It is necessary to optimize the performance, efficiency, and reliability of high-voltage power supplies in home appliances and AC-DC converters, as well as reduce the number and cost of bills of materials (BOMs) and design work.

Infineon Technologies AG announced today the launch of its 5th generation fixed-frequency (FF) CoolSET portfolio, demonstrating its commitment to providing devices that meet market demands.

The new 800 V and 950 V AC-DC integrated power stages (IPS) are available in the DIP-7 package and are suitable for applications such as auxiliary power supplies for home appliances, AC-DC converters, battery chargers, solar energy systems, and motor control and drives.

The fixed-frequency CoolSET solution integrates a PWM controller IC and the latest high-voltage CoolMOS™ P7 super-junction (SJ) MOSFETs in a single package. The 5th generation fixed frequency CoolSET™ portfolio offers the industry’s first devices that enable a wider input voltage range by incorporating avalanche-tolerant SJ MOSFETs with 950 V breakdown voltage.

The new device supports both isolated and non-isolated topologies, such as flyback or buck, and operates at switching frequencies of 100 kHz and 65 kHz. Capable of both buck and flyback topologies in a single device, it simplifies the supply chain for customers. The integrated error amplifier supports direct feedback from the primary output, a feature commonly used in non-isolated topologies, minimizing component count and reducing design complexity.

The frequency reduction mode with soft gate drive and frequency jitter operation reduces EMI and improves efficiency during medium and light load conditions. These products also support continuous (CCM) conduction mode and discontinuous conduction mode (DCM). Under low AC line input conditions, CCM operation reduces conduction losses and thus improves efficiency, helping to meet energy efficiency standards.

The MOSFETs employed in these devices support the extremely wide input voltage range required for single-phase smart metering and industrial applications. In addition, these devices can further improve converter efficiency and reduce standby power consumption by optimizing the snubber circuit.

The new devices feature a high level of functional integration, include comprehensive protection features and an auto-restart function that allows the power system to restart automatically in the event of a fault. These protection features, combined with the high breakdown voltage of the SJ MOSFETs, enhance the robustness of the power supply. Active Burst Mode (ABM) improves light load performance and achieves extremely low standby power consumption with low output voltage ripple.