KTA1137A 13W/30W 802.3af/at PoE PD and Integrated DC-DC Controller

The KTA1137A is the latest PoE product from Kinetic Technologies. Pin to pin and functionally compatible with the AS1138*, the KTA1137A features increased input protection and lower resistance.

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  • Full support of both IEEE® Std. 802.3af-2005 and IEEE® Std. 802.3at-2009 power requirements
  • “2-Event” classification for 802.3at higher power PDs
  • Robust Type 2 PSE detector with proprietary digital filtering for line noise to eliminate false positives
  • IEC 61000-4-2/3/4/5/6 requirements for EMC Compliance
  • Integrated Surge Protection for 15kV/8kV System level ESD Compliance
  • Exceptional EMI performance
  • Programmable DC current limit up to 730mA for 30W applications
  • Seamless support for local power, down to 9.5V
  • Low Rds-on Hot-Swap FET (typical 0.6Ω)
  • Integrated Short-Circuit Protection
  • Over temperature protection
  • 5×5 mm, 20 lead QFN Package
  • Industrial temperature range (-40°C to +85°C)


  • Pan, tilt and zoom (PTZ), security and web cameras
  • Voice over IP (VoIP) phones
  • Wireless LAN access points, WiMAX terminals
  • Point-of-sale (PoS) terminals, RFID terminals
  • Thin clients and notebook computers
  • Fiber-to-the-home (FTTH) terminals

*One small resistor value change required.

Key Electrical Specifications

Vin(Min) Vin(Max) PoE PD Support Control  Topology Number of Output Rails High Voltage Isolation Package
9.5V 57V 802.3af&at HW Mode Flyback 1 External QFN-5×5-20L-0.9

Typical Application Diagram


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