The CoolMOS P7. Infineon pushes efficient home power designs

The CoolMOS P7 series greets you in Infineon’s online catalog with a grid of tiny black TO?220 and TO?247 packages, pins shining under studio light like neatly trimmed nails on a workbench. In a lab in Neubiberg, product manager Markus Droll explains how these superjunction MOSFETs quietly cut heat and wasted watts in common power supplies.

From water heater to phone charger

Infineon positions CoolMOS P7 as a mainstream superjunction MOSFET family for hard?switching topologies in consumer and industrial power supplies. Typical uses range from AC?DC adapters and chargers through PC power supplies to small home appliances and smart meters, all operating from the mains.

The flagship 600 V CoolMOS P7 devices target efficiency upgrades in designs that previously relied on conventional MOSFETs with higher switching losses. On Infineon’s product pages, engineers can filter by R_DS(on), package, and qualification level, then dive into spice models and application notes. A short application note shows oscilloscope traces comparing switching losses against older generations, with crisper edges and lower ringing as gate charge is reduced.

Technical details with a practical edge

CoolMOS P7 is built on Infineon’s latest superjunction technology, delivering lower conduction and switching losses than classical high?voltage MOSFETs at comparable voltage classes. Devices are available from 600 V up to about 700 V breakdown voltage depending on the specific part, covering universal mains applications including 230 V AC European grids. Engineers can choose from resistance values down to around 40 m? R_DS(on) in certain packages, balancing conduction loss and cost.

Infineon’s datasheets highlight a softer gate?charge profile designed to ease EMI compliance without heavy snubber networks. In practice that means less whine from cheap phone chargers and fewer hot spots on compact adapter boards, as switching energy is cut per cycle. In a teardown blog cited by Infineon, a reviewer notes that a notebook adapter using CoolMOS P7 keeps its plastic shell only lukewarm after a two?hour load test. The internal thermal photos show a more even heat spread around the primary switch.

Packages and safety qualifications

Infineon offers CoolMOS P7 in common through?hole packages like TO?220 and TO?247 as well as surface?mount variants such as DPAK and D2PAK, plus more compact SMD forms for high?density boards. That mix lets appliance designers choose a stable, screw?mounted device, while adapter makers can shrink layouts with automated soldering. Many CoolMOS P7 parts carry JEDEC qualification and specified temperature ranges up to 150 °C junction, supporting demanding thermal environments.

For designs that must comply with reinforced isolation and creepage standards, Infineon publishes detailed package drawings and recommendations. A safety note on the site reminds engineers to respect clearance distances around high?voltage pins in open?frame supplies. In a recent webinar, Infineon engineer Petra Schmid walks through layout tips: keep switching loops tight, place the CoolMOS P7 near the transformer primary, and avoid aggressive copper pours under the package tab to prevent stress cracking.

How Infineon prices and sells CoolMOS P7

CoolMOS P7 is sold worldwide through Infineon’s own distribution and partners such as Digi?Key and Mouser, with pricing visible for most key SKUs. Typical distributor prices for mid?range 600 V devices land roughly between 1 and 3 US dollars per unit in medium volumes, depending on resistance and package. For high?volume appliance makers signing framework contracts, Infineon negotiates tailored pricing and logistic support, often pairing CoolMOS P7 with gate drivers and controllers.

Infineon does not publish a single MSRP for CoolMOS P7, as the line spans dozens of variants and target markets. Instead, the company frames it as a cost?effective choice in the superjunction category. In a recent interview, CEO Jochen Hanebeck mentioned that consumer power electronics remain a solid contributor to the Power & Sensor Systems segment, even as automotive and industrial power grow faster. The smooth pins of a CoolMOS P7 may not look glamorous, but they still move millions of units into everyday devices.

Competitive landscape and design trade?offs

CoolMOS P7 competes with superjunction MOSFET families from peers like STMicroelectronics, ON Semiconductor, and Vishay, all targeting similar voltage and power ranges. Tests in independent application notes show that performance gaps between leading families are narrow; design nuances in gate driver and PCB layout often matter more than raw silicon figures. Infineon therefore stresses ecosystem support: models, reference designs, and field application engineers who will review schematics.

One trade?off designers face is between absolute efficiency and EMI margin. Aggressive edge rates reduce switching losses but can worsen conducted and radiated emissions, demanding filters that add cost and size. CoolMOS P7’s tuning aims for a middle path: lower gate charge than classic MOSFETs, but with controlled dv/dt behaviour to keep emissions manageable. In lab demos, Markus Droll likes to show side?by?side spectral plots, where the P7 line sits a few decibels lower in critical bands.

Infineon Technologies AG stock context

For Infineon, CoolMOS P7 is one brick in a broad power semiconductor wall that includes IGBTs, SiC MOSFETs, and GaN devices. While SiC and GaN attract more headlines, high?volume silicon MOSFETs in consumer and industrial applications still generate meaningful cash flow. The Infineon Technologies AG share (ISIN DE0006231004) is listed on Xetra, where investors track these legacy but resilient product lines alongside newer wide?bandgap growth stories.