Kinetic Technologies has expanded its power over Ethernet (PoE) power solutions portfolio with the introduction of the single-chip KTA1136, a highly integrated 13-W PoE powered device (PD) that reduces solution size and cost. The PoE PD, fully compliant with the IEEE 803.2af specification, integrates input surge protection, a PD controller with a 100-V, 0.49 Ω hot-swap MOSFET, and a DC/DC controller with a 150-V, 0.7 Ω switching power MOSFET.
Addressing EMI and surge/over-voltage protection in PoE applications, the on-chip integration of surge protection provides a faster response to surge events and limits stray surge current from passing through sensitive circuits, said the company.
The integration of the 150-V output MOSFET with the 600-kHz switching frequency results in more than a 25% reduction in solution size compared to 13-W PoE solutions in the market today, said Phil Dewsbury, senior director of ESIA marketing at Kinetic. “Special care has been taken to minimize EMI and to optimize the light load efficiency without the switching frequency straying into the audio band.”
The KTA1136 also includes PD detection, classification, and protection including under-voltage lockout (UVLO) and over-temperature protection (OVP). In addition to IEEE 803.2af compliance, the PoE PD supports IEEE 803.2at and IEEE 802.3bt specifications for Type 1 power applications. It provides input ESD surge protection to IEC61000-4-2 Level 4 (±8 kV contact, ±15 kV air).
Other key features include an adjustable switching frequency from 100 kHz to 800 kHz, programmable cycle-by-cycle DC/DC current limiting, and support for both isolated and non-isolated applications. The operating temperature range is -40°C to 85°C. Key applications include voice over IP (VoIP) phones, wireless LAN access point, security cameras, biometric authentication, point-of-sales terminals, RFID readers, thin clients, and IoT appliances.
The KTA1136, housed in a TQFN-16, 4 ×4-mm package, is available now. The device is RoHS compliant and lead-free.
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