Comparing N-Channel and P-Channel MOSFETs: Which is best for your application?
This article compares the n-channel and p-channel power MOSFETs, introduces the complete Littelfuse p-channel power MOSFETs portfolio, and explores target applications.
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A full brick package developed by TDK-Lambda, the PF1500B-360, is for high voltage distributed power architectures
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The reference design uses the patented Inde-Flux transformer technology for isolated feedback, which is sold as part of 15W MCP1012 offline reference design. The transformer combines the signal power and signal communication, eliminating the need for optical feedback or an independent signal transformer. A planar pulse transformer can also be used and the design can work with more traditional optocouplers and signal transformers. The secondary side control is enabled through a combination of the transformer and the MCP1012 AC/DC controller and SAM D20 series 32-bit microcontroller.
The MPC1012 primary side auxiliary controller provides for system start up, gating and protecting an offline flyback converter for the secondary microcontroller. Benefits include direct measurement and active regulation of voltage and/or current, high loop bandwidth by direct loop closure and simplified communication for load-referenced systems.
The reference design provides the principal working elements for a 15W offline power design with the firmware necessary to eliminate the auxiliary power supply on the primary side, including eliminating the need for optocouplers in many applications such as appliances and smart speakers.
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