NSING has officially released the AI Data Center Digital Power Reference Design-the high-performance single-chip 3 kW digital power solution NS3KW53V5P2L3. 

This solution delivers exceptional integration and efficiency, enabling customers to rapidly build efficient, intelligent, and reliable power systems. It helps developers quickly address critical power challenges in AI computing and new energy sectors, providing core support for the digitalization and intelligentization of power electronics technology.

1. High-Performance Single-Chip 3KW Digital Power Reference Solution - NS3KW53V5P2L3

NS3KW53V5P2L3 is a reference design launched by NSING for the digital power industry, and is particularly well-suited for AI data center power supplies, outdoor integrated power supplies, and other digital power applications. The design uses a single N32H474 chip as the digital core controller and is built on our self-developed HunterWave OS RTOS ecosystem. It achieves a peak system efficiency of at least 97.7%, reaching industry-leading levels.

The solution employs a front-stage, two-phase interleaved bridgeless totem-pole PFC and a rear-stage three-phase interleaved Y-Y LLC architecture. This design enables flexible use of various power devices and, with the support of newer devices such as SiC and GaN, allows deep optimization of the cost-performance ratio. A block diagram of the solution architecture is shown below:

Image2：3 kW Digital Power Solution Block Diagram

The core architecture of NS3KW53V5P2L3 uses a SiC-based two-phase interleaved totem-pole PFC front-end and a SiC-based, three-phase interleaved LLC DC/DC isolated back-end. The entire front- and rear-stages system is controlled by a single N32H474 chip, which handles the control algorithms, protection logic, and communication with the host computer for both power conversion stages, delivering outstanding comprehensive performance.

NS3KW53V5P2L3: Key Performance Highlights

• Exceptionally High Conversion Efficiency: Peak system efficiency ≥97.7%, PF >0.99 at 50%~100% load.

• Excellent Electrical Performance: Utilizes CCM two-phase interleaved totem-pole PFC to reduce input current ripple and THD (<5.0% @100% load); three-phase interleaved half-bridge LLC achieves high efficiency, low output ripple, and fast dynamic load response.

• Comprehensive Protection Features: Includes over-temperature, output over-current/over-voltage, and input under/over-voltage protections. The interleaved design reduces the requirement for output bus capacitors, enhancing system lifespan.

• Convenient Development Ecosystem: Based on the self-developed HunterWave OS ecosystem, integrated with a host computer visualization tool enabling online parameter configuration, waveform analysis, and one-stop protection strategy management, significantly enhancing system intelligence and debugging efficiency.


                                                                          Power Efficiency under Different Loads

2. High-Precision Digital Power Dedicated Main Control Chip - N32H474

The N32H474 is NSING’s main control chip for digital power applications, built on the ARM Cortex-M4F core and capable of running up to 240MHz with support for a floating-point unit and DSP instructions to boostdata processing speed and enable complex computing tasks. Its SHRTIMER with 125ps resolution and four independent 12-bit 4.7 MSPS ADCs, meeting the needs of various complex topologies and enabling flexible PWM configuration.

Key Resources for N32H474 Digital Power Applications:

• High Performance for Real-Time Control

--240 MHz Arm Cortex-M4F, performance up to 300 DMIPS.

--Built-in hardware math accelerator (Cordic), supporting integer and floating-point operations.

• Highly Integrated Analog Peripherals Simplify Hardware Design

--4x 12-bit 4.7Msps ADCs, supporting up to 51 channels.

--8x 12-bit DACs.

--7x Comparators (CMP), any comparator output can be internally connected to any Fault or EEV input.

• High-Precision Timers Ensure Digital Power Performance:

--1x 16-bit SHRTIMER, 12x PWM outputs (125ps resolution), phase adjustable, 10 external input events, Flexible I/O mapping possible.

--3x 16-bit Advanced Timers (ATIM), each supporting 6 independent channels, 4 of which support 4 complementary PWM output pairs.

• Rich and Flexibly Configurable Peripheral Interfaces Support Multi-Node Synchronous Control:

--8x U(S)ARTs, 3 of which support Flexible I/O mapping, hardware-level 485 enable drive.

--3x CAN-FD interfaces, supporting Flexible I/O mapping.



                                                                   N32H474 Series MCU Key Resources

3. Convenient Digital Power Development Ecosystem

NSING provides a comprehensive, full-stack development ecosystem that spans from self-developed main control MCU chips, power hardware, control algorithms, a real-time operating system, and supporting tools. It pioneers in the industry by establishing a highly abstracted standardized development framework, which includes a digital control software framework and host computer debugging tools. This innovative development ecosystem can significantly improve digital power development efficiency, helping users quickly respond to diverse market demands in AI and new energy.

The control software for the NS3KW53V5P2L3 design is developed based on the self-developed HunterWave OS framework. HunterWave OS is a hard real-time control operating system based on time-slice polling non-preemptive scheduling. Scheduled based on hardware interrupts, it offers high reliability and is specifically designed for real-time control.

3.1 Digital Control Software Architecture

The digital control software architecture consists of a 4-layer structure: Driver Layer (BSW), Runtime Environment (RTE) Layer, Application Algorithm Layer (APP), and Host Computer Toolchain Layer (Debug Tool).
                                                    Four-layer architecture meeting various standard certifications

3.2 Toolchain

The professional development toolchain provided by NSING includes the configurable graphical debugging tool HunterWave OS Debug Tool, the visual waveform debugging tool HunterWave OS Graphic, and a series of other tools.

These tools offer the following benefits:

• Innovative abstraction of the digital control framework, greatly simplifying software coding difficulty by providing a higher-lever, standardized structure.

• Graphical parameter debugging interface for real-time control software, breaks through traditional debugging methods that rely on programmers, enabling more intuitive and faster tuning. 

• Standard waveform display tool for PID parameter tuning. For the first time, offers a full-range visual waveform comparison to accelerate PID debugging and save time and resources for enterprises.

4. Selection and Support

NSING’s N32H474 series MCU offers a range of enhanced industrial-grade models, all produced at mass scale with recognized quality and supply capacity across the industry. Customers can request samples by contacting NSING's local sales teams to request samples, or contact sales customer service and authorized distributors via the official website (https://nsing.com.sg/support/agent/).

Image10-N32H474 Series Selection Guide