PD64012 Datasheet, PDF (1/16 Pages) List of Unclassifed Manufacturers – 12-channel PoE Manager

Preliminary Datasheet
PD64012
12-channel PoE Manager
Description __________________
PowerDsine’s™ PD64012 Power over Ethernet
(PoE) Manager chip integrates power, analog and
logic functions into a single 64-pin, plastic pack. It is
used in Ethernet switches and Midspans to allow next
generation network devices to share power and data
over the same cable.
The device is a twelve-port, mix-signal, high-voltage
Power over Ethernet driver. The PoE Manager allows
the detection of IEEE 802.3af-2003 compliant
terminals, referred to as powered devices or PDs,
ensuring safe power feeding and removal over
Ethernet ports. With full digital control via a serial
communication interface and a minimum of external
components, the device integrates in multi-port and
highly populated Ethernet switches.
The PD64012 implements all real time functions
according to IEEE 802.3af-2003, including: detection,
classification, and port status monitoring; as well as
system level activities such as: power management
and MIB support, for system management. The PoE
Manager is designed to detect and disable
disconnected ports, using both DC and AC
disconnect methods, as defined in IEEE 802.3af-
2003.
The PD64012 has two possible working
configurations: an Auto mode (stand-alone topology)
for basic PoE functions and an Enhanced mode for
extended functions.
Pin Configuration _____________
VPORT_POS0
1
VPORT_POS1
2
VPORT_POS2
3
VPORT_POS3
4
VPORT_POS4
5
VPORT_POS5
6
VPORT_POS6
7
VPORT_POS7
8
VPORT_POS8
9
VPORT_POS9
10
VPORT_POS10
11
VPORT_POS11
12
VMAIN
13
CP_IN
14
CP_OUT
15
REF_PORT_NEG
16
PD64012
04202AL1W07
48
VPERI
47
EXT_REG
46
ADC2p5
45
QGND
44
I2CINI
43
VCC2p5
42
ASICINI
41
IREF
40
RESET_N
39
SDA
38
SCL
37
SCK
36
MOSI
35
MISO
34
CS0_N
33
DGND
Features ____________________
♦ IEEE 802.3af-2003 compliant
♦ Drives 12 independent power ports
♦ Can be cascaded for up to 48 ports, using a
master/slave architecture
♦ Supports IETF Power Ethernet MIB (RFC 3621)
♦ Thermal protection per port
♦ Thermal monitoring capabilities
♦ Multi-point resistor detection
♦ Supports DC modulation method under-current
detection according to IEEE 802.3af-2003
♦ AC & DC disconnect functions
♦ PD classification function
♦ Operates from single input (44 to 57 V)
♦ I²C bus interface
♦ Supports foldback current limiting
♦ Digitally programmable overcurrent protection
per port
♦ Digitally programmable timers
♦ Power management algorithm for up to 48 ports
♦ Internal power-on reset
♦ Power soft-start algorithm
♦ Fast power shutdown, in case of power
supply failure
♦ Automatic on/off sequencer for up to 48 ports
♦ Disable/enable power feeding
♦ Continuous port current monitoring
♦ Supports back-off feature for Midspan
implementation
♦ Additional features for Enhanced mode:
• UART interface
• Pre-standard PD detection
• Supports non-standard terminals
• Advanced power management
• Programmable port matrix
Ordering Information
PART
PD64012
TEMP. RANGE PIN PACKAGE
-20 to +85 °C
LQFP-64
Date code: see the bottom line (04202AL1W07) in
the Pin Configuration drawing. “0420” is the date
code. “04” the year (2004), while “20” is the week.
PowerDsine
The Power over Ethernet Pioneers
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