USB power delivery
USB power delivery electronic design
The USB PD standard (USB power delivery) allows to charge quickly via a USB connection. The specification caters to much higher power ratings than typical smartphone-based charging designs, as it is intended to power hard drives, printers, and displays, as well as larger portable electronics like laptops. In other words, it enables increased power levels from existing USB standards. The maximum 100 W power supply is achieved with 20 V and up to 5 A. Making use of the highest power modes also requires specially rated USB cables, as standard cables are only rated for 7.5W at most. In addition to faster charging, this USB standard enables both host and peripheral devices to provide power, the power direction is no longer fixed. Essential is the communication of a suitable Power Rule, i.e. the source and the host exchange their requirements to figure out how much power to transfer. In this way, power management across multiple peripherals is optimized. Each device is supplied only the power it requires (e.g. low power cases such as headsets vs a laptop being a high power case).
Discover the reference designs, boards, and design support documents.
System diagram: USB power delivery
10W to 75W converter designs based on flyback topology or DCM PFC topology
The 700 V CoolMOS? P7 offers a price competitive solution for consumer applications such as chargers and adapters in the power range from 10 W to 75 W. This product addresses the low power SMPS market where it tackles common barriers through excellent performance and ease-of-use. The named power converters are typically based on flyback topologies. 700 V CoolMOSTM P7 is a tailored technology optimized for flyback and DCM (discontinuous current mode) PFC applications. SOT-223 offers a smaller footprint while being pin-to-pin compatible with DPAK while achieving similar thermal performance.
Forced frequency resonant flyback controller for high-density adapters
The XDPS21071 is a digital PWM controller for high-density adapter applications based on DCM flyback topology. Check the reference design schematics for a 45W USB power delivery solution.
OptiMOS? PD optimized for Sync Rectification
OptiMOS? PD is a N-channel power MOSFET family meeting highest efficiency standards even in a compact 3x3 package, achieves a lower temperature in a 3x3 package compared to the next best alternative in 5x6. BOM cost reduction can be achieved as the parts are fully driven from 4.5V (low threshold voltage) by minimized on-state resistance, low gate, output and reverse recovery charges.
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This document is a description of the 45 W 5/9/12/15/3 A or 20 V 2.25 A, 90 V AC ~ 265 V AC input off-line Forced Frequency Resonant (FFR) Zero Voltage Switching (ZVS) Flyback converter demonstrator board using the Infineon digital FFR Flyback controller XDPS21071 and MOSFETs IPD70R360P7S, BSC0805LS and BSL606SN.