company blog about Infineon TDA22560 OptiMOS™ 90A Integrated Power Stage With Thermal Performance

Shenzhen Mingjiada Electronics Co., Ltd. supplies the Infineon TDA22560 OptiMOS™ 90 A integrated power stage, which offers first-class efficiency and thermal performance.

The Infineon TDA22560 is a high-performance 90 A integrated power stage belonging to the POWERSTAGE CE series, featuring proven OptiMOS™ power MOS technology. It integrates high- and low-voltage MOSFETs with intelligent gate driver circuits, eliminating the complex design associated with traditional discrete component solutions. With its outstanding electrical performance and innovative thermal architecture, it has become the preferred component for multi-phase VRM power supply systems, perfectly meeting the high-current, low-voltage power supply requirements of core chips such as CPUs, GPUs and ASICs, whilst balancing high power density with long-term operational reliability.

I. Core Positioning and Integration Advantages of the TDA22560

The TDA22560 is a monolithic power stage specifically designed for high-frequency, multi-phase buck conversion topologies. With a continuous output current rating of up to 90A, it integrates seamlessly with Infineon’s XDPE series of digital main controllers to build highly efficient and stable multi-phase DC-DC power supply systems. Compared to traditional discrete MOSFET-plus-driver solutions, this device features a highly integrated design, combining the switching transistor, driver circuitry, sensing circuitry and protection unit within a single package. This significantly reduces the number of external components, effectively lowering BOM costs and PCB footprint, whilst avoiding issues such as routing interference and parameter deviations associated with discrete solutions, thereby significantly enhancing the consistency and stability of the power supply system.

Leveraging Infineon’s proprietary OptiMOS™ semiconductor process, the device delivers the dual benefits of low conduction losses and low switching losses. It maintains excellent conversion efficiency even under high-frequency switching conditions of 2 MHz, aligning with the trend towards higher frequencies and smaller sizes in modern high-end power supplies, whilst meeting the stringent requirements for low power consumption and high durability in data centres and industrial computing platforms.

II. Key Electrical Performance Parameters of the TDA22560

Thanks to precise parameter tuning, the TDA22560 is suitable for the vast majority of high-end, high-current power supply scenarios. Its core electrical parameters offer exceptional adaptability to various scenarios and performance redundancy. The specific core specifications are as follows:

- Rated output current: 90A continuous, capable of withstanding short-term peak current surges, meeting the demands of sudden load changes in processors

- Input voltage range: 4.25V–16V, covering mainstream bus voltages for servers, industrial equipment and telecommunications equipment

- Output voltage range: 225mV–5.5V, precisely tailored to the low-voltage, high-current power supply requirements of CPUs and GPUs

- Maximum switching frequency: 2MHz, supporting high-frequency operation to reduce the size of associated inductors and capacitors and enhance system power density

- Operating temperature range: -40°C to +125°C, with a wide temperature range suitable for various demanding industrial and computing scenarios

- Process characteristics: Based on OptiMOS™ trench technology, achieving extremely low on-resistance and gate charge, significantly reducing switching and conduction losses

III. Core Thermal Performance and Thermal Architecture Design of the TDA22560

The primary challenge for high-current power devices is heat accumulation under heavy load conditions, which can easily lead to device derating, performance degradation or even thermal damage. The TDA22560 addresses this through a three-pronged approach combining process optimisation, innovative packaging thermal design and multi-dimensional thermal pathways, achieving industry-leading thermal management capabilities that perfectly meet the thermal requirements of continuous 90A operation.

Process-Level Thermal Loss Optimisation

The device utilises Infineon’s next-generation OptiMOS™ power chip process. By optimising the chip’s trench structure and doping process, it significantly reduces the MOSFET’s on-resistance and switching losses, thereby minimising the generation of Joule heat and switching heat during operation at the source. Compared to traditional power MOS solutions, under identical 90A high-current operating conditions, the TDA22560 reduces its own thermal losses by over 15%, effectively minimising heat accumulation and fundamentally alleviating thermal stress, thereby laying the foundation for continuous operation in high-temperature environments. Furthermore, this process offers excellent temperature stability, with minimal parameter drift as junction temperature rises, preventing the vicious cycle of loss escalation caused by temperature increases.

Innovative Dual-Path Thermal Design

The TDA22560 utilises a customised, high-efficiency thermal package from Infineon, breaking free from the limitations of traditional unidirectional heat dissipation. It supports a dual-path thermal conduction mode—combining top-side heat dissipation with bottom-side PCB heat dissipation—to create a comprehensive thermal pathway. The bottom of the device features a large exposed thermal pad, which can be directly bonded to high-copper-foil areas and thermal vias on the PCB, rapidly conducting heat from the chip core to the PCB substrate and utilising the large copper foil area for passive cooling; The top of the package utilises a highly thermally conductive moulding compound with a thermal conductivity far exceeding that of conventional power device packages, allowing direct integration with external cooling components such as surface-mount heat sinks and heat spreaders to achieve active, enhanced cooling.

This dual-path thermal design completely resolves the challenge of inadequate heat dissipation in compact PCB layouts, significantly reducing the thermal resistance from the core junction to the ambient environment and from the junction to the package. This ensures that continuous output of the 90A rated current becomes a stable norm, avoiding performance limitations caused by single-sided thermal bottlenecks.

Thermal Resistance Parameters and High-Temperature Performance

Thanks to its superior thermal architecture and process optimisation, the TDA22560 boasts excellent thermal resistance parameters, with both junction-to-case and junction-to-ambient thermal resistances ranking among the top tier of 90A power-class devices. Under standard PCB layout and conventional air-cooling conditions, when the device operates continuously at full load (90A), the junction temperature can be stably maintained within a safe range without significant heat accumulation; even under severe conditions such as high-temperature enclosed environments or low airflow, it can still maintain rated output performance without significant efficiency degradation due to overheating. Furthermore, the device incorporates a precise temperature sensing unit that continuously monitors the chip’s junction temperature, providing accurate data to support system thermal management strategies and load current limiting adjustments.

4. The TDA22560’s comprehensive protection mechanisms, suitable for high-temperature, high-current operating conditions

To address safety risks associated with high-current, high-temperature and high-frequency operating scenarios, the TDA22560 integrates a full suite of intelligent protection functions, which complement its excellent thermal performance to ensure the long-term stable operation of the system. Core protection functions include over-temperature protection, over-current protection, input under-voltage lockout and short-circuit protection. When the junction temperature exceeds the threshold due to extreme loads or abnormal heat dissipation, the over-temperature protection mechanism responds rapidly to automatically limit power output, thereby preventing thermal breakdown and damage to the device. Over-current and short-circuit protection instantly cut off abnormal currents, preventing high-current surges from burning out the chip and downstream loads. The synergy between these multiple protection mechanisms and the efficient thermal management system ensures the device maintains exceptional reliability under high-load, high-temperature, and transient operating conditions.

V. Typical Application Scenarios for the TDA22560

With its 90A high-current output capability, 2MHz high-frequency performance, exceptional thermal management, and high integration, the TDA22560 is widely used in various high-end, high-current DC-DC power supply applications. Key application areas include:

- Data centres and AI servers: Providing multi-phase, high-current regulated power to CPUs, GPUs, and AI accelerator cards, meeting the demands of continuous operation under heavy loads

- High-performance computing equipment: Core power supply modules for HPC computing hosts and industrial servers, ensuring stable power output under computational loads

- Industrial computing and embedded platforms: Power supply for industrial control motherboards and embedded computing devices in harsh industrial environments, meeting wide temperature range and high stability requirements

- Network and communications equipment: High-current power supply systems for high-end switches, routers and other communications equipment, meeting high-frequency and long-duration operational requirements

VI. Summary of the TDA22560’s Comprehensive Advantages

The Infineon TDA22560 OptiMOS™ 90A integrated power stage leverages the OptiMOS™ core process as its performance foundation and features a bidirectional, highly efficient thermal architecture as its key advantage, achieving comprehensive breakthroughs in high current, high efficiency, robust thermal management, high integration and high reliability. Compared to discrete solutions of the same class and standard integrated power stages, it not only simplifies power supply system design and reduces overall system cost and footprint, but also addresses the industry-wide challenge of poor high-temperature stability in high-current power devices through extreme thermal optimisation. Capable of sustained, stable operation under demanding conditions involving high frequencies, heavy loads and wide temperature ranges, it is the preferred core component for high-end multi-phase VRM power supply systems, providing reliable technical support for power supply upgrades in high-end equipment across computing, industrial and communications sectors.