MICROSEMI PD64001

PD64001 1-Port PoE Manager Datasheet
Preliminary
Introduction ________________
Features_____________________
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’s™
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.
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
Ordering Information__________
PART
PD64001
Applicable Documents__________
♦
♦
IEEE802.3af-2003
IEEE802.3at/D3.0
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
TEMP. RANGE
-40°C to +85°C
PIN PACKAGE
SOIC-20
Evaluation board ordering number - PD-IM-73001
Pin Configuration _____________
Copyright © 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
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
• 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
Single DC Voltage Input
(e.g. 3.3V/5V) are required for the PoE system’s operation.
The PD64001 can operate over a wide temperature range: -40°c to +85°c.
Wide temperature range:
-40°c to +85°c
Low thermal dissipation
(1Ω sense resistor)
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
1Ω 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
External Power FET
power needs of the customer.
The PD64001 utilizes a dedicated pin, allowing an immediate disconnection of the PoE port.
H/W Disable Port
This disable-port pin can be controlled via the Host CPU.
Pre-Standard PD
Detection
Enables detection and powering of pre-standard power devices (PDs).
Detection of Cisco
Devices
Enables detection and powering of all Cisco devices including pre-standard terminals.
LED Support
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 © 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 ____________
Notes:.
(1)
ESD testing is performed in accordance with the Human Body
Model (CZap = 100 pF, RZap = 1500 Ω).
Vmain………………………………………………… -0.3 to 60 V
xRESETN input voltage…………………………. -0.5 to 5 V
Application circuitry DC current ….………………25 mA
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.
ESD (Human Body Model)…………….……..… -2V to 2kV(1)
Lead temperature (soldering, 10 s)……………. 300 °C
Operating Conditions ____________________________________________
PARAMETER
Operating temperature
Storage temperature
Operational limitations (1)
(1)
MIN.
-40
-65
44
NOM.
MAX.
+85
+150
57
50
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
μA
IIL
+1
μA
Trst
2.5
μS
Rpu
30
60
kΩ
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.
MAX.
UNIT
8
s
1
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
Disconnection
Method
Iport_max
Current
Rsense
(1Ω)
Diode
MOSFET
PoE
Manager
Total
IEEE802.3af
DC
350mA
0.12W
-
0.012W (0.1Ω)
0.60W
0.73W
IEEE802.3af
AC
350mA
0.12W
0.53W
0.012W (0.1Ω)
0.60W
1.26W
IEEE802.3at
DC
720mA
0.52W
-
0.052W (0.1Ω)
0.60W
0.77W
IEEE802.3at
AC
720mA
0.52W
1.08W
0.052W (0.1Ω)
0.60W
1.85W
Copyright © 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
3
PD64001 1-Port PoE Manager Datasheet
Preliminary
Pin Functionality______________
PIN PIN NAME
PIN TYPE
1.
LOW_R_DETECT
Digital Output
2.
CURRENT_PWM
Digital Output
3.
AC_WAVE
Digital Output
4.
CLASS_PWM
Digital Output
5.
6.
7.
8.
VCC
GND
LED2
LED1
VCC
GND
Digital Output
Digital Output
9.
HIGH_R_DETECT
Digital Output
10. XRESET
Digital Input
11. VMAIN_MEAS
Digital Output
12. PORT_OFF_IMEAS
Digital I/O
13. R_DET_MEAS
Digital I/O
14. AC_MEAS
Digital I/O
15.
16.
17.
18.
AVCC
AGND
PRE_DET
RESERVED1
VCC
GND
Digital Output
Digital I/O
19. RMODE
Digital Input
20. RESERVED2
Digital I/O
PIN DESCRIPTION
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
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
ALT
B
CA
P
AT
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
R26
(Ω)*
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 © 2008
Rev. 0.4 2008-05-08
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.
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
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.
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.
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.
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.
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.
LED indication - The 1 port application may use the
PD64001 LED1 and LED2 pins for system status
indications as follows.
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.
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
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.
Copyright © 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
C5
2.2u
10V
X7R
PD-0805
3
2
C6
3.3nF 16V
1
2
X7R
PD-0603
3
2
Vcc
2
D5
BAT64
PD-SOT23
Q3
FQD19N10
PD-DPAK
PD-0603
R7
1K
C4
100n
U1A
50V
PD-SO8
X7R
1
PD-0805
KA358ADTF_NL APP
V_LDO
+
-
R10
1K
+
U1B
PD-SO8
7
V_LDO
PD-0603
R11
2
PD-2010
6
-
KA358ADTF_NL
R18
15.4K
PD-0603
R23
140K
PD-0805
1
Q5
BSS123
PD-SOT23
R14
215K
PD-0805
D15, D16
1
D3
GS1G
PD-SMA
R31
402K
PD-0805
R30
75K
PD-0805
1
Q6
BSS123
PD-SOT23
VPORT_POS
C7
100n
100V
X7R
PD-1206
VPORT_NEG
R15
215K
PD-0805
Vout
1
Vcc
C10
1n
50V
X7R
PD-0603
REGULATOR
Vin
U2
PD-SO8
MC78L05ABDR2G
R19
4.87K
PD-0805
R_DET_MEAS_CLASS_OFF
8
C19
1uF
50V
X7R
PD-1206
V_LDO
2
1N4745AP
DO-41
D16
Note 1
2 1
1N4745AP
DO-41
D15
LOW_R_DETECT
Vmain
1
Vmain
Q8
BSS123
PD-SOT23
PRE_DETECT
Vcc
2
4LOW_R_DETECT
6
1N4745AP
CH81-062V200
NELTRON-2213S-6P
N.C
J2
HIGH_R_DETECT
CURRENT_PWM
1
AC_WAVE
3
xRESET
5
Q7
BSS123
PD-SOT23
1
VMAIN_MEAS
Vcc
Note: Optional
R25
10K
PD-0603
R26
R MODE
PD-0603
Vmain
1N4747AP
Note 1
44V - 50V
1
2
R6
5.11K
PD-0603
R29
1.24K
PD-0603
C8
470p
50V
X7R
PD-0603
R12
2
PD-2010
C12
1n 50V
1
2
X7R
PD-0603
RMODE
PRE_DETECT
Vcc
R_DET_MEAS_CLASS_OFF
PORT_OFF_IMEAS
VMAIN_MEAS
50V - 57V
1
2
3
2
1
2
8
4
R_DET_MEAS_CLASS_OFF 5
20
19
18
17
16
15
14
13
12
11
3
2
1
C21
100n
16V
X7R
PD-0603
3
2
CURRENT_PWM
Vcc
R16
10K
PA0
PA1
PA2
PA3
AGND
AVCC
PA4
PA5
PA6
PA7
ATTINY 461-20SU
PD-SOW20
PB0
PB1
PB2
PB3
VCC
GND
PB4
PB5
PB6
PB7
U3
C11
PD-0603
22n
25V
X7R
PD-0603
LOW_R_DETECT 1
CURRENT_PWM 2
AC_WAVE
3
CLASS_PWM
4
5
6
7
8
HIGH_R_DETECT 9
xRESET
10
PD-0603
R20
51.1K
R32
402K
PD-0805
PORT_OFF_IMEAS
CLASS_PWM
Vcc
C20
100n
16V
X7R
PD-0603
U5
SHORT
2
1
1
3
1
2
1
2
To be removed in layout
1
2
4
5
GND
GND#3NC1
GND#6NC2
GND#7
2
3
6
7
8
4
3
2
1
2
1
2
C18
100n
16V
X7R
PD-0603
6
page
Analog Mixed Signal Group
1 Hanagar st., P.O/ Box 7220 Hod Hasharon 45421, Israel Tel: +972-9-7755100 Fax: +972-9-7755111
Microsemi
Copyright © 2008
Rev. 0.4 2008-05-08
1
2
1
2
Figure 1: One Port Chipset Schematic Diagram
PD64001 1-port PoE Manager Datasheet
Preliminary
Bill of Materials for a PoE System _____________________________________
Block
QTY
Description
PCB Footprint Manufacturer
Manufacturer's Part
Number
1
1
C4
C5
CAP CRM 100nF 50V 10% X7R 0805 SMT
CAP CRM 2.2uF 10V 10% X7R 0805 SMT
PD-0805
PD-0805
Samsung
Samsung
CL21B104KBAC
CL21B225KPFNNNC
1
C6
CAP CRM 3.3nF 16V 10% X7R 0603 SMT
PD-0603
TDK
C1608X7R1C332K
1
1
2
1
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 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
PD-1206
PD-0603
PD-0603
PD-0603
Samsung
EPCOS
EPCOS
Rohm
CL31B104KCFNNNE
B37931-K5471-K60
B37931-K5102-K60
MCH185CN223KK
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
PD-0603
PD-1206
PD-SMA
PD-SOT23
DO-41
PD-DPAK
EPCOS
TDK
Pan Jit
Infineon
Microsemi
Fairchild
B37931K9104K60
C3216X7R1H105K
GS1G
BAT64
1N4745AP
FQD19N10
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-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
Infineon
Samsung
Rohm
Samsung
KOA
Yageo
Rohm
Samsung
XXX
Samsung
Samsung
BSS123
RC1608F5111CS
MCR03EZHEF1001
RC1608F1001CS
RK73H2HTTE2R00F
RT0805DRD07215K
MCR03EZHEFX1002
RC1608F1542CS
XXX
RC1608F5112CS
RC2012F1403CS
ASJ
Rohm
Yageo
Fairchild
ON Semi
Microsemi
CR16-1241FL
MCR10EZHEF7502
RC0805FRF07402K
KA358ADTF_NL
MC78L05ABDR2G
PD64001
3
1
1
1
2
1
1 port
Chipset
Circuitry
Reference
4
1
1
1
2
2
2
1
1
1
1
1
1
1
2
1
1
1
Copyright © 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 © 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
Para. Affected
Description
0.1 / 26 November. 07
-
Initial Release
0.2 / 25 December 07
Introduction
Introduction, Features and ordering information added
0.3 / 28 March 08
schematic diagram
Schematic diagram and BOM has been updated
0.4 / 04 May 08
Whole document
schematic diagram
General updates
Schematic diagram and BOM had been updated
© 2008 Microsemi LTD.
All rights reserved.
Visit our web site at: www.microsemi.com
Copyright © 2008
Rev. 0.4 2008-05-08
Catalog Number: 06-0068-058
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