KTA1140
December 2023 – Revision 04a Page 1 of 25 Kinetic Technologies Confidential
IEEE 802.3bt-Compliant, Powered Device Interface Controller
Features
• Fully supports IEEE® Std. 802.3bt
• Supports Input Power Levels Up to 90W
• Compatible with both IEEE® Std. 802.3af/at
• Support Class 0-8 for PD
• Robust Type 1, 2, 3 and 4 PSE detector with
proprietary digital filtering line noise
• Auto-adjust Maintain Power Signature (MPS) for type
1-4 PSE
• Supports up to 5 Event Classification
• Programmable DC current limit up to 2.3A for 90W
applications
• IEC 61000-4-2/3/4/5/6 requirements for EMC
Compliance
• Exceptional EMI performance
• Low Rds-on 100 V Hot-Swap FET (typical 0.1Ω)
• Integrated Short-Circuit Protection
• Over temperature protection
• Seamless support for local power down to 9.5V
• Supports Low Power Standby Modes
• 5x5 mm, 20 lead WQFN Package
• -40°C to +125°C Junction Temperature Range
Applications
• Pan, tilt and zoom (PTZ), security and web cameras
• Voice over IP (VoIP) phones
• Lighting and High Power Wireless Data Systems
• Wireless LAN access points, WiMAX terminals
• Point-of-sale (PoS) terminals, RFID terminals
• Thin clients and notebook computers
• Fiber-to-the-home (FTTH) terminals
Brief Description
The KTA1140 is a single-chip, highly integrated CMOS
solution for Power over Ethernet (PoE) Powered
Devices requiring input power of up to class 8 and
90Watts. Applications include Voice over IP (VoIP)
Phones, Wireless LAN Access Point, Security Cameras,
WiMAX Terminals, Point-of-Sales Terminals, RFID
Readers, Thin Clients and Notebook computers.
The KTA1140 implements all of the physical layer
Powered Device (PD) functionality, as required by IEEE®
802.3af-2003, IEEE® 802.3at-2009 and IEEE® 802.3bt-
2018 standards. This includes 5-event classification,
Type 1-2 or 3-4 PSE detection indicators (PST1/2 and
PSDBT), PD detection, under-voltage lockout (UVLO),
and Hot-Swap FET integration.
The KTA1140 has been architected to address EM
emission concerns in PoE applications. The chip
implements many design features that minimize
transmission of system common-mode noise onto the
Unshielded Twisted Pair (UTP).
The device is designed to provide safe, low-impedance
discharge paths directly to the earth ground, resulting
in superior reliability and circuit protection.
Typical Application
Signature, Extended
Classification
Thermal
Limit
Protection
Current
Limit
Sense
UVLO
PD Controller
Local
Power
DC-DC
Controller
P-MOS
N-MOS
KTA1140
RJ45
Vout
KTA1140
December 2023 – Revision 04a Page 2 of 25 Kinetic Technologies Confidential
Ordering Information
Part Number
Operating Temperature
Package
KTA1140EUAQ-TB
-40°C to +125°C Junction Temperature
WQFN55-20
Pinout Diagram
TOP VIEW
KTA1140
SQYYZZZZ
aabbccc
TOP VIEW
EP
11
12
13
14
15
5
4
3
2
1
20 19 18 17 16
6 7 8 9 10
GND
NC
VIN
NC
VOUT
LVMODE
AMPS
MPSD
GND
PG
GND
VDD
RCUR
RCL1
RCL2
DET
AUT
PSDBT
PST2
PST1
Top Mark
WQFN-55-20 Package
(5.00mm x 5.00mm x 0.75mm)
SQ= Device Code, YY= Date Code, ZZZZ= Serial Number
aabbccc = Serial Number of Assembly Lot
1
. SQ = Device Code, YY - Date Code, ZZZZ - Serial Number.