Newly introduced by Linear Technology are the LTC4266A and LTC4274A, four-port and single-port Power over Ethernet (PoE) controllers for power sourcing equipment (PSE), delivering up to 90 W of power to powered devices (PDs).
The current IEEE standard, 802.3at (also known as PoE+), limits the maximum available power to PDs to 25,5 W. By the time the standard was ratified in 2009, applications were already demanding higher power levels. The LTC4266A and LTC4274A address this higher-power PoE market using Linear’s LTPoE++ signalling scheme to mutually identify and provide PDs with up to 90 W of power, while ensuring backward compatibility and interoperability with equipment based on the existing IEEE PoE standard.
Linear offers high-power versions covering 35 W, 45 W, 70 W and 90 W power levels, so that discrete components and magnetics can be sized accordingly. Low-power 13 W versions, the LTC4266C and LTC4274C, are also now available for fully automatic Type 1 PoE systems.
The LTC4266A and LTC4274A enable a new generation of high power PoE applications, including long range wireless access points (WAP), thin clients and heated surveillance cameras. Capabilities of the LTC4266A and LTC4274A include very low power dissipation across low-RDS(ON) MOSFETs and sense resistors (0,34 Ω total per port).
LTPoE++ PDs can request up to 90 W of power by responding to a proprietary classification mechanism, confirming that the PD is indeed a high-power LTPoE++ compliant device. Very high reliability PD discovery is accomplished using a proprietary dual-mode, four-point detection mechanism that ensures immunity from false PD detection.
Linear’s PSE controllers offer advanced power management that includes prioritised fast shutdown, accurate 14,5-bit per port voltage and current read-back, 8-bit programmable current limits and 7-bit programmable overload current limits. A 1 MHz I²C interface allows a host controller to digitally configure the IC or to query port readings. Firmware is conveniently field upgradable.
Next-gen power meter Electrocomp Express
Power Electronics / Power Management
The VT-PWR-LV is a next-gen Vista Touch power meter from Trumeter for single, split, and three-phase systems.
Read more...Wi-Fi 6 and Bluetooth LE co-processor Altron Arrow
Telecoms, Datacoms, Wireless, IoT
STMicroelectronics has released its ST67W611M1, a low-power Wi-Fi 6 and Bluetooth LE combo co-processor module.
Read more...Advanced PMIC for high-performance AI applications ASIC Design Services
Power Electronics / Power Management
Microchip Technology has announced the MCP16701, a Power Management Integrated Circuit (PMIC) designed to meet the needs of high-performance MPU and FPGA designers.
Read more...1-Wire EEPROM with secure authenticator Altron Arrow
DSP, Micros & Memory
The DS28E54 secure authenticator combines FIPS 202-compliant secure hash algorithm (SHA-3) challenge and response authentication with secured electrically erasable programmable read-only memory.
Read more...New SiC power MOSFET Future Electronics
Power Electronics / Power Management
STMicroelectronics’ SCT012H90G3AG is a robust, automotive-grade SiC MOSFET, engineered for demanding power electronics, featuring a 900?V drain-source voltage and exceptionally low on-resistance of 12?mO at 60?A.
Read more...Fundamental motor control design challenges and solutions
Power Electronics / Power Management
Mouser Electronics has announced a new eBook in collaboration with Qorvo, featuring industry experts providing key insights into methods, power efficiency and integration solutions available for motor control applications.
Read more...The 6 GHz band radio solution Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Analog Devices’ 16 nm transceiver family offers a highly integrated solution for this new frequency band, featuring low power consumption and high performance.
Read more...Power management IC for battery products
Power Electronics / Power Management
The nPM1304 PMIC complements Nordic’s nPM1300 PMIC with a highly integrated, ultra-low power solution and precision fuel gauging for small size battery applications.
Read more...New clock generator family Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Based on Skyworks’ fifth generation DSPLL and MultiSynth technologies, these devices enable any-frequency, any-output clock generation.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version