800V and 950V AC/DC integrated power stages expand the fixed-frequency CoolSET portfolio

With its 5th gen fixed-frequency (FF) CoolSET portfolio, Infineon Technologies offers the right components to meet these needs and effectively manage the critical design trade-offs.

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

The FF CoolSET combines a PWM controller IC with the latest high voltage CoolMOS P7 superjunction (SJ) MOSFETs in a single package. The extended portfolio includes the first device on the market that uses an avalanche-rugged SJ MOSFET with a breakdown voltage of 950V to allow for a wider input voltage.

The devices enable both isolated and non-isolated topologies such as flyback or buck and operate at switching frequencies of 100kHz as well as 65kHz. Accommodating both the cost-efficient buck topology and flyback in one single device simplifies the supply chain for customers. An integrated error amplifier supports direct feedback from the primary output, which is typical for non-isolated topologies. Moreover, this further minimises the number of components and design complexity.

The frequency reduction mode with soft gate driving and frequency jitter operation offers lower EMI and enhances the efficiency between mid- and light-load conditions. The devices also support continuous (CCM) and discontinuous conduction mode (DCM).

For low AC line input conditions, CCM operation can achieve lower conduction losses and, thus, a higher efficiency to meet international regulatory standards for energy efficiency. At the same time, the integrated MOSFET supports a wide input voltage range commonly associated with single-phase smart metering and industrial applications. In addition, the devices help to optimise the snubber circuitry to further enhance the efficiency and lower the standby power consumption of the converter.

All devices offer a high level of integration and come with a comprehensive suite of protection features with auto-restart to support the power supply system in failure situations. These protection features, together with the high breakdown voltage of the SJ MOSFET, ensure an increased power supply robustness. On top of that, the active burst mode (ABM) improves the light-load performance and enables ultra-low standby power consumption with small and controllable output voltage ripple.