Optimized performance, efficiency and reliability in high voltage power supplies need to be combined with reduced bill of materials (BOM) count and cost, as well as reduced design efforts. With its 5th Fixed Frequency Generation (FF) CoolSET portfolio, Infineon Technologies offers the ideal components to meet these needs and effectively manage critical design tradeoffs.
The new 800 and 950 V AC-DC Integrated Power Stages (IPS) are housed in a DIP-7 package and serve applications such as auxiliary power supplies for home appliances, AC-DC converters, battery chargers, solar power systems and engine control. and units.
The FF CoolSET solution combines a PWM controller IC with the latest high voltage CoolMOS P7 superjunction (SJ) MOSFETs in a single package. The expanded portfolio now includes the first device on the market that uses an avalanche-resistant SJ MOSFET with a breakdown voltage of 950 V to enable a wider input voltage.
The new devices allow for isolated and non-isolated topologies, such as flyback or buck, and operate at switching frequencies of 100 kHz and 65 kHz. Accommodating cost-effective buck topology and flyback in a 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. Furthermore, this further minimizes the number of components and project complexity.
Frequency reduction mode with smooth gate drive and frequency jitter operation provides lower EMI and increases efficiency between medium and light load conditions. The devices also support continuous (CCM) and discontinuous (DCM) conduction mode. For low AC line input conditions, CCM operation can achieve lower conduction losses and higher efficiency to meet international energy efficiency regulatory standards.
At the same time, the integrated MOSFET supports an ultra-wide input voltage range commonly associated with single-phase smart measurements and industrial applications. Additionally, the devices help optimize the snubber circuit to further increase efficiency and reduce the converter's standby power consumption.
All new devices offer a high level of integration and come with a comprehensive set of automatic reset protection features to support the power system in failure situations. These protection characteristics, together with the high breakdown voltage of the MOSFET SJ, guarantee greater robustness of the power supply. Additionally, active burst mode improves light load performance and enables ultra-low standby power consumption with small, controllable output voltage ripple.