Copyright © 2013 Microsemi
Rev. 1.7, 17-July-2013 Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Phone (USA): (800) 713-4113, (ROW): (949) 221-7100 Fax: (949) 756-0308
1 Port PSE PoE PD69101 Controller
Microsemi's PD69101 is a single port, mixed-signal, high-voltage
Power over Ethernet driver. The device is utilized in Ethernet
switches and enables network devices to share power and data
over the same cable. It enables detection of IEEE802.3af-2003
compliant PDs (Powered Devices) and IEEE802.3at High Power
Devices, thus, ensuring safe power feeding and disconnection of
ports with full digital control and a minimum of external
components. Integrating power, analog and state of the art logic,
the PD69101 device fits into a single 24-pin, plastic QFN package.
A “plug and play” device, the PD69101 executes all real time
functions as specified in the IEEE802.3af-2003 (“AF”) and
IEEE802.3at High Power (“AT”) standards, including load detection,
“AF” and “AT” classification, and using Multiple Classification
Attempts (MCA).
The PD69101 :
Is designed to detect and disable disconnected ports,
utilizing DC disconnection methods, as specified in the
IEEE 802.3af-2003 and IEEE802.3ar-2009 standards.
Can optionally detect legacy/pre-standard PD devices.
Provides PD protection such as over-load, under-load,
over-voltage, over-temperature and short-circuiting.
Supports supply voltages ranging from 44 V to 57 VDC
with no need for additional power supply sources.
Is a low power device using an internal 0.34 Ω MOSFET
and an external 0.5 Ω sense resistor.
The chip includes built-in internal thermal protection.
Two LEDs provide port state's indication and port type (AF/AT).
Fully IEEE802.3af-2003 and
IEEE802.3at-2009 compliant
Includes two-event classification
Supports pre-standard PD detection
Supports Cisco devices detection
Single DC voltage input (44 - 57 VDC)
Supports 2 Pairs and 4 Pairs (Data
and Spare Power Feeding)
V
MAIN
Out of Range Protection
Wide temperature range: -40° to
+85° C
Over-temperature protection
Low thermal dissipation (0.5 Ω sense
resistor)
Includes on/off command pin
2 x direct LEDs drive
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 regulator
Internal power on reset
RoHS compliant
Low Rdson FET: 0.3 Ω
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
TYPICAL THERMAL RESISTANCE-JUNCTION TO AMBIENT 25° C/W
RoHS Compliant / Pb-free / MSL1
TYPICAL THERMAL RESISTANCE-JUNCTION TO CASE 4° C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
JA
).
The
JA
numbers are guidelines for the thermal
performance of the device/pc-board system. All of the
above assume no ambient airflow.
