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Preliminary Datasheet
12-channel PoE Manager
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:
PD64012
Description __________________
PowerDsine'sTM 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 802.3af2003. 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 _____________
PORT_SENSE0 PORT_SENSE1 PORT_SENSE2 PORT_SENSE3 PORT_SENSE4 PORT_SENSE5 VPORT_NEG0 VPORT_NEG1 VPORT_NEG2 VPORT_NEG3 VPORT_NEG4 VPORT_NEG5 SENSE_NEG Reserved Reserved
AGND
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 17 TEST_MODE 18 VPORT_NEG11 19 AGND 20 21 22 23 24 25 26 27 28 29 30 31 32
48 47 46
VPERI EXT_REG ADC2p5 QGND I2CINI VCC2p5 ASICINI IREF RESET_N SDA SCL SCK MOSI MISO CS0_N DGND
PD64012
45 44 43 42 41 40 39 38 37
* * * * *
UART interface Pre-standard PD detection Supports non-standard terminals Advanced power management Programmable port matrix
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
04202AL1W07
Ordering Information
PART PD64012 TEMP. RANGE -20 to +85 C PIN PACKAGE LQFP-64
36 35 34 33
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.
DISABLE_PORTS
PORT_SENSE11
PORT_SENSE10
VPORT_NEG10
PORT_SENSE9
PORT_SENSE8
PORT_SENSE7
PORT_SENSE6
VPORT_NEG9
VPORT_NEG8
VPORT_NEG7
VPORT_NEG6
PowerDsine
CS1_N
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.
PD64012 12-CHANNEL PoE MANAGER Maximum Ratings ______________________________________________
Vmain......................................................... -0.3 to 80 V(1) DGND, AGND, QGND, SENSE_NEG..............-0.3 to 0.3 V(2) -0.3 to 80 V(1) MISO, MOSI, SCK, SCL, SDA, CLK, RESETN, CS0_N, CS1_N................ -0.3 to (VPERI + 0.3) V VPORT_POSx ............................................ VPORT_NEGx, REF_PORT_NEG VPORT_POSx - VPORT_NEGx ESD (Human Body Model)....................... -2 to 2 kV(3) Max junction temperature (Tjunc).................+150 C Junction-ambient thermal resistance (JA)..... 25 C/W Junction-case thermal resistance (JC).........16 C/W Lead temperature (soldering, 10 s)............. 300 C Storage temperature................................-40 to +125 C
PORT_SENSEx......................................... -0.3 to 15 V VCC2p5, ADC2p5............................................-0.3 to 3 V VPERI......................................................... 4 V EXT_REG.................................................. -0.3 to 6 V I2CINI, ASICINI.......................................... -0.3 to 3 V
Notes: "x" defines port numbers, 0 thru 11, inclusive. (1) 80 V is the transient voltage that can be applied for at most one minute. (2) Maximum value between grounds. (3) ESD testing is performed in accordance with the Human Body Model (CZap = 100 pF, RZap = 1500 ). Stresses beyond those listed above, may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods, may affect device reliability.
Operating Conditions ___________________________________________
PARAMETER Operating temperature Operational limitations (1)
(1)
MIN. -20 15 to 44 44 to 55
NOM. +85 55 to 57
MAX.
UNIT C V
Operating functions depend on the input voltage, as shown in the distribution of Figure 1.
AC Disconnect (only up to 55 V)
PoL 802.3af Compliance (from 44 to 57 V)
Communications (operates over entire range)
15
44
55
57 V
Figure 1 - Operational Ranges
Electrical Characteristics ________________________________________
DC Characteristics for Digital Inputs and Outputs
PARAMETER Pin Name Type High level input voltage Low level input voltage Input voltage hysteresis Input high current Input low current SYMBOL MIN. MAX. UNIT DISABLE_PORTS Schmitt Trigger CMOS input, TTL level with internal pullup VIH 2.0 V VIL 0.8 V 0.3 V IIH +10 +150 A IIL NA NA A REMARKS
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PD64012 12-CHANNEL PoE MANAGER
DC Characteristics for Digital Inputs and Outputs (continued)
PARAMETER Pin Name Type High level input voltage Low level input voltage Input voltage hysteresis Input high current Input low current Pin Name Type High level input voltage Low level input voltage Input voltage hysteresis Input high current Input low current High level output voltage Low level output voltage Tri state output current Pin Name Type High level input voltage Low level input voltage Input voltage hysteresis OFF state output current SYMBOL MIN. MAX. UNIT SCL Schmitt Trigger CMOS input, TTL level with internal pullup VIH 2.0 V VIL 0.8 V 0.3 V IIH NA NA A IIL -150 -10 A MOSI, MISO, CS0_N, CS1_N, SCK CMOS I/O, TTL level with no internal pull up/pull down resistor VIH 2.0 V VIL 0.8 V 0.3 V IIH -1 +1 A IIL -1 +1 A VPERI-0.4V V Iout = 3 mA 0.4 V Iout = 3 mA -1 +1 A RESET_N, SDA CMOS open drain output with Schmitt Trigger input, TTL level 0.4 V Iout = 3mA VIL 0.8 V 0.3 V -1 +1 A REMARKS
Electrical Characteristics for Analog I/O Pads
PARAMETER Pin Name Operating voltage Pin current consumption Pin Name Operating voltage Internal current consumption Pin Name Operating voltage Vmain current consumption Pin Name Operating voltage Pin current consumption Pin Name ADC2p5 output voltage ADC2p5 internal current consumption VCC2p5 output voltage VCC2p5 internal current consumption VPERI output voltage VPERI external current load EXT_REG output current MIN. MAX. UNIT REMARKS VPORT_POSx, VPORT_NEGx, REF_PORT_NEG 44 62 V Port driver off, Vport differential measurement off, AC -5 +5 A generator off PORT_SENSEx With external 2 ohms (1%) to ground 0 1.48 V 20 A VMAIN 44 57 V Total on Vmain 20 mA CP out 44 67 V 5 mA ADC2p5, VCC2p5, VPERI, EXT_REG 2.45 2.55 V 6 2.37 3.13 2.62 5 3.46 6 6 mA V mA V mA mA Recommended external cap. = 47 to 135 nF Recommended external cap. = 47 to 135 nF Recommended external cap. = 1 to 4.7 F Without external NPN When using external NPN for VPERI
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PD64012 12-CHANNEL PoE MANAGER
Electrical Characteristics for Analog I/O Pads (continued)
PARAMETER Pin Name Operating voltage Current consumption Pin Name Output voltage MIN. MAX. ASICINI, I2CINI 0 ADC2p5 -1 +1 IREF 1.21 1.34 UNIT V A V With external 24.9 k resistor to ground REMARKS
Dynamic Characteristics
The PD64012 is an advanced power-limiting device that uses three programmable current level thresholds (Imin, Icut, Ilim) and two timers (Tmin, Tcut ), to operate as shown in Figure 2. Loads that dissipate more than Icut for longer than Tcut (OVL_S to OVL) are classified as overloads and are automatically shutdown. Output power dissipation below Imin for during more than Tmin (UDL_S to UDL) will be classified as no-load and will also be shutdown. Automatic recovery from overload and no-load conditions are attempted every TOVLREC and TUDLREC periods (typically 5 and 1 seconds, respectively). In any case, output power is limited to Ilim, which is a maximum peak power allowed at the port. PARAMETER Automatic recovery from overload shutdown Automatic recovery from no-load shutdown Cutoff timers accuracy Inrush current Output current operating range Output power available, operating range Off mode current CONDITIONS TOVLREC value, measured from port shutdown (can be modified through control port) TUDLREC value, measured from port shutdown (can be modified through control port) Typical accuracy of Tcut IInrsh Iport Pport Imin1 Imin2 PD power maintenance request drop-out time limit Over load current detection range Over load time limit Turn on rise time TPMDO For t=50 ms, Cload=180 uF max. Continuous operation after startup period. Continuous operation after startup period, at port output. Must disconnect for t greater than TUVL May or may not disconnect for t greater than TUVL Buffer period to handle transitions Time limited to TOVL 400 10 0.57 0 5 300 7.5 MIN. 5 1 10 450 350 15.4 5 10 400 TYP. MAX. s s ms mA mA W mA mA ms UNIT
Icut TOVL Trise
350 50 15
400 75
mA ms us
From 10% to 90% of Vport (specified for PD load consisting of 100 uF capacitor in parallel to 200 ). From Vport to 5 Vdc
Turn off time
Toff
500
ms
Thermal Data
Power consumption - the internal power consumption of a single device from the DC input is based on: Input voltage range............ 44 to 57 VDC Input current..................... 10 mA typ.; 15 mA max.
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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 typ. ; 0.5 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 ] 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
Tcut
OVL_S Ilim Icut
OVL
Ichannel
Port 1 Port 2
UDL_S Imin Port off Tmin
UDL
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].
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PD64012 12-CHANNEL PoE MANAGER Pins Descriptions ______________________________________________
PIN 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. PIN NAME 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 TEST_MODE VPORT_NEG11 AGND PORT_SENSE11 VPORT_NEG10 PORT_SENSE10 VPORT_NEG9 PORT_SENSE9 PORT_SENSE8 VPORT_NEG8 PORT_SENSE7 VPORT_NEG7 PORT_SENSE6 PIN TYPE Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Supply Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Supply Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O DISABLE_PORTS_N Digital input VPORT_NEG6 Analog I/O CS1_N Digital I/O DGND Supply CS0_N Digital I/O MISO Digital I/O MOSI Digital I/O SCK Digital input SCL Digital input SDA Digital I/O RESET_N Digital I/O IREF Analog I/O ASICINI Analog input VCC2p5 Supply I2CINI Analog input QGND Supply ADC2p5 Supply EXT_REG Analog out VPERI Analog out Reserved Digital input VPORT_NEG5 Analog I/O PIN DESCRIPTION Port 0 positive voltage feeding Port 1 positive voltage feeding Port 2 positive voltage feeding Port 3 positive voltage feeding Port 4 positive voltage feeding Port 5 positive voltage feeding Port 6 positive voltage feeding Port 7 positive voltage feeding Port 8 positive voltage feeding Port 9 positive voltage feeding Port 10 positive voltage feeding Port 11 positive voltage feeding Main Voltage supply Charge Pump input, 48V+5V Charge Pump Pulse Output Port negative reference Test Mode Pin (connect to ground) Port 11 negative voltage feeding Analog ground Channel current monitoring Port 10 negative voltage feeding Channel current monitoring Port 9 negative voltage feeding Channel current monitoring Channel current monitoring Port 8 negative voltage feeding Channel current monitoring Port 7 negative voltage feeding Channel current monitoring Disable all ports power (active low) Port 6 negative voltage feeding SPI bus, Chip Select 1 Digital ground SPI bus, Chip Select 0 SPI bus, Master in/slave out SPI bus, Master out/slave in SPI bus, Serial clock I/O I2C bus, Serial Clock Input I2C bus, open drain Active Low Reset I/O Current reference Analog input for ASIC initialization Internal 2.5 V supply (do not use!) Analog input for I2C initialization Quiet analog ground ADC reference (do not use!) External regulation Regulated 3.3 V power source (Connect to ground) Port 5 negative voltage feeding
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PD64012 12-CHANNEL PoE MANAGER
PIN 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. PIN NAME AGND PORT_SENSE5 VPORT_NEG4 PORT_SENSE4 VPORT_NEG3 PORT_SENSE3 PORT_SENSE2 VPORT_NEG2 PORT_SENSE1 VPORT_NEG1 PORT_SENSE0 SENSE_NEG VPORT_NEG0 Reserved PIN TYPE Supply Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O Analog I/O TBD PIN DESCRIPTION Analog ground Channel current monitoring Port 4 negative voltage feeding Channel current monitoring Port 3 negative voltage feeding Channel current monitoring Channel current monitoring Port 2 negative voltage feeding Channel current monitoring Port 1 negative voltage feeding Channel current monitoring Port sense reference Port 0 negative voltage feeding Not connected
Functional Description ________
Operational Modes
The PD64012 supports two main modes of operation, based on two different architectures, as described hereafter. The two modes are: Enhanced mode and Automatic mode. Enhanced mode - in this mode of operation, the PD64012s communicate with the PD63000 PoE MCU (dedicated MCU for Power over Ethernet tasks), through a Serial Parallel Interface (SPI) bus. In this mode, all PD64012s are directly connected to the PD63000 through the SPI, in slave mode. The MCU is used for additional Power over Ethernet features, such as: Legacy PDs detection (including Cisco discovery) Enhanced power management algorithms LED indicators support Port matrix control Communication protocol translator. The switch host CPU communicates with the PD63000, via an isolated I2C or UART bus, as shown in Figure 3. Figure 3: Enhanced Mode
Pull-down resistor
I/O Opto
Host CPU
I2C or UART
MOSI MISO SCK SPI Bus
CS0 CS1 CS2 CS3
PD64012 #00
CS0_N CS1_N
PD63000 PoE MCU
PD64012 #01
CS0_N CS1_N
PD64012 #10
CS0_N CS1_N
PD64012 #11
CS0_N CS1_N
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PD64012 12-CHANNEL PoE MANAGER
Automatic mode - in this mode the PD64012 PoE Managers communicate with the host CPU, through an isolated I2C bus. The PD64012 SPI bus is dedicated for internal communication among PD64012s (for power management), as illustrated in Figure 4. Anyone of the devices (for example, PD64012 #00) may be configured as Master, while the others are Slaves. This Master/Slave configuration only affects the Serial Peripheral Interface (SPI) bus. It is critical that only one of them be set-up as a Master, with the others acting as Slaves, in order to avoid SPI clock and data I/Os contentions.
I/O Opto SDA I2C BUS SDA PD64012 #00 Input Opto SCL SPI BUS
CS[0:1]_N SCK MOSI
HOST CPU SCL
Master MISO
SDA PD64012 #01
Slave
SCK MOSI MISO
SCL
SDA PD64012 #10
Slave
SCK MOSI MISO
SCL
SDA PD64012 #11
Slave
SCK MOSI MISO
SCL
Figure 4: Automatic Mode
Mode Configuration Method
The PoE Manager's configuration is done via the ASIC_INI pin, according to the following table. The ASIC_INI analog signal is converted into a 10-bit register (A/D). Once a hard Reset pulse is detected, the data is latched into an internal mode register. I2C 2 LSB ADDRESS (set internally) 00 01 10 11 00
MODE NAME Enhanced mode Auto mode - Slave 1 Auto mode - Slave 2 Auto mode - Slave 3 Auto mode - Master
ASIC_INI VOLTAGE LEVEL 0.31 to 0.63 V 0.63 to 0.94 V 0.94 to 1.25 V 1.25 to 1.56 V 2.19 to 2.5 V
ASIC_INI INTERNAL A/D REGISTER 001 010 011 100 111
Notes: 2 In the Auto mode - the PD64012 is communicating with the host via I C. In the Enhanced mode - the PD64012 is communicating with the controller via SPI.
Block Diagram Description (see Figure 5)
The PD64002 PoE Manager complies with all requirements of IEEE standard 802.3af-2003, for detection. The device has been designed around two major sections: 1. A common Digital section, that serves all 12 channels 2. Twelve separate and identical channels for driving ports.
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PD64012 12-CHANNEL PoE MANAGER
+ 48V
V M A IN
R eset
V m a in 48+5v
C o m m u n ic a tio n I/O
M IS O MOSI SS SCK
C lo c k O s c illa to r
POR
Pum p Up
V o lta g e R e g u la to r
VPO R TPO S
SPI
SPI
C la s s ific a tio n
AC D AC 8 -b it
Com In te rfa c e
PoL Sequencer
A C D is c o n n e c t G e n e ra to r x12
I2 C
SCL SDA
I2C
R e s is to r L in e D e te c tio n
LD DAC
L in e D e te c tio n x12
Pow er M anagem ent
V p o rt M e a s u re m e n t
V p o rt 1 0 -b it AD C
V p o rt L e v e l S h ifte r
O v e rlo a d / D is c o n n e c t R e c o v e ry
VPORTNEG
C la s s ific a tio n
A C D is c o n n e c t M a c ro
C u rre n t a n d A C V o lta g e M e a s u re m e n t
V m a in -1 7 V
R e a l T im e P ro te c tio n 8 -b it AD C
C hannel R T C o n tro l S ta tu s
O ve rlo a d L o g ic
C u rre n t L im itin g x12
PO RTSENSE
D C D is c o n n e c t L o g ic
D C D is c o n n e c t C o m p a ra to r
S en se R e s is to r
I lim 8 -b it D A C
D ig ita l l D ig ita
I lim R e g
I c la s s R e g
I c la s s 8 -b it D A C
A nn a lo g A a lo g
Figure 5: Internal Block Diagram
Digital Section
Communication I/O The PD64012 incorporates two communication interfaces. When operating in the Enhanced mode, an SPI bus connects the PD63000 MCU to the PD64012s. The second interface is the I2C, used in the Automatic mode (with the host). Both interfaces are used to communicate the contents of internal registers between the PD64012 logic and the MCU. PoE Sequencer This central block of the Digital section includes a combination of internal state machines (macros). It is fed from the Overload/Disconnect Recovery circuit and from the Power Management block. Power Management Receives data from the Vport Measurement block and receives commands and controls from the Communication Interface. This, in order to control the power allocated to the system, as defined by the host. Power Management receives requests to enable ports and decides, by communicating with the Sequencer, whether power is to be allocated. Overload /Disconnect Recovery There is a number of macros which decide on port enable and some on port disconnect. Port enabling: Classification, Resistor Line Detection and Vport Measurement. Port disable: AC Disconnect, DC Disconnect and Overload Logic. These macros are connected to the Channel RT Control Status block. Based on the inputs from these macros, the Channel RT controller starts the shutdown operation or the recovery process. This is done according to preprogrammed parameters for different time windows, as shown in Figure 2, Power Limits.
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PD64012 12-CHANNEL PoE MANAGER
Macros (802.3 Standard) Classification - upon request from the MCU, a state machine applies a regulated 18 V on the port output. The internal current is measured by a metering circuit, compared with a number of preset ranges and in this manner, the classification is established. Line Detection - the MCU generates a request to have four separate voltage levels applied to the output port. A unique measurement circuit monitors the delta between the second and third levels, and between the third and fourth levels. The voltage differences are compared with values stored in registers. By comparing the values, the system can decide whether or not to enable the port. AC Disconnect - the system applies a sinusoidal signal to the positive terminal of the port. The voltage developed on the port terminals is proportional to the value of the load. If the load is high, the AC component riding on the port terminals, will be small and reversed. If the load low, the AC component will be large. A special circuit measures the level of the AC component and compares it with a value stored in a register. Based on the comparison results, the system decides to disable the port or not. DC Disconnect for DC Modulation: senses if the port current falls below 7.5 mA. If so, a flag is raised and timers in the Channel RT Controller are enabled. The Channel RT Controller acts according to pre-programmed limits for thresholds and time windows, prior to initiating a disconnect status for that port. The circuitry takes into account PD's that modulate their current consumption, disconnecting them only if necessary.
Analog Section
Clock Oscillator A 4 MHz oscillator, used for internal logic and timers. Power on Reset (POR) Monitors the internal regulated +3.3 V and generates a Reset signal, if this value drops below 2.8 V. The Reset signal resets the ASIC's logic and generates an output flag to the other PD64012 ASICs, via the RESET_N pin. Charge Pump This circuit block generates a voltage which increases the main input voltage by 10 VDC (approx.). This potential is used to operate the AC Disconnect circuits. Current Limit This circuit continuously checks the current for enabled ports. Once the current exceeds a specific level, the system starts to measure the elapsed time. If this period is greater than a preset threshold, the port is disabled. In all cases, the output current will not exceed a pre-established maximum. Real Time Protection This circuit receives flags from two locations in the PD64012: from the sense resistor and from the main input voltage (48 V). A 10-bit A/D Converter feeds the Digital section, at the Current and AC Voltage Measurement block. From there on, the system handles the levels according to pre-programmed limits. DC Disconnect Comparator Once the port current drops below a set limit, the comparator provides an indication to the DC Disconnect Logic to that effect.
PD-IM-7348 Evaluation Board
The performance features of the PD64012 PoE Manager can be fully appreciated with the PD-IM-7348 Evaluation Board. This board allows to investigate all functions accessible to the designer. The evaluation board supports up to 48 ports, has both I2C and UART interfaces and can demonstrate the Enhanced and Auto modes.
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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_INI VOLTAGE LEVEL 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 I2C_INI INTERNAL A/D REGISTER 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 NOTES General call addresses; not to be used
I2C ADDRESS 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
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PD64012 12-CHANNEL PoE MANAGER Package Information
The PD64012 is housed in a 64-pin plastic package, 10 x 10 x 1.4 mm, meeting JEDEC's MS-026 package outline and dimensions. Exposed pad (for heat-sinking purposes) dimensions are 6.00 by 7.00 mm.
0.2 H A-B D 4 Pls PIN 1 IDENTIFIER
1 64
D
7
49
0.2 C A-B D
0.05
48
(S)
A
B E1
A2
E
L (L1)
R
0.25 GAGE PLANE
VIEW Y
E1/2
16 17 32 33
A1
R1
E/2
Z
VIEW AA
D1/2 D/2 D1 D
SECTION AB - AB
BASE METAL ROTATED 90 CW b1
8
c
c 1
b
PLATING
H
A
Z2 (x4)
VIEW AA
0.08 C
Notes: 1. Dimensions are in millimeters. Interpret dimensions and tolerances per ASME Y14.5m-1994. Datums A, B and D to be determined at datum plane H. Dimensions D and E to be determined at seating plane C. Dimension b does not include dambar protrusion. Allowable dambar protrusion shall not cause the lead width to exceed the maximum b dimension by more than 0.08 mm. Dambar cannot be located on the lower radius or the foot. Minimum space between protrusion and adjacent lead or protrusion 0.07mm. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is 0.25mm per side. D1 and E1 are maximum plastic body size dimensions including mold mismatch. Exact shape of each corner is optional. These dimensions apply to the flat section of the lead between 0.10mm and 0.25mm from the lead tip.
J
C SEATING PLANE
b (x64)
0.08
C A-B D
Z3 (x4)
J
2. 3. 4. 5.
X=A,B or D X
AB AB
e/2
6.
e (x60)
VIEW Y
7. 8.
Dim. A A1 A2 b b1 c c1 D D1 e E E1
Min. --0.05 1.35 0.17 0.17 0.09
Max. 1.60 0.15 1.45 0.27 0.23 0.20
Dim. L L1 R1 R2 S F G Z Z1 Z2 Z3
Min.
Max.
G
0.75 0.45 1.00 REF. --0.08 0.08 0.20 6.00 6.00 0 0 11 11 ----7.00 7.00 7 --13 13
0.16 0.09 12.00 BSC 10.00 BSC 0.50 BSC 12.00 BSC 10.00 BSC
EXPOSED PAD F
VIEW J-J
Figure 6: PD64012 Mechanical Dimensions
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06-0003-058 (Rev. 2.8) / 5 August 2004
12
Information in this document subject to change without prior notice.
(c) PowerDsine 2003
PD64012 12-CHANNEL PoE MANAGER Applications
The PD64012 may be integrated into a number of applications, ranging from daughter boards to full integration into Ethernet switches. Examples of such applications are: Integrated directly in a switch - facilitates the entire PoE concept, by including the ASIC(s) on the main switch PCB. Daughter board add-on - in which the ASIC is integrated into a small PCB for PoE, mounted on top of the switch's main PCB. Midspan units - stand alone devices, installed between the Ethernet switch and powered devices (telephone, camera, wireless LAN, etc..). These Midspan units include the PD64012 ASIC as a PoE control element, to inject power over the communication lines. Figures 7 thru 10 provide detailed schematic diagrams for various applications of the PD64012.
+48VMain
Vport_Pos_1
VPeri
45.3k
100n
Vmain
Vperi
Ex_Reg ADC2P5
Vport_Pos Vport_Neg Vport_Sense
R1
ASIC_INI
2R
Vport_Neg_1
R2
R3
I2C_INI
x12
x12
VPeri
R4
Vport_Pos Vport_Neg Vport_Sense
Vport_Pos_12 Vport_Neg_12
R5 To Opto Couplers
Figure 7 - Single-port Application with AC Disconnect Support
R6
R7
R8
Reset SDA SCL Disable_Ports
Sense_Neg
MOSI
MISO SCK CS_0 CS_1
SPI Communication Bus
VMain 1u 100n
3.3V (VPeri)
4.7u 100n
45.3k
100n
22.6k
Vmain Ref_Port_Neg
Ex_Reg Vperi
CP_In
Vcc2P5
2.5V 100n
ADC2P5 CP_Out 47n IRef
100n
24.9K
Figure 8 - Typical Power Filtering
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06-0003-058 (Rev. 2.8) / 5 August 2004
13
Information in this document subject to change without prior notice.
(c) PowerDsine 2003
PD64012 12-CHANNEL PoE MANAGER
+48VMain 220n VPeri 3.3v Ex_Reg Vmain Vperi 100n 1u ADC2P5 Vport_Pos Vport_Neg Vport_Sense x12 2R Vport_Neg_1 45.3K Vport_Pos_1
R1
I2C_INI ASIC_INI
R2
VPeri
Vport_Pos Vport_Neg Vport_Sense
x12 Vport_Pos_12 Vport_Neg_12
R5
VPeri 3.3v
DGND Reset Disable_Ports_N MOSI MISO SCK CS_1 CS_0
Sense_Neg
Reset Disable_Ports I2C or UART MOSI MISO SCK CS_1_1 CS_1_2 CS_1_3 CS_1_4 MC9S08 DGND
Host CPU
Opto Isolators
DGND
PD-64012 #00
Reset Disable_Ports_N MOSI MISO SCK CS_1 CS_0 PD-64012 #01
(PD-64012 #10) Reset Disable_Ports_N MOSI
R6
MISO SCK CS_1 CS_0 PD-64012 #11
Figure 9 - Enhanced Mode Application
+48VMain
VPeri 3.3v
Vport_Pos_1
220n 45.3K
Vmain
Vperi
Ex_Reg
ADC2P5
Vport_Pos Vport_Neg Vport_Sense
R1
ASIC_INI
2R
Vport_Neg_1
R2
VPeri
R3
I2C_INI
x12
x12
Vport_Pos Vport_Neg Vport_Sense
Sense_Neg
Vport_Pos_12 Vport_Neg_12
R4
R6
R7
R5
R8
Reset
#00 Master
MOSI
MISO SCK CS_0 CS_1
To Opto
SDA SCL Disable_Ports_N
MOSI
Reset SDA SCL Disable_Ports_N
#10 Slave
MISO SCK CS_0 CS_1
MOSI
Reset SDA SCL Disable_Ports_N
#11 Slave
MISO SCK CS_0 CS_1
Figure 10 - Automatic Mode Application
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06-0003-058 (Rev. 2.8) / 5 August 2004
14
Information in this document subject to change without prior notice.
(c) PowerDsine 2003
PD64012 12-CHANNEL PoE MANAGER
Reader Notes
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06-0003-058 (Rev. 2.8) / 5 August 2004
15
Information in this document subject to change without prior notice.
(c) PowerDsine 2003
PD64012 12-CHANNEL PoE MANAGER
Notice
PowerDsine assumes no responsibility or liability arising from the use of this Data Sheet, as described herein, nor does it convey any license under its patent rights or the rights of others. The information contained herein is believed to be accurate and reliable at the time of printing. However, due to ongoing product improvements and revisions, PowerDsine cannot accept responsibility for inadvertent errors, inaccuracies, subsequent changes or omissions of printed material. PowerDsine Ltd. reserves the right to make changes to products and to their specifications as described in this document, at any time, without prior notice. No rights to any PowerDsine Ltd. Intellectual property are licensed to any third party, directly, by implication or by any other method. Covered under one or more of the following patents: 6,643,566; 6,473,608.
________________________________________________________
No Use with Life-Support or Critical Applications _____________________________________________________________________
PowerDsine's products are not designed, intended, or authorized for use as components in systems intended for: (1) (2) surgical implant into the body, or other applications intended to support or sustain life, or any other applications whereby a failure of the PowerDsine's product could create a situation where personal injury, death or damage to persons, systems, data or business may occur. PowerDsine assumes no liability in connection with use in these situations and the disclaimers provided below in this manual shall apply. Should a buyer purchase or use PowerDsine's products for any such unintended use or unauthorized applications, buyer shall indemnify PowerDsine and its officers and employees against any and all claims arising out of or in connection with any claim of personal injury, death or other damage of the type described above, associated with such use.
DISCLAIMERS __________________________________________________________________________________________________
POWERDSINE MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE REGARDING THE SUITABILITY OF THE PRODUCTS CONTAINED HEREIN FOR ANY PARTICULAR PURPOSE, NOR DOES POWERDSINE ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT, AND SPECIFICALLY DISCLAIMS ANY AN ALL LIABILITY, INCLUDING, WITHOUT LIMITATION, CONSEQUENTIAL OR INCIDENTAL DAMAGES. BY USING OUR PRODUCTS USER AGREES NOT TO MAKE ANY CLAIM FOR PUNITIVE DAMAGES. POWERDSINE MAKES NO REPRESENTATION OR WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO THE SUFFICIENCY OR ACCURACY OR UTILITY OF ANY INFORMATION CONTAINED HEREIN. POWERDSINE EXPRESSLY ADVISES THAT ANY USE OF OR RELIANCE UPON SAID INFORMATION IS AT THE RISK OF THE USER AND THAT POWERDSINE SHALL NOT BE LIABLE FOR ANY DAMAGE OR INJURY INCURRED BY ANY PERSON OR ORGANIZATION ARISING OUT OF THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION CONTAINED HEREIN OR IN CONNECTION WITH THE USE OF ANY OF THE PRODUCTS DESCRIBED HEREIN. POWERDSINE IS NOT RESPONSIBLE FOR ANY CHANGES IN THE SPECIFICATIONS OR ERRATA OF THIS PRODUCT. INFORMATION ON THE BASIC PRODUCT CAN BE FOUND AT MOTOROLA'S HOMEPAGE.
Revision History Revision Level / Date 2.3 / 10 Dec. 03 2.4 / 18 Dec. 03 2.41 / 10 Jan. 04 2.5 / 9 Feb. 04 2.6 / 10 Mar. 04 2.7 / 1 Aug. 04 2.8 / 5 Aug. 04 Para. Affected/page Ordering Information/page 1 Mode Configuration Method/page 8 I2C Interface/page 11 Features/page 1 Front & back pages Several Macros/page 8 Analog section/page 9 Pin Configuration/1 Description Lower temperature range deleted. Remains single range only: -20 to +85 C. Deleted extreneous values for ASIC_INI and deleted default Mode value. Deleted primary default value in the table column for Notes. Changed MIB from draft to RFC 3621. Added policy statements and disclaimers. Added temp. of junction-case, under max ratings; added thermal data on page 4; added protection mechanism on page 5. Corrected inacuracies in descriptions. Added part number and associated description.
(c) 2003 PowerDsine Ltd. All rights reserved.
PowerDsine is a registered trademark of PowerDsine LTD. All other products or trademarks are property of their respective owners. The product described by this manual is a licensed product of PowerDsine.
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06-0003-058 (Rev. 2.8) / 5 August 2004
16
Information in this document subject to change without prior notice.
(c) PowerDsine 2003

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