PoE PD plus DC-DC controller provides faster response to surge events

Kinetic Technologies AS1113 and AS1114 13W PoE PD plus DC-DC Controllers, available now from Mouser, are single-chip, highly integrated CMOS solutions for PoE. The PoE Controllers combine rectification and protection circuitry, a PD controller, and a DC-DC controller. This high level of integration gives a faster response to surge events and restricts stray surge current from passing through sensitive circuits, such as the Ethernet PHY device. These devices are intended to offer a safe low impedance discharge paths directly back to the earth ground, following in superior reliability and circuit protection. The devices have also been created to address both EMI concerns and Surge/Over-Voltage Protection in PoE applications. The devices achieve many design features that minimise transmission of system common-mode noise on to the UTP cable. The AS1113 PoE PD controller features a switching frequency range of 325kHz to 375kHz. The AS1113 also comprises an MPS function, that offers an internal load to meet the minimum 10mA of DC current needed to present a valid DC MPS indication to the PSE. The AS1114 PoE PD controller offers a switching frequency range of 135kHz to 245kHz, and the MPS function is disabled. Both devices are provided in a 20-pin, 5mm x 5mm RoHS compliant QFN package.