PD69108 データシートの表示（PDF） - Microsemi Corporation
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PD69108 Datasheet PDF : 17 Pages
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DESCRIPTION
PD69108/F
8 PORTS PSE POE MANAGER
DATASHEET
KEY FEATURES
Microsemi’s PD69108 Power over Ethernet (PoE) Manager
integrates power, analog and state of the art logic into a single
48 pin, plastic QFN package. The device is used in Ethernet
switches and Midspans, enabling network devices to share power
and data over the same cable.
The PD69108 device is an 8 ports, mixed-signal, high-voltage PoE
driver. It enables detection of IEEE802.3at-2009 compliant Type 1
and Type 2 PDs (Powered Devices), ensuring safe power feeding
and disconnection of ports with full digital control and a minimum of
external components.
The PD69108 executes all real time functions as specified in the
IEEE802.3af-2003 (“AF”) and IEEE802.3at-2009 High Power (“AT”)
standards, including load detection and “AF” and “AT” classification.
In addition, the PD69108 features Multiple Classification Attempts
(MCA) port status monitoring, and provides system level activities
such as power management and MIB support for system
management.
The PoE device is designed to detect and disable disconnected
ports utilizing DC disconnection methods, as specified in the IEEE
802.3af-2003 and IEEE802.3at-2009 standards.
The unit provides PD protection such as over-load, under-load,
over-voltage and short-circuiting. It supports supply voltages
ranging from 44 to 57 VDC with no need for additional power supply
sources. The chip includes built-in internal thermal protection.
Optionally, the PD69108 can detect legacy/pre-standard PD
devices.
The PD69108 is a low power device using an internal MOSFET and
an external 0.36 Ω sense resistor.
IEEE802.3af-2003 compliant
IEEE802.3at-2009 compliant,
including two-event classification
Supports pre-standard PD detection
Supports Cisco devices detection
Single DC voltage input (44 to 57
VDC)
Input voltage out of range protection
Wide temperature range: -10°C to
+85°C
PD69108F version covering -40°C to
+85°C
Over-temperature protection
Low power dissipation (0.36 Ω sense
resistor and 0.3Ω MOSFET Rdson)
Includes Reset command pin
4 x direct address configuration pins
Continuous port monitoring and
system data
Configurable load current setting
Configurable AT/AF modes
Configurable standard and legacy
detection mode
Power soft start mechanism
On-chip thermal protection
Voltage monitoring/protection
Built in 3.3 VDC and 5 VDC regulators
Internal power on reset
RoHS compliant
Emergency power management
supporting four configurable power
bank I/Os
Can be cascaded to up to 12 PoE
devices (96 ports)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Copyright © 2013
Microsemi
1
Rev. 1.6
Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Within the USA: (800) 713-4113, Outside the USA: (949) 221-7100 Fax: (949) 756-0308
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