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PDF PD64012 Data sheet ( Hoja de datos )
| Número de pieza | PD64012 | |
| Descripción | 12-channel PoE Manager | |
| Fabricantes | PowerDsine | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PD64012 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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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.
www.DataSheet4U.com
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
VPORT_POS1
VPORT_POS2
VPORT_POS3
VPORT_POS4
VPORT_POS5
VPORT_POS6
VPORT_POS7
VPORT_POS8
VPORT_POS9
VPORT_POS10
VPORT_POS11
VMAIN
CP_IN
CP_OUT
REF_PORT_NEG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
This document contains information that is proprietary to PowerDsine. As such, it is confidential and its disclosure is strictly prohibited by applicable law. If you and/or your company and PowerDsine
have executed a Non-Disclosure Agreement, then this document is being provided in connection with the Agreement, and the information contained herein is covered by the Agreement and under its
terms may not be disclosed or used and must be protected by you and/or your company.
1 page  
PD64012
12-CHANNEL PoE MANAGER
Pmain = Vmain x I main
Pmain typ. = 48 VDC x 10 mA = 0.480 W.
Pmain max. = 57 VDC x 15 mA = 0.855 W
Device Power Dissipation – the PD64012 incorporates 12 power MOSFETs, each characterized by:
Resistance from drain-source Rds(on) = 0.3 Ω typ. ; 0.5 Ω max.
Drain-source current Ids = 360 mA max.
Maximum power dissipation PMOSFET max. of a single PD64012 device (for 12 MOSFETs) :
[(Ids)2 x Rds(on)] x 12 = [(0.36 A)2 x 0.5 Ω] x 12 = 0.78 W
Charge pump (see Analog Section of Block Diagram Description, hereafter) power dissipation PCP is 0.21 W.
Total power dissipation Ptotal by device, under maximum conditions:
Ptotal = Pmain max. + PMOSFET max. + PCP = 0.855 W + 0.78 W + 0.21 W = 1.845 W
OVL_S
Ilim
Icut
Tcut
OVL
Ichannel
Port 1
Port 2
Imin
Port off
UDL_S
UDL
Tmin
Figure 2: Power Limits
Protection Mechanism
The PD64012 includes internal thermal protection to avoid junction overheat. Three types of temperature sensors
are integrated into the device: two are used for protection and one for temperature monitoring.
Hi-temp protection – the device contains thermal shutdowns. This protection system is activated in extreme
conditions.
Lo-temp protection – there are thermal sensors that are intended to protect the functionality of the device, in
cases of temperature rise.
Indicator sensors – four temperature sensors monitor the local temperature in the device. Their average is also
calculated by the PD64012. All values are stored in internal registers for data retrieval. The register values are
calculated by:
Decimal value = 684 - 1.514 x [(Tjunc)+ 40 °C].
www.powerdsine.com
06-0003-058 (Rev. 2.8) / 5 August 2004
5
© PowerDsine 2003
Information in this document subject
to change without prior notice.
5 Page 
PD64012
12-CHANNEL PoE MANAGER
I2C Interface
A standard I2C interface is used to communicate between the PD64012 and the host controller.
The PD64012’s I2C interface is designed to support the following features:
♦ SLAVE mode only
♦ Normal-mode and Fast-mode data rate (0 to 400 kb/s)
♦ 7-bit addressing - the 7-bit addressing (128 addresses) uses the following address code:
• First MSB = “0” (forced by internal logic)
• 4 MSB address bits are set via the I2C_INI pin, according to the following table
• “mm” bits are set through the ASIC_INI pin (Enhanced mode = “00”; Automatic mode Master
=”00”; Automatic mode Slave = “01”, “10”, “11”)
• “xxx” - 3 LSB are ignored.
I2C ADDRESS I2C_INI VOLTAGE LEVEL I2C_INI INTERNAL A/D REGISTER
NOTES
Address #0
Address #1
Address #2
Address #3
Address #4
Address #5
Address #6
Address #7
Address #8
Address #9
Address #10
Address #11
Address #12
Address #13
Address #14
Address #15
0 to 0.15 V
0.16 to 0.31 V
0.32 to 0.47 V
0.48 to 0.62 V
0.63 to 0.77 V
0.78 to 0.93 V
0.94 to 1.09 V
1.10 to 1.24 V
1.25 to 1.40 V
1.41 to 1.55 V
1.56 to 1.71 V
1.72 to 1.87
1.88 to 2.02 V
2.03 to 2.18 V
2.19 to 2.33 V
2.34 to 2.5 V
0,0000,mm,xxx
0,0001,mm,xxx
0,0010,mm,xxx
0,0011,mm,xxx
0,0100,mm,xxx
0,0101,mm,xxx
0,0110,mm,xxx
0,0111,mm,xxx
0,1000,mm,xxx
0,1001,mm,xxx
0,1010,mm,xxx
0,1011,mm,xxx
0,1100,mm,xxx
0,1101,mm,xxx
0,1110,mm,xxx
1,1111,mm,xxx
General call addresses; not to be
used
www.powerdsine.com
06-0003-058 (Rev. 2.8) / 5 August 2004
11
© PowerDsine 2003
Information in this document subject
to change without prior notice.
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet PD64012.PDF ] | |
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