DC1814A-D

DC1814A-D demonstration circuit features the LTC4274A-4, single port 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 an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A is configured in the DC1814A as an AUTO pin high, MID pin high, autonomous midspan power injector; input data from an existing network system is sent out, along with power to a PD. The LTC4274A autonomously detects a PD, turns power on to the port, and disconnects port power without the need for a microcontroller.

• 90W maximum delivered PD power
• 140W power supply
• Single 55V supply is required to power the DC1814A
• Simple LDO regulator circuit on the board powers the digital supply of the LTC4274A