LTC4274AIUHF-4#PBF - 

制造商：

LINEAR TECHNOLOGY LINEAR TECHNOLOGY

制造商产品编号：

LTC4274AIUHF-4#PBF

仓库库存编号：

2293156

技术数据表：

(EN)

The LTC4274AIUHF-4#PBF is a single Power Sourcing Equipment (PSE) Controller capable of delivering up to 90W of LTPoE++ power to a compatible LTPoE++ Powered Device (PD). A proprietary detection/classification scheme allows mutual identification between a LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing type 1 (13W) and type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. This PSE controller features low-RON external MOSFETs and 0.25R sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation. This power management features include: a 14-bit current monitoring ADC, DAC-programmable current limit and versatile quick port shutdown. PD Discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. The LTC4274A includes an I2C serial interface operable up to 1MHz.

• Low power dissipation
• 0.25R Sense resistance per channel
• Very high reliability 4-Point PD detection
• 2-point Forced voltage
• 2-point Forced current
• High capacitance legacy device detection
• Midspan backoff timer
• Supports 2-pair and 4-pair output power