU Speed (max) | 40 MIPS |
| Operating Frequency | up to 40 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 21 |
| Package | 28-pin SOIC (/SO) |
| Operating Temperature | -40C to +125C (Extended, "-E") |
| ADC Modules | up to 4 × 10-bit, 2 Msps |
| Analog Comparators | 4 (with 2.5 ns response) |
| PWM Outputs | 4 channels with 7.5 ns resolution |
| 16-bit Timer/Counters | 3 |
| ICSP / ICD Debug | Yes (2-wire programming + debug) |
| RoHS Status | Compliant |
DSPIC33FJ16GS402-E/SO Pin Configuration
| Pin 1 | RGND — Reference ground for regulator core; tie to VSS |
| Pin 2 | RA0/AN0 — Digital I/O / analog input 0 |
| Pin 3 | RA1/AN1 — Digital I/O / analog input 1 |
| Pin 4 | RA2/AN2 — Digital I/O / analog input 2 |
| Pin 5 | RA3/AN3 — Digital I/O / analog input 3 |
| Pin 6 | RA4/AN4 — Digital I/O / analog input 4 |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | AVDD — Analog supply (3.0-3.6 V) |
| Pin 9 | RB0/PWM1L — Digital I/O / PWM1 Low output |
| Pin 10 | RB1/PWM1H — Digital I/O / PWM1 High output |
| Pin 11 | RB2/PWM2L — Digital I/O / PWM2 Low output |
| Pin 12 | RB3/PWM2H — Digital I/O / PWM2 High output |
| Pin 13 | RB4/PWM3L — Digital I/O / PWM3 Low output |
| Pin 14 | RB5/PWM3H — Digital I/O / PWM3 High output |
| Pin 15 | RB6/PWM4L — Digital I/O / PWM4 Low output |
| Pin 16 | RB7/PWM4H — Digital I/O / PWM4 High output |
| Pin 17 | RC0 — Digital I/O |
| Pin 18 | RC1 — Digital I/O |
| Pin 19 | RC2 — Digital I/O |
| Pin 20 | VCAP — Core regulator filter output; 10 uF + 0.1 uF decoupling required |
| Pin 21 | VSS — Digital ground |
| Pin 22 | VDD — Digital supply (3.0-3.6 V) |
| Pin 23 | RC3 — Digital I/O |
| Pin 24 | RC4 — Digital I/O |
| Pin 25 | PGED1 — ICSP programming/debug data line |
| Pin 26 | PGEC1 — ICSP programming/debug clock line |
| Pin 27 | MCLR — Master clear / reset (active low) |
| Pin 28 | OSC1/RC13 — Crystal input / digital I/O |
Typical Applications
DSPIC33FJ16GS402-E/SO is suitable for 6 applications: Digital Switch-Mode Power Supply (SMPS) Control, Power Factor Correction (PFC) Stages, Uninterruptible Power Supply (UPS) and Inverters, Automotive 12 V/24 V Power Conversion, Digital Lighting Ballasts and LED Drivers, Industrial Motor-Drive Auxiliary Rails.
Digital Switch-Mode Power Supply (SMPS) Control
The DSPIC33FJ16GS402-E/SO is purpose-built for digital SMPS control loops. Its four high-speed PWM outputs with 7.5 ns edge resolution and the four 2.5 ns analog comparators allow direct peak-current-mode control of a multi-phase buck, boost, or full-bridge converter. The 40 MIPS core is more than adequate to run a 50 kHz PID loop with feedforward and state-space compensation, and the four 10-bit ADC modules sample current and voltage simultaneously via the integrated PWM-trigger/Sync matrix, achieving sub-microsecond loop latency. Typical position is the controller side of an isolated DC-DC brick converter for telecom and server power rails, replacing an analog UCC28C4x or UCCx8C4x controller.
Recommended
Power Factor Correction (PFC) Stages
For bridgeless totem-pole or interleaved CCM PFC stages switching at 100-300 kHz, the DSPIC33FJ16GS402's deterministic PWM-to-ADC trigger path enables tight line-cycle synchronization at near-unity power factor. Its 16-bit math plus DSP-style hardware MAC accelerates the multiplier-heavy control law and harmonic compensation tasks that AC-DC PFC requires. Industrial-grade PSU designers typically pair it with gate drivers such as the Si8271 or Si8261 for the high-side/low-side drive, and current-sense amplifiers in the analog input chain.
Recommended
Uninterruptible Power Supply (UPS) and Inverters
In line-interactive UPS and 48 V telecom rectifier systems, the DSPIC33FJ16GS402-E/SO can run the digital sine-PWM inverter loop and the closed-loop battery-charger control from a single device. Its extended -40C to +125C rating handles under-cabinet thermal stress, and the dual Sample-and-Hold ADC pair lets the firmware measure both battery current and DC-bus voltage simultaneously for seamless transfer-switch operation. For solar micro-inverters, the device's Flash-erase endurance also supports field firmware updates as grid-interconnect standards evolve.
Recommended
Automotive 12 V/24 V Power Conversion
With the -E (extended -40C to +125C) temperature suffix, this DSC is qualified for under-hood automotive modules including DC-DC converters for ADAS sensors, LED headlight drivers, and electric power-steering power supplies. Its AEC-Q100-grade operating envelope, deterministic PWM, and ICSP field-reprogrammability (for recall-management firmware updates) make it a standard Microchip solution for Tier-1 automotive power electronics. The 28-pin SOIC footprint simplifies both PCB layout and AEC-Q100 EMC compliance testing.
Recommended
Digital Lighting Ballasts and LED Drivers
The DSPIC33FJ16GS402-E/SO controls dimmable high-brightness LED drivers and digital fluorescent/LED ballasts by running PFC plus LLC or PFC plus flyback dual-loop control at 50-200 kHz switching. Its four analog comparators implement zero-current detection (ZCD) for quasi-resonant valley switching, increasing ballast efficiency by 5-10% versus fixed-frequency analog control. The PWM fault inputs also provide fast over-current shutdown for short-circuit protection on the LED string.
Recommended
Industrial Motor-Drive Auxiliary Rails
Inside variable-frequency drives (VFD) and servo amplifiers, the DSPIC33FJ16GS402-E/SO can serve as an auxiliary power-supply controller for the 24 V/15 V gate-drive rails feeding the main IGBT or SiC inverter stage. Its extended temperature rating tolerates the high-ambient cabinet environment, while the four high-speed comparators handle desaturation detection and over-current latch-off. Designers often use the device alongside the dsPIC33CK256MP505 main motor controller for a two-tier digital architecture.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS402-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS402-I/SO | DSPIC33FJ16GS402T-E/SO | DSPIC33FJ16GS502-I/SO | DSPIC33FJ16GS402-I/MM | DSPIC33FJ16GS402-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-pin SOIC (/SO) | 28-pin SOIC (/SO) - same | 28-pin SOIC (/SO) - same | 28-pin SOIC (/SO) - same | 28-pin QFN (/MM) - different footprint | 28-pin SPDIP (/SP) - through-hole, different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed (MIPS) | 40 MIPS | 40 MIPS | 40 MIPS | 50 MIPS (+25%) | 40 MIPS | 40 MIPS |
| Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 2 KB | 2 KB | 2 KB | 4 KB (+100%) | 2 KB | 2 KB |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| PWM Outputs | 4 channels, 7.5 ns resolution | 4 channels, 7.5 ns | 4 channels, 7.5 ns | 4 channels, 7.5 ns | 4 channels, 7.5 ns | 4 channels, 7.5 ns |
| Analog Comparators | 4 (2.5 ns response) | 4 (2.5 ns) | 4 (2.5 ns) | 4 (2.5 ns) | 4 (2.5 ns) | 4 (2.5 ns) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Extended -40C to +125C temperature grade for automotive use (vs DSPIC33FJ16GS402-I/SO)
- 50 MIPS performance upgrade with no PCB changes (vs DSPIC33FJ16GS502-I/SO)
- Integrated analog comparators eliminate external current-sense circuitry (vs DSPIC33CK256MP505 (newer dsPIC33CK family))
Design Notes
Place a 10 uF + 0.1 uF low-ESR ceramic capacitor on the VCAP pin (pin 20) within 3 mm of the package, with a wide, short trace to the pad. This capacitor stabilizes the internal 1.8 V core regulator; an undersized or distant capacitor causes PWM duty-cycle jitter and erratic ADC readings. Use separate analog and digital ground planes tied at a single point near the AVSS pin (pin 7) to prevent digital switching noise from coupling into the analog comparator inputs.
Estimated: the DSPIC33FJ16GS402-E/SO has 21 available digital I/O pins across three ports, but several pins share analog comparator, ICSP, and PWM alternate functions. When using PGED1/PGEC1 for ICSP debug (pins 25/26), reserve them even in production designs - Microchip recommends permanent debug-pin access for field firmware updates. Avoid remapping MCLR (pin 27) to a digital I/O unless an external reset supervisor is guaranteed, because in-system programming requires MCLR access.
Keep high-current switching traces (MOSFET drains and transformer secondaries) at least 10 mm away from the analog comparator input pins to prevent capacitive coupling that would inject switching noise into the peak-current-mode loop. Use a ground-return path directly under each analog input trace to minimize loop area. For multi-phase converters, route the PWM outputs in matched-length pairs so the propagation skew is below 2.5 ns to avoid duty-cycle mismatch and circulating currents.
Estimated: in a 28-pin SOIC package with theta_JA of approximately 70 C/W on a 4-layer 1-oz PCB, the DSPIC33FJ16GS402-E/SO can dissipate up to 1.4 W at 25C ambient before reaching its 125C maximum junction temperature. Typical SMPS controller firmware does not push core activity to 100% duty cycle, so power dissipation is generally 0.3-0.5 W. If the application runs heavy PID loops at full MIPS continuously, provide copper flooding on pins 7 (AVSS), 8 (AVDD), 21 (VSS), and 22 (VDD) to act as thermal relief.
Compliance Information
The -E temperature grade (extended -40C to +125C) is automotive-qualifiable per Microchip product page. RoHS/REACH compliance per Microchip material declaration. AEC-Q100 qualification details require the user's product-level qualification process.
