IEEE 802.3bt-2018-compliant PSE chipset solves interoperability
Both pre-standard and IEEE-compliant powered devices (PDs) can receive up to 90W of power without changing power over Ethernet (PoE) switches or cabling, using Microchip’s IEEE 802.3bt-2018-compliant PSE chipset.
The chipset eases the transition to using IEEE 802.3bt-2018-compliant PoE injectors and midspans for users, and power sourcing equipment (PSE) chipsets for system developers, claims the company.
Microchip offers the IEEE 802.3bt-2018-compliant PSE chipset. It is available in volume quantities including the PD69208M, PD69204T4 and PD69208T4 PSE managers and PD69210 PoE controller. The PD70224 IdealBridge dual MOSFET-bridge rectifier is also available.
Proprietary solutions available support specifications such as Universal PoE (UPOE) and Power over HDBaseT (PoH). They meet the higher powering needs of two-pair and four-pair PDs including kiosks, POS terminals, thin clients, 802.11ac/ax access points, small cells, smart buildings, industrial automation systems and connected LED lighting. Microchip’s PSE chipset implements the PoH four-pair power standard for 95W PDs. It believes it is the first to also offer an IEEE 802.3af/at/bt chipset that enables pre-standard switches to interoperate with new IEEE 802.3bt-2018-compliant products. Microchip’s IEEE 802.3bt-compliant offering includes PoE injectors and midspans, where users can power any combination of pre-standard and IEEE 802.3bt-2018-compliant PDs by installing the single- or multi-port solutions between PDs and their existing switch. The family includes single- and multi-port options that will also enable new IEEE 802.3bt-compliant switches to power pre-standard PDs.
The range also includes PSE chipset and supporting PDs. The PSE chipset’s design balances thermal dissipation more evenly across the system while enabling scalability for supporting two-pair and four-pair systems with a single board design. It provides all required manager and controller functionality for building power sourcing equipment with the industry’s most extensive interoperability and can source 90 to 99.9W of power per port while supporting up to 48 ports for IEEE 802.3bt Type 3 (Classes 1-6) and Type 4 (Classes 7-8) applications.
There is also the ability to upgrade pre-standard PSE designs based on Microchip’s Gen 6 PSE chipset to IEEE 802.3bt via a software update with no hardware changes.
The dual-pack IdealBridge MOSFET-based full-bridge rectifier device is used on the powered side of the PoE connection and protects PDs against reverse-polarity connections while cutting power, space and costs of delivering IEEE 802.3bt Type 4 Class 8 power.
Evaluation boards, design application notes, firmware, graphical user interface (GUI) software and the communication protocol are available for download.
The injectors and midspans will be available in November 2019.
