company blog about Recycle Infineon DC-DC Converters:Digital Power Controller,POL Voltage Regulator,IBC Module

Recycle Infineon DC-DC Converters:Digital Power Controller,POL Voltage Regulator,IBC Module

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A Simple Recycling Process

1. Enquiry and Quotation: Customers provide the specific model, quantity, condition and stock status of the chips for a free online enquiry; we provide an accurate quotation in real time;

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I. XDP™ Series Digital Power Controllers: The Intelligent Hub of the Complete DC-DC System

Digital power controllers form the control core of IBC and POL power modules. Based on the full range of XDPP11xx XDP digital power chips from Infineon, these controllers feature an embedded processing core that replaces traditional analogue loops. They support multi-topology compatibility, millisecond-level transient response, digital telemetry and customisable firmware tuning, and are suitable for all scenarios involving isolated and non-isolated DC-DC conversion.

Core Hardware Architecture and Key Parameters

1. Main Control Core: Features a built-in 100 MHz 32-bit Arm Cortex-M0 processor, integrated with a high-precision analogue front-end (AFE) and a hardware PID compensation loop. By eliminating software cycle delays, it achieves transient response speeds that significantly outperform traditional analogue solutions;

2. High-Precision Modulation Capabilities: Up to 12 DPWM outputs, with a PWM resolution of up to 78.125 ps, a minimum dead time of 1.25 ns, and a switching frequency of up to 2 MHz; supports switching between PWM and PFM burst modes, significantly improving energy efficiency under light load conditions;

3. Communication and Control: Comes standard with PMBus 1.4, I²C, SPI and UART multi-bus interfaces, enabling remote reading of voltage, current, temperature and power consumption data, as well as online modification of output parameters and threshold protection points, meeting the requirements for intelligent operation and maintenance of data centre power supplies;

4. Package Options: Available in the mainstream VQFN-24 (4×4 mm) compact package, minimising space requirements on compact power supply boards.

Supported Topologies

1) Isolated DC-DC (suitable for IBC high-voltage bus conversion)

Full-bridge, half-bridge LLC resonant, phase-shifted full-bridge PSFB, interleaved half-bridge, and 400V/800V high-voltage input architectures, supporting step-down conversion scenarios for ±400V and 800V high-voltage rack power distribution;

2) Non-isolated DC-DC (suitable for POL buck conversion and 48V to 12V bus conversion)

Synchronous buck, buck-boost, flyback, three-stage capacitor flyback topologies, and Infineon’s proprietary ZSC/HSC hybrid switched capacitor architecture, which form the core control solutions for 48V data centre power supply.

Typical Models and Application Scenarios

- XDPP1140: General-purpose standard version, suitable for 48V-to-12V IBC applications up to 600W, telecoms BBU (baseband units) and small cell power supplies;

- XDPP1148: High-power enhanced version, supporting GaN IBC modules above 1.6kW and AI accelerator card bus power supplies, featuring current sharing and phase shifting functions;

- XDPP1188: High-voltage dedicated model, designed for 800V DC data centre HV-IBC solutions, enabling wide-range conversion from 800V to 48V/24V/12V.

II. POL (Point of Load) Regulator: Precision Power Supply at the Final Chip-Level Stage

The POL (Point of Load) regulator is situated at the very end of the power supply chain. It receives the 12V intermediate bus voltage from the IBC output and directly steps it down to the ultra-low core voltages of 0.8–3.3V required by AI processors, FPGAs, DDR memory, network cards and controller chips. Featuring extremely high load currents, ultra-fast dynamic response and multiple independent outputs, it ensures the stable operation of computing chips.

Product Categories and Key Features

1. Integrated POL Power Modules (monolithic package, plug-and-play)

Infineon’s monolithic POL modules integrate MOSFETs, inductors, control loops and protection circuits, with current ratings ranging from 3 A to 40 A. They are available in analogue versions and versions with digital PMBus telemetry:

- Input: Standard 12 V intermediate bus voltage;

- Output: Programmable from 0.6V to 5V;

- Key advantages: Peak conversion efficiency of over 95 per cent; load step response time of <1 μs, suitable for handling instantaneous peak power consumption fluctuations in AI chips;

- Built-in protection: Over-voltage (OVP), under-voltage (UVP), over-current (OCP), over-temperature (OTP) and short-circuit lockout protection.

2. Multi-phase Discrete POL Solution (Preferred for High-Power AI Chips)

Utilises the XDP digital controller and OptiMOS™ power MOSFETs to build a 2–8-phase interleaved buck architecture:

- Maximum current per phase exceeds 200A, suitable for high-power chips such as GPUs and AI large-model accelerators;

- Digital current sharing technology balances load losses across phases to reduce heat generation; automatic phase disengagement under light loads optimises standby power consumption;

- PMBus collects real-time data on power consumption and temperature for each channel, allowing server backends to monitor the health status of the chip power supply.

Typical Application Scenarios

Power supply for CPU/GPU cores on AI server motherboards; routing and switching chips in switches; industrial control boards; edge AI computing boxes; and backplane power supplies for storage hard drives.

III. IBC Intermediate Bus Converter: The 48V/800V Power Bridge for Data Centres

The IBC (Intermediate Bus Converter) is situated in the middle section of the power supply chain. It receives high-voltage DC inputs of 48V/±400V/800V from the rack, uniformly converts them to a standard 12V intermediate bus voltage, and supplies this to multiple POL voltage regulators. It serves as the core hub of the 48V power supply architecture in modern high-density AI data centres.

Two Main Product Lines

1. Medium-Voltage MV-IBC (48V input architecture, currently the mainstream option)

Input voltage: 44–60V DC; Output: 12V; Power range: 600W–1600W, with future scalability up to 3kW

Benchmark Solution Parameters

1) 600W DR-HSC Reference Design (REF_600W_DRHSC_XDP)

- Topology: ZVS (Zero Voltage Switching) capacitive front-end + two-phase, three-stage flyback capacitor two-stage architecture;

- Peak efficiency: 98.1 per cent, with a smooth efficiency curve across the full load range;

- Output current: 50A; equipped with the XDPP1140 digital controller and XDP710 hot-swap controller, supporting surge suppression and soft start to prevent power-on surges from damaging downstream components.

2) 1600W CoolGaN™ Gallium Nitride IBC Module (REF_IBC_1600W_GAN)

- Components: Features 100V CoolGaN G3 gallium nitride switching transistors and an XDPP1148 main control chip;

- Form factor: Ultra-slim 10 mm low-profile package, suitable for the confined on-board space of AI accelerator cards;

- Performance: Peak efficiency of 96.7% at 48 V input; supports forced air cooling; features multi-channel current sharing capability; scalable power output via stacking;

- Digital features: PMBus remote voltage regulation, fault reporting and power consumption statistics.

2. High-Voltage HV-IBC (800V DC Next-Generation Data Centre Architecture)

Designed for the next-generation high-voltage power distribution systems of hyperscale cloud service providers, this system features two-stage conversion:

- Stage 1: 800V DC → 48V intermediate bus;

- Stage 2: 48V → 12V traditional IBC;

Utilising 650V CoolGaN devices combined with the XDPP1188 high-voltage digital controller, this solution significantly reduces rack busbar cable losses and more than doubles the total power carrying capacity of the rack, making it suitable for AI cluster deployments at the ten-thousand-card level.

Core Benefits of the IBC Module

1. Reduced losses and improved energy efficiency: Centralised high-voltage transmission minimises cable voltage drops, improving overall data centre power supply efficiency by 3%–5% and significantly reducing the TCO of IDC electricity costs;

2. Ultra-high power density: The hybrid switched-capacitor topology reduces the footprint by 40% compared to traditional LLC, meeting the high-density stacking requirements of AI servers;

3. Strong Adaptability to Peak Loads: Capable of handling instantaneous peak loads twice the average power, perfectly matching the fluctuating power consumption of AI computing bursts;

4. Safety and Redundancy: Integrated hot-swap capability, electronic fuses (e-Fuses) and overcurrent/overvoltage lockout, supporting hot-swap of boards without server downtime.

IV. Summary of Application Areas

1. AI supercomputing & hyperscale data centres: GPU clusters, large-model training servers, and power supply systems for AI accelerator cards;

2. Telecommunications: 5G base station BBUs/RRUs, core network equipment, and telecoms UPS power supplies;

3. Industrial Computing: Industrial PCs, machine vision edge terminals, and automation servo control power supplies;

4. High-end In-Vehicle Computing Domain Controllers: In-vehicle ADAS domain controllers and high-voltage DC-DC conversion applications.