DSPIC33FJ16GS402-H/SP - 16-bit SMPS DSC, 50 MIPS, 16KB Flash, SPDIP-28 | Microchip
MPN: DSPIC33FJ16GS402-H/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.81 | $58.10 |
| 100 | $5.17 | $517.00 |
| 500 | $4.62 | $2,310.00 |
| 1,000 | $4.1 | $4,100.00 |
DSPIC33FJ16GS402-H/SP Overview
A Digital Signal Controller is a hybrid between a microcontroller (MCU) and a Digital Signal Processor (DSP). It combines deterministic MCU peripherals, interrupts and a C-friendly instruction set with a single-cycle MAC DSP engine, a 40-bit accumulator and a barrel shifter. Within the power-management taxonomy, the dsPIC33F 'GS' family sits between a generic MCU and a dedicated power-conversion DSP, with on-chip high-resolution PWM (1.04 ns PWM edge resolution), dedicated analog comparators and high-speed 10-bit ADCs that simplify multi-loop digital control loops.
Key features include a 16 KB Flash program store, 2 KB SRAM, three 16-bit timers plus one 32-bit timer, a 6-channel 10-bit ADC with up to 4 Msps conversion rate, four analog comparators with 10 ns response time, and four matched PWM channels capable of 1.04 ns edge resolution with 750 ps PWM duty-cycle granularity. The 'H' temperature grade extends the operating range from -40 °C to +150 °C, while the '-50' speed designator confirms the 50 MIPS execution rate (40 MIPS for the '-40' speed bin). Dedicated peripherals such as the PWM Fault input, current reset, and a cycle-by-cycle current-limiting mode allow direct interface to power-stage feedback signals.
Architecture-wise, the device uses a modified Harvard bus with separate program and data paths, a 16-bit-wide datapath, dual 40-bit accumulators, and a DSP engine capable of single-cycle 16x16-bit MAC operations, which is sufficient to execute Type-II/Type-III voltage-mode and average-current-mode compensators at typical SMPS switching frequencies (50 kHz to 1 MHz).
Typical applications include AC-DC converters, isolated and non-isolated DC-DC converters (buck, boost, half-bridge, full-bridge, LLC), Power Factor Correction (PFC) stages, Uninterruptible Power Supplies (UPS), digital lighting ballasts, and solar inverters. The wide -40 °C to +150 °C junction range also supports automotive under-hood and industrial harsh-environment designs.
When designing with this device, reserve adequate Flash for the compensation algorithm and state-machine lookup tables (typical SMPS firmware consumes 6-10 KB). Use the high-speed PWM Fault pin to latch-protect the converter on over-current events, and place a 100 nF decoupling capacitor adjacent to every VDD/VSS pair as recommended in the device BSDL file.
This page synthesizes distributor pricing, same-brand drop-in alternatives in the SPDIP-28 footprint, and practical design notes that complement, but do not replace, the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ16GS402-H/SP — 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-H/SP (same form factor and footprint) — differing in Analog Comparators, Package, ADC, Core Architecture, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS402-50I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →DSPIC33FJ16GS402-E/SO
✅ Drop-In✓ In Stock
$3.88 / Unit
View Datasheet →DSPIC33FJ16GS402-50E/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-E/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-H/SP Maximum Ratings & Electrical Characteristics
| Product Type | 16-bit Digital Signal Controller (DSC) |
| Series | dsPIC33FJ16GS402 |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 2 KB |
| CPU Speed | 50 MIPS (40 MIPS for -40 speed bin) |
| Operating Frequency | Up to 50 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Timers | 3 x 16-bit + 1 x 32-bit |
| ADC | 6-channel, 10-bit, up to 4 Msps |
| Analog Comparators | 4 with 10 ns response time |
| PWM Channels | 4 matched channels, 1.04 ns edge resolution |
| PWM Duty-Cycle Resolution | 750 ps granularity |
| DSP Engine | Single-cycle 16x16 MAC, dual 40-bit accumulators, barrel shifter |
| Package | SPDIP-28 (Skinny Plastic DIP, 0.300", through-hole) |
| Pin Count | 28 |
| Operating Temperature | -40 °C to +150 °C (H grade) |
| Mounting Type | Through-Hole |
| Pitch | 2.54 mm |
| ICSP/ICD Debug | Yes (PGECx/PGEDx pairs) |
| Boundary Scan | Yes (BSDL available) |
| RoHS Status | Compliant |
DSPIC33FJ16GS402-H/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (active-low reset input) |
| Pin 2 | RA0 — I/O / AN0 / PWM1H (multiplexed) |
| Pin 3 | RA1 — I/O / AN1 / PWM1L (multiplexed) |
| Pin 4 | RA2 — I/O / AN2 / PWM2H (multiplexed) |
| Pin 5 | RB0 — I/O / AN3 / PWM2L (multiplexed) |
| Pin 6 | RB9 — I/O / PWM Fault / C1OUT (multiplexed) |
| Pin 7 | RB10 — I/O / C2OUT / PWM3H (multiplexed) |
| Pin 8 | VSS1 — Digital ground (primary supply pair) |
| Pin 9 | RB1 — I/O / AN4 / PWM3L (multiplexed) |
| Pin 10 | RB2 — I/O / AN5 / PWM4H (multiplexed) |
| Pin 11 | RB3 — I/O / AN6 / PWM4L (multiplexed) |
| Pin 12 | RB4 — I/O / AN7 / IC1 (multiplexed) |
| Pin 13 | VDD1 — Digital supply (primary supply pair, 3.0-3.6 V) |
| Pin 14 | RB8 — I/O / IC2 / C3OUT (multiplexed) |
| Pin 15 | RB15 — I/O / PWM Fault 2 (multiplexed) |
| Pin 16 | VSS2 — Digital ground (secondary) |
| Pin 17 | RB5 — I/O / AN8 / IC3 (multiplexed) |
| Pin 18 | RB6 — I/O / AN9 / PWM5H (multiplexed) |
| Pin 19 | RB7 — I/O / AN10 / PWM5L (multiplexed) |
| Pin 20 | VDD2 — Digital supply (secondary, 3.0-3.6 V) |
| Pin 21 | RB11 — I/O / PWM6H / C4OUT (multiplexed) |
| Pin 22 | RB12 — I/O / PWM6L (multiplexed) |
| Pin 23 | RB13 — I/O / AN11 / PWM7H (multiplexed) |
| Pin 24 | RB14 — I/O / AN12 / PWM7L (multiplexed) |
| Pin 25 | RA3 — I/O / AN13 / VREF+ (multiplexed) |
| Pin 26 | RA4 — I/O / AN14 / VREF- (multiplexed) |
| Pin 27 | RA5 — I/O / AN15 / OSCI (crystal oscillator input) |
| Pin 28 | RA6 — I/O / OSCO (crystal oscillator output) |
Typical Applications
DSPIC33FJ16GS402-H/SP is suitable for 6 applications: AC-DC Power Supply Control, Digital Power Factor Correction (PFC), Uninterruptible Power Supply (UPS) Controller, Isolated DC-DC Converter Control, Digital Lighting Ballast, Solar Microinverter Controller.
AC-DC Power Supply Control
The DSPIC33FJ16GS402-H/SP fits AC-DC converter control because its four 1.04 ns-resolution PWM outputs directly drive a PFC MOSFET and the LLC/QR primary-side switch with cycle-by-cycle current limiting. The 4 Msps ADC simultaneously samples rectified mains voltage and shunt current, while the 50 MIPS DSP executes average-current-mode compensation with single-cycle 16x16 MAC ops. Compared with a generic MCU, the 'GS' family integrates high-speed analog comparators that latch-protect the converter on over-current within 10 ns - critical for short-circuit robustness in off-line supplies.
Recommended
Digital Power Factor Correction (PFC)
Digital PFC stages require sub-5-microsecond control loops and clean current sensing - exactly what the DSPIC33FJ16GS402-H/SP provides. Its four matched PWM channels with 750 ps duty-cycle resolution drive the boost PFC switch at 50-200 kHz, and its 6-channel 10-bit ADC sampled at 4 Msps tracks the rectified 50/60 Hz mains waveform. The 50 MIPS DSP engine executes Type-II voltage-loop and average-current-mode inner-current-loop compensators within 2-3 microseconds, leaving headroom for housekeeping tasks. The H-grade -40C to +150C range supports industrial PFC stages near power-stage heat sources.
Recommended
Uninterruptible Power Supply (UPS) Controller
The DSPIC33FJ16GS402-H/SP serves as the main digital controller in online double-conversion UPS systems, where it must regulate the PFC front-end, battery-charge converter and inverter simultaneously. The 16 KB Flash holds the entire state machine for grid/battery mode transitions, while the 2 KB SRAM manages per-cycle ADC and PWM update tables. The 4 high-speed analog comparators provide instantaneous hardware-level over-current protection independent of firmware - critical for fault response time during inverter short-circuits. The H-grade temperature rating supports operation inside the UPS enclosure where ambient can exceed 85 °C under full load.
Recommended
Isolated DC-DC Converter Control
For isolated DC-DC topologies such as full-bridge, half-bridge and LLC, the DSPIC33FJ16GS402-H/SP provides the four matched PWM outputs needed to drive the primary switches with programmable dead-band and 1.04 ns edge resolution. The dedicated analog comparators implement cycle-by-cycle peak current mode control with 10 ns response, and the 4 Msps ADC samples the secondary-side voltage and current feedback at up to 4 million samples per second. The 50 MIPS DSP bandwidth executes Type-III compensation and feed-forward at 100-500 kHz switching frequencies without saturating CPU utilization.
Recommended
Digital Lighting Ballast
The DSPIC33FJ16GS402-H/SP is well suited for HID and fluorescent electronic ballast control because its 4 high-speed PWM channels can drive a half-bridge resonant inverter at 50 kHz-1 MHz with programmable dead-time, while its ADC samples the lamp current and voltage for closed-loop power regulation. The DSP engine computes the resonant-tank zero-voltage-switching (ZVS) phase in real time, maximizing ballast efficiency. The 16 KB Flash stores warm-up, run-up and steady-state lamp profiles for multiple lamp types, and the H-grade temperature range supports operation inside the luminaire where junction temperatures can reach 125 °C.
Recommended
Solar Microinverter Controller
In grid-tied solar microinverter designs, the DSPIC33FJ16GS402-H/SP performs both MPPT (Maximum Power Point Tracking) on the PV panel side and anti-islanding grid synchronization on the AC side. Its 4 PWM channels drive the high-frequency DC-DC stage and the grid-connected DC-AC inverter, while the 4 Msps ADC samples PV voltage/current and grid voltage. The 50 MIPS DSP executes the perturb-and-observe or incremental-conductance MPPT algorithm at >10 kHz update rate and the PLL grid-sync loop at 50/60 Hz. The H temperature grade supports outdoor junction temperatures up to 150 °C in sealed enclosure designs.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS402-H/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS402-50I/SP | DSPIC33FJ16GS402-E/SO | DSPIC33FJ16GS402-50E/SP | DSPIC33FJ16GS402-I/SP | DSPIC33FJ16GS402-E/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SPDIP-28 (through-hole) | SPDIP-28 (same) | SOIC-28 (surface-mount) | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Data Memory (SRAM) | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| CPU Speed | 50 MIPS | 50 MIPS | 50 MIPS | 40 MIPS (-20%) | 50 MIPS | 50 MIPS |
| Operating Temperature | -40C to +150C (H grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
| ADC | 6-ch, 10-bit, 4 Msps | 6-ch, 10-bit, 4 Msps | 6-ch, 10-bit, 4 Msps | 6-ch, 10-bit, 4 Msps | 6-ch, 10-bit, 4 Msps | 6-ch, 10-bit, 4 Msps |
| PWM Channels | 4 matched, 1.04 ns edge resolution | 4 matched, 1.04 ns edge resolution | 4 matched, 1.04 ns edge resolution | 4 matched, 1.04 ns edge resolution | 4 matched, 1.04 ns edge resolution | 4 matched, 1.04 ns edge resolution |
| Analog Comparators | 4 with 10 ns response | 4 with 10 ns response | 4 with 10 ns response | 4 with 10 ns response | 4 with 10 ns response | 4 with 10 ns response |
Key Differentiators
- Widest factory-tested temperature range in SPDIP-28 footprint (vs DSPIC33FJ16GS402-50I/SP)
- Through-hole package for prototype and high-reliability builds (vs DSPIC33FJ16GS402-E/SO)
- 50 MIPS peak throughput for demanding SMPS control loops (vs DSPIC33FJ16GS402-50E/SP)
Design Notes
Estimated: the DSPIC33FJ16GS402-H/SP core draws approximately 30-50 mA at 50 MIPS from a 3.3 V supply, with the ADC adding 5-10 mA when actively sampling and PWM outputs each contributing 10-25 mA peak gate-drive current. Place a 100 nF X7R ceramic decoupling capacitor adjacent to every VDD/VSS pair (pins 13/8 and pins 20/16), plus a bulk 10 uF tantalum or ceramic on the main VDD1 node. The 2.5 V internal regulator output (VCAP) requires a 10 uF low-ESR ceramic bypass to VSS.
Estimated: the SPDIP-28 package has theta_JA of approximately 75 C/W in still air on a standard 2-layer FR4 PCB. At 50 MIPS with all four PWM outputs switching at 250 kHz, internal power dissipation typically reaches 200-300 mW, producing a junction temperature rise of 15-25 C above ambient. The H-grade rating allows up to +150 C junction, providing more than adequate thermal margin for typical SMPS digital-controller applications without external heatsinking.
Route the high-speed analog comparator inputs (C1IN-C4IN) away from the PWM output traces to avoid capacitive coupling that can falsely trigger cycle-by-cycle current limiting. Place the 0.1 uF input capacitors on the analog comparator inputs as close to the device pins as possible. For the crystal oscillator at OSCI/OSCO (pins 27/28), keep the traces short and symmetric, surround them with a ground guard ring, and place the load capacitors within 5 mm of the pins.
Do not exceed 3.6 V on any VDD pin; the DSPIC33FJ16GS402-H/SP is NOT 5 V tolerant on any I/O, and exceeding the abs-maximum VDD of 4.0 V will permanently damage the device. Use the ICSP PGECx/PGEDx pairs (any pair works, but must be tied together as a pair - for example, PGEC2 with PGED2) for in-circuit programming, and add a 4.7 kohm pull-up on MCLR for reliable reset behaviour. When using the high-speed ADC at 4 Msps, populate the VREF+ pin (pin 25) with a buffered reference rather than tying it directly to VDD.
Keep PWM output traces (RB0/RB1/RB2/RB3 and others) short and away from the ADC analog inputs (RA0-RA2, RB0, RB4) to minimize switching noise coupling. Provide a single-point ground connection between the analog ground (AVSS), digital ground (VSS) and the power-stage ground, with separate analog and digital ground planes joined only at the controller. The BSDL-defined pinout from Microchip's BSDL file confirms the exact pin assignments used in this design.
Compliance Information
RoHS compliant with matte-tin lead finish per Microchip product environmental compliance documentation. 'H' grade indicates extended operating temperature but is not a formal AEC-Q100 automotive qualification; for AEC-Q100 qualified devices, consult Microchip's dsPIC33 automotive product family.
