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PD64001 1-Port PoE Manager Datasheet Preliminary
Introduction ________________
The PD64001 is a single-port Power over Ethernet PSE (Power Source Equipment) Manager. The PSE Manager allows for the detection of IEEE 802.3af2003 and IEEE802.3at/D3.0 powered devices, ensuring safe power feeding and monitoring of Ethernet ports. With a minimum of external components, the PD64001 integrates in a one-port or two- port PoE-port switches and Midspans. The PD64001 has several operating modes, allowing it to be tailored to the customer application, be it a Switch or a Midspan, IEEE802.af or IEEE802.3at/D3.0-compliant, with 1-event or 2events classification, AC or DC disconnect and strict resistor detection or legacy detection capabilities. It operates in a total stand-alone mode, with no need for user intervention. The PD64001 supports 2-events classification and operates at Iport_max currents of up to 720mA per port, making it fully compliant with the IEEE802.3at/D3.0 This datasheet includes a complete application note and provides detailed information and circuitry design guidelines for the implementation of a 1-port Power over Ethernet (PoE) system, based on Microsemi'sTM 1-channel PoE device- the PD64001. This document allows the designer to integrate PoE capabilities, as specified in the IEEE802.3af standard into an Ethernet switch, Midspan or a Router.
Features_____________________
IEEE 802.3af-2003-compliant IEEE802.3at/D3.0 compliant Supports Iport_max of 720mA Programmable solution, can be updated as the IEEE802.3at standard evolves Accurate power measuring and extremely low power dissipation BOM and software tailored for specific application saving total solution cost Minimal power supply stress and EMI noises Legacy (pre-standard) PD's detection 1-port standalone PoE control 1-event and 2-event classification supported External FET and sense resistor AC and DC disconnect Detection of the disconnection method by assembled resistor Port On/Off Host interface Single operating voltage source Direct LED driving including IEEE802.3at indication SOIC-20 package RoHS compliant -40oC to +85oC operating ambient temperature
Ordering Information__________
PART PD64001 TEMP. RANGE -40C to +85C PIN PACKAGE SOIC-20
Applicable Documents__________
IEEE802.3af-2003 IEEE802.3at/D3.0
Evaluation board ordering number - PD-IM-73001
Pin Configuration _____________
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
page
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111
1
PD64001 1-Port PoE Manager Datasheet Preliminary
Main Features Description___________________________________________
Feature Description
PD64001 features
The PD64001 meets all IEEE-802.3af-2003 standard requirements such as: IEEE 802.3af-2003 Compliant IEEE802.3at/D3.0 Compliant Single DC Voltage Input * Multi - point resistor detection * PD classification function * AC disconnect and DC disconnect function * Supports Back-off feature for Midspan implementation Including support for high power and 2-events classification. The PD64001 requires a single DC voltage source: 46V to 57V. No additional voltage sources (e.g. 3.3V/5V) are required for the PoE system's operation. The PD64001 can operate over a wide temperature range: -40c to +85c. Wide temperature range: -40c to +85c Low thermal dissipation (1 sense resistor) External Power FET H/W Disable Port Pre-Standard PD Detection Detection of Cisco Devices LED Support This wide temperature range allows the integration of the PD64001, into small unventilated boxes and operates in harsh environments. The PD64001 has a very low thermal dissipation. The Rsense in PD64001 applications is only 1 to keep the peripheral components in low temperatures as well. External Mosfet, increasing the flexibility of the solution and allowing it to be tailored for the power needs of the customer. The PD64001 utilizes a dedicated pin, allowing an immediate disconnection of the PoE port. This disable-port pin can be controlled via the Host CPU. Enables detection and powering of pre-standard power devices (PDs). Enables detection and powering of all Cisco devices including pre-standard terminals. Direct driving of the LED circuitry. It allows the designer to implement a simple LED circuit, indicating whether an IEEE802.3af or IEEE802.3at device is connected.
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
2
PD64001 1-port PoE Manager Datasheet Preliminary
Maximum Ratings ____________
Vmain......................................................... -0.3 to 60 V xRESETN input voltage............................... -0.5 to 5 V Application circuitry DC current ......................25 mA ESD (Human Body Model)........................... -2V to 2kV(1) Lead temperature (soldering, 10 s)................ 300 C
Notes:. (1) 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 Storage temperature Operational limitations (1)
(1)
MIN. -40 -65 44
NOM.
50
MAX. +85 +150 57
UNIT C C V
In order to get higher power drive at the PSE output ports, it is recommended to use operating voltage source greater then 50v
Electrical Characteristics _________________________________________
DC Characteristics for Digital Inputs and Outputs
PARAMETER Pin Name Type High level input voltage Low level input voltage Input high current Input low current Reset assertion time Internal Pull-up value SYMBOL MIN. MAX. UNIT xRESET Schmitt Trigger CMOS input with internal pull-up VIH 0.9 VCC VCC+0.5V V Vcc = 5V VIL -0.5V 0.2 VCC V Vcc = 5V IIH +1 A IIL +1 A Trst 2.5 S Rpu 30 60 k REMARKS
Dynamic Characteristics
PARAMETER Automatic recovery from overload shutdown Automatic recovery from no-load shutdown 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) MIN. TYP. 8 1 MAX. UNIT s s
Thermal Data______________________________________________________
Microsemi's PD64001 enables building very low power dissipating PoE devices. For a single port, the system worst case power dissipation can be calculated as follows. Application
IEEE802.3af IEEE802.3af IEEE802.3at IEEE802.3at
Copyright (c) 2008 Rev. 0.4 2008-05-08
Disconnection Method
DC AC DC AC
Iport_max Current
350mA 350mA 720mA 720mA
Rsense (1)
0.12W 0.12W 0.52W 0.52W
Diode
0.53W 1.08W
MOSFET
0.012W (0.1) 0.012W (0.1) 0.052W (0.1) 0.052W (0.1)
PoE Manager
0.60W 0.60W 0.60W 0.60W
Total
0.73W 1.26W 0.77W 1.85W
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
3
PD64001 1-Port PoE Manager Datasheet Preliminary
Pin Functionality______________
PIN PIN NAME 1. 2. 3. 4. 5. 6. 7. 8. 9. PIN TYPE PIN DESCRIPTION
LOW_R_DETECT CURRENT_PWM AC_WAVE CLASS_PWM VCC GND LED2 LED1 HIGH_R_DETECT
Digital Output Digital Output Digital Output Digital Output VCC GND Digital Output Digital Output Digital Output Digital Input Digital Output Digital I/O Digital I/O Digital I/O VCC GND Digital Output Digital I/O Digital Input Digital I/O
10. XRESET 11. VMAIN_MEAS 12. PORT_OFF_IMEAS 13. R_DET_MEAS 14. AC_MEAS 15. 16. 17. 18.
AVCC AGND PRE_DET RESERVED1
19. RMODE 20. RESERVED2
Low level resistance detection command Current limit set PWM output AC disconnect output wave Class voltage set PWM output 5V Digital VCC Digital ground LED2 output command LED1 output command High level resistance detection command Reset command from host Vmain measurement command Port Off command/ current measurement input Port voltage measurement input AC disconnect measurement input 5V Analog VCC Analog ground Pre detection command Reserved POE manager mode setup Reserved
The ALT A / ALT B option is selecting between a PSE alternative A or PSE alternative B. For implementing a Midspan PSE use ALT B. The AT option is IEEE802.3at- Compliant in accordance with the IEEE802.3at/D3.0. The CAP option is pre standard Capacitor detection mode.
General Application Description__
The circuit includes the following major interfaces with the Host board: Control A Reset control signal driven by the switch circuitry is used to reset the PoE circuit. This signal should be optically coupled by the Host in order to maintain the requirements for the 1500 Vrms isolation. Power Supply Mains The PoE system operates over a range of 44V to 57V. This power must be isolated from the switch supply and chassis by 1500 Vrms. Grounds There are several grounds used in the system: chassis, digital and analog. The chassis ground is connected to the switch's chassis ground. This ground plane should be 1500Vrms isolated from the PoE circuitry as well as the power supply for the PoE circuitry. The digital and analog grounds are electrically the same ground. However, in order to reduce noise coupling, the grounds are physically separated and connected only at a single point. 5V Regulator A single port application includes a 5V regulator (Vcc) fed by the Vmain through D15, D16 zener diodes and provides up to 25mA which is used to power the CPU and external components in the PoE domain. The D15 and D16 should be selected for the application main voltage as follows: For 44V Vmain < 50V use 16V zener diode. For 50V Vmain 57V use 20V zener diode. If an adequate 5V power source is available, the 5V regulation circuitry can be removed and the zener diodes may be replaced by lower current (5mA) zener diodes but with same voltage requirements.
R Mode Pin_________________
This pin is connected to a resistor voltage divider. It allows the user to choose a combination of three features, as specified in the following table:
R_mode Voltage 0.313 - 0.62 V 0.94- 1.25 V 1.563 - 1.87 V 2.19 - 2. 5 V 2.82- 3.1 V 3.44 - 3.75 V 4.06 - 4.375 V 4.68 - 5 V
ALT A
X X
ALT B
X X
CA P
X X X X
AT
X X X X
X X X X
R26 ()* 1.02K 2.8K 5.23K 8.87K 14.7K 25.5K 54.9K No
* R26 Pull-down's value depends on the actual mode, while for all of the modes, R25 Pull-up's value is 10Kohm.
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
page
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111
4
PD64001 1-port PoE Manager Datasheet Preliminary
Detailed Application Description__
(See Figure 1) The PD64001 performs a multitude of internal operations and PoE functions, requiring a bare minimum of external components. The device is based on Atmel's ATtiny461 MCU. Each PD64001 device handles one port. Figure 1 shows the device with its related components for a 1-port configuration. Mode Configuration - set by the resistor divider (R25/R26) tied in to the RMODE line. The values are fixed for each mode of operation and described in the "R Mode pin" section in this document. Line Detection Circuitry - when performing a line detection procedure, the PoE device utilizes certain voltage levels over the output port. These levels are produced by switched resistor dividers and sensed by the PD64001 in order to confirm a valid PD connection. Current Loop Circuitry - the current is controlled by Q3 MOSFET. The PD64001 supplies PWM signal via pin#2 with a constant duty cycle (depending on the R mode configuration). This PWM signal is filtered and utilized as the current limit circuitry voltage reference. Sense Resistors - for each powered port, two 2-Ohm 2010 (1%) resistors connected in parallel (1-Ohm equivalent) are used in series with the output. In cases where the ambient temperature drops below 700C, or the product does not have to meet 802.3at power, a single 1-Ohm 2010 (1%) resistor is adequate. Classification Circuitry - After a port is investigated, the PD should be classified by a classification current signature. Two voltage levels are set over the port, derived from a reference voltage filtered from PD64001 pin#4 (PWM signal) and sent to an operational amplifier which controls Q3 MOSFET. Output port - The load resistance of the PD attached to the port is presented in parallel with R30. The resulting voltage developed across both resistances is monitored to establish the 802.3af/at compatibility. LED indication - The 1 port application may use the PD64001 LED1 and LED2 pins for system status indications as follows. PD operating Status IEEE802.3af - ON IEEE802.3at - ON IEEE802.3af - OVL/SC IEEE802.3at - OVL/SC Vmain out of range LED1 ON ON Blink at 1Hz Blink at 1Hz Blink at 1Hz LED2 OFF ON OFF Blink at 1Hz OFF
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
5
PD64001 1-port PoE Manager Datasheet Preliminary
V_LDO
Vmain
VPORT_POS CURRENT_PWM 3 + 4 R7 1K PD-0603 2 2 C5 2.2u 10V X7R PD-0805 C6 3.3nF 16V 1 2 X7R PD-0603 R10 1K C8 470p 50V X7R PD-0603 PD-0603 R11 2 PD-2010 R12 2 PD-2010 Vcc V_LDO 2 D5 BAT64 PD-SOT23 8 + 6 4 U1B PD-SO8 7 KA358ADTF_NL C12 1n 50V 1 2 X7R PD-0603 R18 15.4K PD-0603 J2 Vcc Note: Optional Vcc CH81-062V200 NELTRON-2213S-6P N.C R25 10K PD-0603 U3 PB0 PB1 PB2 PB3 VCC GND PB4 PB5 PB6 PB7 PA0 PA1 PA2 PA3 AGND AVCC PA4 PA5 PA6 PA7 ATTINY 461-20SU PD-SOW20 U5 SHORT 20 19 18 17 16 15 14 13 12 11 RMODE PRE_DETECT Vcc R_DET_MEAS_CLASS_OFF PORT_OFF_IMEAS VMAIN_MEAS C21 100n 16V X7R PD-0603 1 2 R26 R MODE PD-0603 Vmain D15 1 CURRENT_PWM 1 AC_WAVE 3 xRESET 5 Vcc 2 4LOW_R_DETECT 6 1 Q3 FQD19N10 PD-DPAK 3 2 1 1 1 2 PD-0603 R29 1.24K PD-0603 2 R6 5.11K 8 1 C4 100n U1A 50V PD-SO8 X7R 1 PD-0805 KA358ADTF_NL APP
D3 GS1G PD-SMA
2
R30 75K PD-0805
C7 100n 100V X7R PD-1206
PORT_OFF_IMEAS
VPORT_NEG
R23 140K PD-0805
R14 215K PD-0805
R31 402K PD-0805
R15 215K PD-0805
VMAIN_MEAS 1
HIGH_R_DETECT 1 Q7 BSS123 PD-SOT23
PRE_DETECT 1 Q5 BSS123 PD-SOT23 2
LOW_R_DETECT
1 Q8 BSS123 PD-SOT23 2
Q6 BSS123 PD-SOT23 2
R_DET_MEAS_CLASS_OFF
3
CLASS_PWM 1 PD-0603 C11 PD-0603 22n 25V X7R PD-0603
2
U2 PD-SO8 MC78L05ABDR2G
1
R20 51.1K
R16 10K
R_DET_MEAS_CLASS_OFF 5
R19 4.87K PD-0805
2
R32 402K PD-0805
C10 1n 50V X7R PD-0603
V_LDO
21
2
8
GND GND#3NC1 GND#6NC2 GND#7
D16
4 5
Note 1
Vcc
Vin
Vout
1
1
2
2 3 6 7
C20 100n 16V X7R PD-0603
1
Note 1 Vmain 44V - 50V 50V - 57V
To be removed in layout
D15, D16 1N4745AP 1N4747AP
REGULATOR
2
2
1
Vcc
LOW_R_DETECT 1 CURRENT_PWM 2 AC_WAVE 3 CLASS_PWM 4 5 6 7 8 HIGH_R_DETECT 9 xRESET 10
1N4745AP DO-41
1N4745AP DO-41
C19 1uF 50V X7R PD-1206
C18 100n 16V X7R PD-0603
Copyright (c) 2008 Rev. 0.4 2008-05-08
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111
1 2 3 3 3
1
Figure 1: One Port Chipset Schematic Diagram
2
3
Microsemi
page
6
PD64001 1-port PoE Manager Datasheet Preliminary
Bill of Materials for a PoE System _____________________________________
Block QTY Reference Description PCB Footprint Manufacturer Manufacturer's Part Number
1 1 1 1 1 2 1 3 1 1 1 2 1
1 port Chipset Circuitry
C4 C5 C6 C7 C8 C10, C12 C11 C18, C20, C21 C19 D3 D5 D15, D16 Q3 Q5, Q6, Q7, Q8 R6 R7 R10 R11, R12 R14, R15 R16, R25 R18 R19 R20 R23 R26 R29 R30 R31, R32 U1 U2 U3
CAP CRM 100nF 50V 10% X7R 0805 SMT CAP CRM 2.2uF 10V 10% X7R 0805 SMT CAP CRM 3.3nF 16V 10% X7R 0603 SMT CAP CRM 100nF 100V 10% X7R 1206 SMT CAP CRM 470pF 50V 10% X7R 0603 SMT CAP CRM 1nF 50V 10% X7R 0603 SMT CAP CRM 22nF 25V 10% X7R 0603 SMT CAP CRM 100nF 16V 10% X7R 0603 SMT CAP CRM 1uF 50V 10% X7R 1206 SMT DIO REC 400V 1A SMA SMT DIO SCHOT 30V 200mA SNGL SOT23 SMT DIODE 16V 1W 5% D041 Insert FET NCH 100V 13A 0.12R DPAK SMT FET NCH 100V 0.15A 6R Logic Level SOT23 RES 5.11K 62.5mW 1% 0603 SMT MTL FLM RES 1K 62.5mW 1% 0603 SMT MTL FLM RES 1K 62.5mW 1% 0603 SMT MTL FLM RES 2R 0.75W 1% 2010 SMT TCK FLM RES 215K 0.125W 0.5% 0805 RES 10K 62.5mW 1% 0603 SMT MTL FLM RES 15.4K 62.5mW 1% 0603 SMT TCK FLM RES 4.87K 125mW 1% 0805 SMT TCK FLM RES 51.1K 62.5mW 1% 0603 SMT MTL FLM RES TCK FLM 140K 1% 125mW 0805 SMT R mode RES 1.24K 62.5mW 1% 0603 SMT TCK FLM RES 75K 125mW 1% 0805 SMT TCK FLM RES 402K 125mW 1% 0805 SMT MTL FLM OP AMP DUAL 32V LOW OFFSET SO8 IC VOLT REG 5V 0.1A 4% SO8 SMT Microcontroller 2K 8-bit SOIC-20 SMT
PD-0805 PD-0805 PD-0603 PD-1206 PD-0603 PD-0603 PD-0603 PD-0603 PD-1206 PD-SMA PD-SOT23 DO-41 PD-DPAK PD-SOT23 PD-0603 PD-0603 PD-0603 PD-2010 PD-0805 PD-0603 PD-0603 PD-0805 PD-0603 PD-0805 PD-0603 PD-0603 PD-0805 PD-0805 PD-SO8 PD-SO8 PD-SOW20
Samsung Samsung TDK Samsung EPCOS EPCOS Rohm EPCOS TDK Pan Jit Infineon Microsemi Fairchild Infineon Samsung Rohm Samsung KOA Yageo Rohm Samsung XXX Samsung Samsung ASJ Rohm Yageo Fairchild ON Semi Microsemi
CL21B104KBAC CL21B225KPFNNNC C1608X7R1C332K CL31B104KCFNNNE B37931-K5471-K60 B37931-K5102-K60 MCH185CN223KK B37931K9104K60 C3216X7R1H105K GS1G BAT64 1N4745AP FQD19N10 BSS123 RC1608F5111CS MCR03EZHEF1001 RC1608F1001CS RK73H2HTTE2R00F RT0805DRD07215K MCR03EZHEFX1002 RC1608F1542CS XXX RC1608F5112CS RC2012F1403CS CR16-1241FL MCR10EZHEF7502 RC0805FRF07402K KA358ADTF_NL MC78L05ABDR2G PD64001
4 1 1 1 2 2 2 1 1 1 1 1 1 1 2 1 1 1
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
7
PD64001 1-port PoE Manager Datasheet Preliminary
Package Information _______________________________________________
Microsemi's PD64001 is housed in a 20-lead, 0.300" Wide, Plastic Gull Wing Small Outline Package (SOIC).
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
8
PD64001 1-port PoE Manager Datasheet Preliminary
Revision History Revision Level / Date 0.1 / 26 November. 07 0.2 / 25 December 07 0.3 / 28 March 08 0.4 / 04 May 08 Para. Affected Introduction schematic diagram Whole document schematic diagram Description Initial Release Introduction, Features and ordering information added Schematic diagram and BOM has been updated General updates Schematic diagram and BOM had been updated
(c) 2008 Microsemi LTD. All rights reserved. Visit our web site at: www.microsemi.com
Catalog Number: 06-0068-058
Copyright (c) 2008 Rev. 0.4 2008-05-08
Microsemi
Analog Mixed Signal Group 1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111 page
9

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