DC1815A - Demo Manual

DEMO MANUAL DC1815A
LTC4266A
Quad LTPoE++ PSE Controller
DESCRIPTION
Demonstration circuit 1815A features the LTC®4266A quad
power sourcing equipment (PSE) controller, capable of
delivering up to 90W of LTPoE++™ power to a compatible
LTPoE++ powered device (PD). A proprietary detection/
classification scheme allows mutual identification between
an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and
Type 2 (25.5W) PDs. The LTC4266A feature set is a superset
of the popular LTC4266. These PSE controllers utilize low
RON external MOSFETs and 0.25Ω sense resistors which
are especially important at the LTPoE++ current levels to
maintain the lowest possible heat dissipation.
The LTC4266A is available in multiple power grades, allowing delivered PD power of 13W, 25.5W, 38.7W, 52.7W, 70W
and 90W. The DC1815A has four variations DC1815A-A,
DC1815A-B, DC1815A-C, and DC1815A-D which accommodate the four LTPoE++ power levels (Table 1).
Advanced power management features of the LTC4266A
include: a 14-bit current monitoring ADC, DAC-programmable current limit, and versatile quick port shutdown.
Advanced power management host software is available
under a no-cost license. PD discovery uses a proprietary
dual mode 4-point detection mechanism ensuring excellent
immunity from false PD detection. The LTC4266A includes
an I2C serial interface operable up to 1MHz. Optional
I2C control is accessed on the DC1815A either with test
points or a 14-pin ribbon cable for DC590 QuikEval™ GUI
operation.
The LTC4266A is configurable on the DC1815A as an AUTO
pin high, MID pin high, autonomous midspan power injector; input data from an existing network system is sent out,
along with power, to a PD. The LTC4266A autonomously
detects a PD, turns power on to the port, and disconnects port power without the need for a microcontroller.
OUTn LEDs indicate that port power is present. A single
55V supply is required to power the DC1815A. A simple
LDO regulator circuit on the board powers the digital supply of the LTC4266A. A SHDN pushbutton for each port
shuts down the respective port and disables detection.
Pre-programmed masked shutdown ports are shut down
with the MSD pushbutton. A RESET pushbutton resets the
LTC4266A to its AUTO pin logic state. Ports shut down
with the SHDN or MSD pushbutton must be re-enabled
via I2C or a device reset with the AUTO pin high.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1815A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTPoE++ and QuikEval are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
Table 1. DC1815A Power Levels and Power Supply
DEMO BOARD
PSE CONTROLLER
MAX DELIVERED PD POWER
POWER SUPPLY*
DC1815A-A
LTC4266A-1
38.7W
300W
DC1815A-B
LTC4266A-2
52.7W
300W
DC1815A-C
LTC4266A-3
70W
420W
DC1815A-D
LTC4266A-4
90W
540W
*Recommended DC1815A power supply minimum to avoid drooping in a worst-case scenario with ILIM current at all four ports. Set the voltage between
54.75V to 57V for LTPoE++ compliance
dc1815afd
1
DEMO MANUAL DC1815A
QUICK START PROCEDURE
Demonstration circuit 1815A is easy to set up for evaluating the performance of the LTC4266A. Refer to Figure 1
for proper test equipment setup and follow the procedure
below.
1.Set MID jumper JP5 to LO which disables midspan
mode.
2.Set AUTO jumper JP4 to HI which enables AUTO pin
high mode.
3.Connect a 55V to 57V power supply across AGND (+)
and VEE (–). Size the power supply considering the
maximum power delivered to the PDs.
4.Connect with an Ethernet cable an 802.3at Type 1 or
Type 2, or LTPoE++ compatible PD to one of the four
bottom ports of 2x4, RJ45 connector J1.
5.(Optional) For data tests, connect a PHY with an
Ethernet cable to one of the four top ports of 2x4, RJ45
connector J1.
6.(Optional) Connect a DC590 via ribbon cable to the
DC1814A and via USB to a PC. Open the QuikEval
software for I2C GUI interfacing.
Figure 1. DC1815A Setup
2
dc1815afd
DEMO MANUAL DC1815A
OPERATION
Introduction
AUTO Pin
The DC1815A demonstrates the features and capabilities
of the LTC4266A, a quad controller for LTPoE++ power
sourcing equipment. The DC1815A provides a quick and
simple PSE solution requiring only a VEE supply.
The LTC4266A AUTO pin is set high or low with jumper
JP4 on the DC1815A. With the AUTO pin high after a
device reset or power on, the LTC4266A operates in fully
autonomous mode without the need for a microcontroller.
The LTC4266A will automatically detect, classify, and
power on IEEE 802.3at Type 1, Type 2 and LTPoE++ PDs
up to the power level rating of the LTC4266A version used.
For full control via I2C, the AUTO pin is to be pulled low.
Modification of the AUTO pin jumper requires a device
reset or power cycle.
Supply Voltages
Select a VEE supply with enough power to sustain all four
ports at maximum load. Table 1 shows the maximum
delivered PD power of a single port as well as a recommended VEE power supply minimum to avoid drooping in
a worst-case scenario with ILIM current at all four ports.
The LTC4266A also requires a digital 3.3V supply. The
DC1815A uses a simple LDO regulator circuit to power the
3.3V digital supply from the VEE supply. The LTC4266A
VDD supply is allowed to be within 5V above or below
AGND. On the DC1815A, VDD is tied to AGND and DGND
is a negative voltage below AGND. D1, R5, Q5, R14, R15,
and R25 generate the negative voltage referenced to
AGND (Figure 2). These components are sized to handle
the power required to supply the LTC4266A and LEDs on
the DC1815A. Contact Linear Technology Applications
for 3.3V options.
Endpoint vs Midspan
The LTC4266A can be configured either for endpoint or
midspan operation by setting the MID pin high or low
respectively. This is selected with jumper JP5 on the
DC1815A. The MID pin high state enables a two second
detection back-off timer. The LTC4266A must be reset or
power-cycled for the MID pin to be detected. For proper
midspan operation the AUTO pin must also be high.
I2C Control
The LTC4266A is a slave-only I2C device, and communicates with a host using a standard SMBus/I2C 2-wire
interface. On the DC1815A, a host can be connected to
the SCL and SDA test points. Optionally, a DC590B board
can be connected with a 14-pin ribbon cable to header J6.
The LTC4266A has separate pins for SDAIN and SDAOUT to
facilitate the use of opto-couplers. The SDAIN and SDAOUT
lines are tied together on the DC1815A with a shunt resistor (R10) to provide a traditional bi-directional SDA line.
Figure 2. DC1815A LDO Circuit for the LTC4266A Digital Supply.
The 7-bit I2C address of the LTC4266A is 010A3A2A1A0b,
where A3 through A0 are determined by pins AD3 through
AD0 respectively. On the DC1815A board the state of
these pins are controlled by the quad DIP switch, S1.
All LTC4266 chips also respond to the global address
0110000b regardless of the state of their AD3-AD0 pins.
Interrupts are signaled by the LTC4266A to the host via
the INT pin. A red LED on the DC1815A indicates if the
INT line is being pulled low.
dc1815afd
3
DEMO MANUAL DC1815A
OPERATION
Board Layout
Proper components placement and board layout with the
LTC4266A is important to provide electrical robustness and
correct operation. The following mentioned components,
also shown in Figure 3, must be close to their respective
LTC4266A pins with no other components in between on
the connection path. Place a 0.1µF capacitor (C1) directly
across VDD and DGND. Place a 1µF, 100V capacitor (C4)
and a SMAJ58A TVS (D3) directly across AGND and VEE.
Place the OUT 0.22µF, 100V capacitors (C22, C36, C47,
and C58) directly to their respective OUT pins all going
to an AGND plane.
The power path is from VEE to the sense resistor, to the
MOSFET, and out to the port. Select a trace width appropriate for the maximum current.
Kelvin sensing is necessary to provide accurate current
readings particularly with DC Disconnect. The sense resistors used with the LTC4266A must be 0.25Ω, 1% or better,
and with a power rating that can handle the maximum DC
current passed through them. A dedicated sense trace
from each SENSE pin of the LTC4266A must go directly
to the respective sense resistor solder pad (Figure 4). Do
not connect to a copper area or trace between the sense
resistor and the MOSFET.
The VEE side of the sense resistor must connect to a thick
VEE plane through several large vias. At the LTC4266A,
the VEE pins and exposed pad tie together on the top layer
and connect to the VEE plane as well through its own
multiple large vias. The via size, number of vias, copper
thickness, trace width, and number of layers that connect
VEE between the sense resistors and the LTC4266A VEE
pins must total less than 15mΩ. A 2oz. copper thickness
for the VEE copper plane must be used if there is only a
single VEE plane connecting the LTC4266A VEE pins to
the sense resistors.
The VEE current path from the sense resistors to the
main VEE power supply must be either through a copper
plane, or a thick trace. If a trace is used, it must not pass
under the LTC4266A. Instead the path must go out to VEE
from the sense resistors as shown in Figure 4. The VEE
connection is from the VEE supply to the sense resistors
to the LTC4266A VEE pins and must stay in that order.
Figure 4. LTC4266A VEE Pins and Sense Resistors Connect to a
VEE Inner Layer Plane. A Kelvin Sense Trace from each SENSE
Pin Runs to the Respective Sense Resistor Pad. Connect the VEE
Supply Path to the Sense Resistors First, Then to the LTC4266A
VEE Pins
Figure 3. LTC4266A Key Application Components
for Board Placement
dc1815afd
4
DEMO MANUAL DC1815A
OPERATION
When laying out multiple LTC4266A devices, group the
four sets of port MOSFET and sense resistor with their
respective LTC4266A as shown in Figure 5. Each LTC4266A
has its own copper fill area on the surface that connects
to the VEE plane with multiple large vias. The net effect
is to reduce the layout problem down to 4-port groups;
this arrangement is expandable to any number of ports.
Figure 5. Multiple LTC4266 Layout Strategy
to Reduce Mutual Resistance
Surge Protection
Ethernet ports can be subject to significant cable surge
events. To keep PoE voltages below a safe level and protect
the application against damage, protection components
are required at the main supply, at the LTC4266A supply
pins and at the ports. Refer to DC1815A schematic.
Bulk transient voltage suppression devices and bulk
capacitance are required across the main PoE supply
and should be sized to accommodate system level surge
requirements. Across the LTC4266A AGND pin and VEE
pin are an SMAJ58A, 58V TVS and a 1μF, 100V bypass
capacitor. These components must be placed close to the
LTC4266A pins.
In a high surge environment, a 10Ω, 0805 resistor in series
from supply AGND to the LTC4266A AGND and VDD pin
is recommended as shown in the schematic comments.
The bulk TVS and capacitance remain on the supply side
of this 10Ω resistor. The LTC4266A supply pins local TVS
and capacitance remain at the LTC4266A side of this 10Ω
resistor.
Each port requires a pair of S1B clamp diodes: one from
OUT to supply AGND and one from supply VEE to OUTn.
The diodes at the ports steer harmful surges into the supply
rails where they are absorbed by the surge suppressors
and the VEE bypass capacitance. The layout of these paths
must be low impedance.
PCB LAYOUT
Top Silkscreen
Layer 1: Top Layer
dc1815afd
5
DEMO MANUAL DC1815A
PCB LAYOUT
Layer 2: Plane Layer
Layer 3: Plane Layer
Layer 4: Bottom Layer
Bottom Silkscreen
dc1815afd
6
DEMO MANUAL DC1815A
PARTS LIST
ITEM
QTY
1
2
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
C4, C65
CAP, 0603 0.1µF 10% 25V X7R
TDK C1608X7R1E104K
2
16
CT1-CT16
CAP, 0805 0.01µF 5% 100V X7R
AVX 0805C103JAT2A
3
2
C64, C66
CAP, 0805 1µF 10% 100V X7S
TDK C2012X7S2A105K
4
1
C2
CAP, 10uF 20% 100V ALUM.
PANASONIC EEE-2AA100UP
5
4
C22, C36, C47, C58
CAP, 1206 0.22µF 5% 100V X7R
AVX 12061C224JAT2A
6
10
C5, C6, CG1-CG8
CAP, 1808 1000pF 10% 2KV X7R
TDK C4520X7R3D102K
7
2
J2, J3
CONN, JACK, BANANA
KEYSTONE 575-4
8
1
J1
CONN, RJ45, 8-PORT DUAL ROW SHIELDED
TE CONNECTIVITY, 5569262-1
9
1
CLD1
DIODE, CURRENT LIMITING, 2.7mA, SOD-80
CENTRAL SEMI CCLM2700
10
8
D8-D11, D24-D27
DIODE, RECTIFIER, 100V 1A, SMA
FAIRCHILD S1B
11
1
D3
DIODE, TVS, 400W, 58V, SMA
DIODES INC. SMAJ58A
12
2
D18, D20
DIODE, TVS, 5000W, 60V, SMC
LITTLEFUSE 5.0SMDJ60A
13
1
D1
DIODE, ZENER 3.9V SOD-123
ON SEMI, MMSZ4686T1G
14
1
D23
DIODE, ZENER, 5.6V, SOT23
FAIRCHILD, BZX84C5V6
15
1
J6
HEADER, 2 × 7 2mm
MOLEX 87831-1420
16
2
JP4, JP5
HEADER, 3-PIN, 2mm
SAMTEC TMM-103-02-L-S
17
1
U3
IC, 24LC025, EEPROM, TSSOP
MICROCHIP 24LC025-I/ST
18
2
D5, D7
LED, AMBER
ROHM SML-010DTT86L
19
4
D12-D15
LED, GREEN
ROHM SML-010FTT86L
20
1
D6
LED, RED
ROHM SML-010VTT86L
21
16
F-1-F16
FUSE, 3A, 63VDC 1206
BEL FUSE C1Q3
22
1
R9
RES, 0603 1Ω 5% 1/10W
VISHAY CRCW06031R00JNEA
23
1
R10
RES, 0603 10Ω 5% 1/10W
VISHAY CRCW060310R0JNEA
24
1
R5
RES, 0603 100k 5% 1/10W
VISHAY CRCW0603100KJNEA
25
2
R1, R2
RES, 0603 10k 5% 1/10W
VISHAY CRCW060310K0JNEA
26
6
R8, R13, R18, R21, R24, RL1
RES, 0603 1.0k 5% 1/10W
VISHAY CRCW06031K00JNEA
27
4
R7, R17, R20, R23
RES, 0603 10M 5% 1/10W
VISHAY CRCW060310M0JNEA
28
4
R6, R16, R19, R22
RES, 0603 2M 5% 1/10W
VISHAY CRCW0603910KJNEA
29
3
REP3-REP5
RES, 0603 5.1k 5% 1/10W
VISHAY CRCW06035K10JNEA
30
32
RT1-RT32
RES, 0603 75Ω 5% 1/10W
VISHAY CRCW060375R0JNEA
31
3
R14, R15, R25
RES, 1206 4.7k 5% 1/4W
VISHAY CRCW12064K70JNEA
32
4
RS1-RS4
RES, 2512, 0.25Ω 1% 2W
STACKPOLE, CSRN2512FKR250
33
4
MH1-MH4
STAND-OFF, NYLON 0.75"
KEYSTONE, 8834(SNAP ON)
34
1
S1
SWITCH, DIP 4-POSITION
TYCO/ALCOSWITCH ADE04
35
6
S2-S7
SWITCH, MOMENTARY
WÜRTH 434 123 050 816
36
16
E1-E16
4
T1-T4
TESTPOINT, TURRET, 0.094" PBF
TRANSFORMER, POE++
(OPTION)
MILL-MAX, 2501-2-00-80-00-00-07-0
37
38
4
Q9-Q12
XSTR, MOSFET P-CHANNEL 30V (D-S), SOT-23
VISHAY Si2343DS
39
4
Q1-Q4
XSTR, MOSFET, N-CHANNEL 100V
FAIRCHILD FDMC86102
40
1
Q5
XSTR, PNP, 100V, SOT223
ZETEX ZXTP19100CG
MIDCOM WÜRTH 749022016
COILCRAFT ETH1-460L
dc1815afd
7
DEMO MANUAL DC1815A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
41
3
XJP4, XJP5
SHUNT, 2mm
SAMTEC 2SN-BK-G
42
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1815A-2
43
2
STENCIL TOP & BOTTOM
DC1815A-2
DC1815A-A
1
1
DC1815A
GENERAL BOM
2
16
FB1-FB16
FERRITE BEAD, 1k, 0805
TDK MPZ2012S102A
3
1
U1
IC, LTC4274A-1, QUAD PORT 38.7W PSE CONTROLLER
LINEAR LTC4274AIUHF-1
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1815A
DC1815A-B
1
1
DC1815A
GENERAL BOM
2
16
FB1-FB16
FERRITE BEAD, 1k, 0805
TDK MPZ2012S102A
3
1
U1
IC, LTC4266A-2 QUAD PORT 52.7W PSE CONTROLLER
LINEAR LTC4266AIUHF-2
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1815A
DC1815A-C
1
1
DC1815A
GENERAL BOM
2
16
FB1-FB16
FERRITE BEAD, 1k, 0805
TDK MPZ2012S102A
3
1
U1
IC, LTC4266A-3, QUAD PORT 70W PSE CONTROLLER
LINEAR LTC4266AIUHF-3
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1815A
DC1815A-D
1
1
DC1815A
GENERAL BOM
2
16
FB1-FB16
FERRITE BEAD, 1300Ω, 1812
TAIYO YUDEN FBMH4532HM132-T
3
1
U1
IC, LTC4266A-4, QUAD PORT 90W PSE CONTROLLER
LINEAR LTC4266AIUHF-4
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1815A
dc1815afd
8
A
B
C
D
E1
VEE
J3
E2
5.0SMDJ60A
D20
J2
D18
5.0SMDJ60A
70W
90W
-C
-D
5
38.7W
52.7W
-B
-WATT PSE
-A
ASSEMBLY VERSION
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
CLD1
C2
10uF
100V
U1
LTC4266AIUHF-4
LTC4266AIUHF-3
LTC4266AIUHF-2
LTC4266AIUHF-1
VEE
CCLM2700
+
D5
VEE
AMBER
NOTE: UNLESS OTHERWISE SPECIFIED
VEE (-)
( 55V to 57V )
MAIN SUPPLY IN
AGND (+)
AGND
SDAOUT
SDAIN
FOR HIGH SURGE ENVIRONMENTS
ADD A 10 OHM, 0805 RESISTOR SCL
AT THIS LOCATION
C6
C5
R15
4.7K
1206
E9
Q5
VDD
R14
4.7K
1206
4
R25
4.7K
1206
ZXTP19100CG
FBMH4532HM132-T
MPZ2012S102A
MPZ2012S102A
R13
1.0K
D7
VDD
AMBER
R9
1
E10
MPZ2012S102A
FB1 - FB16
1808
2KV
1000pF
1808
2KV
1000pF
R5
100K
C66
1uF
100V
0805
VDD
DGND
(-3.3V)
3.9V
D1
SDAOUT
SDAIN
SCL
R1
10K
VDD
D23
5.6V
C65
0.1uF
R2
10K
10
13
E14
D3
SMAJ58A
100V
0805
C64
1uF
DGND
VDD
10
R10
INT
VDD
INT
RED
D6
RL1
1.0K
SCL
VDD
3
1
1
4
AGND
18
3
SDAOUT
38
37
INT
SCL
SDAIN
VEE
RS1
0.25
RS2
0.25
FDMC86102
Q1
3
14
3
CSRN2512FKR250
CSRN2512FKR250
25
VEE
26
VEE
39
4
5
6
7
AD3
AD2
AD1
AD0
SENSE 1
30
GATE 1
31
OUT 1
32
15
SD1
27
16
SD2
SENSE 2
17
SD3
GATE 2
AD0
AD1
AD2
AD3
Q2
AUTO
1
2
3
4
S1
8
7
6
5
ADDRESS
HI
LTC4266AIUHF
U1
LO
RS4
0.25
FDMC86102
Q3
S5
S4
S3
S2
D8
S1B
S7
MSD
C22
0.22uF
X7R
100V
1206
VEE
D24
S1B
RESET
S6
VDD
3
2
1
LO
HI
C36
0.22uF
X7R
100V
1206
2
JK
SCALE = NONE
DILIAN R.
3
2
1
DATE:
N/A
SIZE
PRODUCTION
TM
TECHNOLOGY
APPROVED
AGND
OUT4
OUT4
OUT3
OUT3
OUT2
OUT2
OUT1
OUT1
AGND
DILIAN R.
DILIAN R.
DILIAN R.
DILIAN R.
DATE
5/4/11
12/8/15
3/28/13
10/5/11
1
DEMO CIRCUIT 1815A
LTC4266AIUHF FAMILY
SHEET 1
PSE CONTROLLER
2
OF 3
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
E7
E6
E5
E4
E3
C58
0.22uF
X7R
100V
1206
E8
VEE
D27
S1B
D11
S1B
SURGE RESISTOR
T1-T4 OPTION
PWR LEVEL UPDATE
Tuesday, December 08, 2015
IC NO.
1
DESCRIPTION
REVISION HISTORY
QUAD PORT LTPoE++
TITLE: SCHEMATIC
VEE
D26
S1B
C47
0.22uF
X7R
100V
1206
LO
2b
2c
_
_
HI
2
2a
_
_
REV
ECO
MID
JP5
D10
S1B
VDD
APPROVALS
VEE
D25
S1B
D9
S1B
AUTO
JP4
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
FDMC86102
Q4
SD4
SD3
SD2
SD1
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CSRN2512FKR250
CSRN2512FKR250
RS3
0.25
FDMC86102
28
SD4
MID
MID
33
22
OUT 2
29
AUTO
SENSE 3
35
RESET
36
GATE 3
23
OUT 3
24
SENSE 4
19
MSD
34
GATE 4
20
OUT 4
21
5
A
B
C
D
DEMO MANUAL DC1815A
SCHEMATIC DIAGRAM
dc1815afd
9
10
A
B
C
D
5
6
7
8
1
2
3
4
3-5
3-6
3-7
3-8
3-1
3-2
3-3
3-4
J1-3
DATA IN
RJ45 5569262-1
5-5
5-6
5-7
5-8
5-1
5-2
5-3
5-4
J1-5
DATA IN
45
46
47
48
41
42
43
44
25
26
27
28
21
22
23
24
RJ45 5569262-1
DATA IN
RJ45 5569262-1
1-5
1-6
1-7
1-8
J1-1
1-1
1-2
1-3
1-4
5
CG5
1000pF
2kV
1808
CG3
1000pF
2kV
1808
CG1
1000pF
2kV
1808
5
T1
OUT1
F1
C1Q 3
OUT2
F5
C1Q 3
75
75
RT20
75
T3
OUT3
F9
C1Q 3
OUT3
F12
C1Q 3
F11
C1Q 3
FB9
FB11
3A, 1206
3A, 1206
3A, 1206
FB10
3A, 1206
3A, 1206
23
F10
C1Q 3
24
22
3
2
20
1
21
19
6
5
17
8
4
18
7
16
14
9
15
13
11
12
FB7
3A, 1206
3A, 1206
3A, 1206
F8
C1Q 3
F7
C1Q 3
OUT2
F6
C1Q 3
FB6
3A, 1206
FB5
75 10
RT19
RT18
RT17
13
12
14
11
15
16
9
75 10
18
7
RT12
17
19
8
21
6
20
4
5
75
75
22
3
23
FB3
FB2
3A, 1206
3A, 1206
24
T2
FB1
1
2
F4
C1Q 3
F3
C1Q 3
OUT1
F2
C1Q 3
23
3A, 1206
24
22
3
2
20
5
1
21
4
19
17
8
6
18
7
RT11
RT10
75
75
RT4
RT9
75
16
9
14
75
11
13
15
12
75 10
RT3
RT2
RT1
4
4
FB12
RT24
RT23
RT22
RT21
FB8
RT16
RT15
RT14
RT13
FB4
RT8
RT7
RT6
RT5
75 CT12 0.01uF
0805
75 CT11 0.01uF
0805
75 CT10 0.01uF
0805
75 CT9 0.01uF
0805
75 CT8 0.01uF
0805
75 CT7 0.01uF
0805
75 CT6 0.01uF
0805
75 CT5 0.01uF
0805
75 CT4 0.01uF
0805
75 CT3 0.01uF
0805
75 CT2 0.01uF
0805
75 CT1 0.01uF
0805
CG6
1000pF
2kV
1808
CG4
1000pF
2kV
1808
CG2
1000pF
2kV
1808
2-5
2-6
2-7
2-8
2-1
2-2
2-3
2-4
PORT 1
3
4-5
4-6
4-7
4-8
4-1
4-2
4-3
4-4
J1-4
PORT 2
DATA IN
6-5
6-6
6-7
6-8
6-1
6-2
6-3
6-4
J1-6
PORT 3
3
POWER AND DATA OUT
RJ45 5569262-1
55
56
57
58
51
52
53
54
POWER AND DATA OUT
RJ45 5569262-1
35
36
37
38
31
32
33
34
7-5
7-6
7-7
7-8
7-1
7-2
7-3
7-4
J1-7
RJ45 5569262-1
POWER AND DATA OUT
RJ45 5569262-1
15
16
17
18
11
12
13
14
J1-2
65
66
67
68
61
62
63
64
CG7
1000pF
2kV
1808
OUT4
SHIELD
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
RJ45 5569262-1
S1
S2
S3
S4
S5
S6
S7
S8
S9
J1-13
75 CT16 0.01uF
0805
75 CT15 0.01uF
0805
75 CT14 0.01uF
0805
75 CT13 0.01uF
0805
2c
2b
_
_
2
2a
_
_
REV
ECO
1
JK
SCALE = NONE
DILIAN R.
DATE:
N/A
SIZE
TECHNOLOGY
8-5
8-6
8-7
8-8
8-1
8-2
8-3
8-4
J1-8
3/28/13
PORT 4
12/8/15
POWER AND DATA OUT
TM
PSE CONTROLLER
1
DEMO CIRCUIT 1815A
SHEET 2
LTC4266AIUHF FAMILY
Tuesday, December 08, 2015
IC NO.
QUAD PORT LTPoE++
TITLE: SCHEMATIC
DILIAN R.
DILIAN R.
DATE
5/4/11
10/5/11
2
OF 3
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
NOTE: FOR TEMPERATURE SENSITIVE 90W
APPLICATIONS, TWO OF THE 749012013 MAY BE
USED AS AN ALTERNATE TO EACH T1, T2, T3, and T4
WHICH HAS A HIGHER CURRENT RATING
APPROVED
DILIAN R.
DILIAN R.
RJ45 5569262-1
75
76
77
78
71
72
73
74
SURGE RESISTOR
T1-T4 OPTION
PWR LEVEL UPDATE
PRODUCTION
DESCRIPTION
REVISION HISTORY
CG8
1000pF
2kV
1808
T1,T2,T3,T4: WURTH 749022016
COILCRAFT ETH1-460L
FB16
RT32
RT31
RT30
RT29
APPROVALS
3A, 1206
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
121
122
123
124
125
126
127
128
129
FB15
FB14
3A, 1206
3A, 1206
3A, 1206
F16
C1Q 3
F15
C1Q 3
OUT4
F14
C1Q 3
13
12
FB13
15
75 10
F13
C1Q 3
14
18
17
19
21
20
22
24
23
16
T4
9
7
8
6
4
5
3
1
2
11
75
75
75
CONNECTOR SHIELDING
RT28
RT27
RT26
RT25
2
A
B
C
D
DEMO MANUAL DC1815A
SCHEMATIC DIAGRAM
dc1815afd
A
B
C
R7
10M
R6
910K
1
3
2
R16
910K
5
R17
10M
REP5
5.1K
D12
OUT1
GRN
R8
1.0K
Q9
Si2343DS
VDD
1
REP4
5.1K
OUT2
D
OUT1
VDD
D13
OUT2
GRN
R18
1.0K
R20
10M
Q10
Si2343DS
R19
910K
1
R23
10M
J6
14
13
A1
A2
VSS
SCL
SDA
TP29
A0
24LC025
WP
4
3
2
1
12
C4 0.1uF
10
9
11
8
6
5
7
4
2
3
1
VCC
WP
5
6
7
8
U3
D14
OUT3
GRN
R21
1.0K
Q11
Si2343DS
1
VDD
R22
910K
TO DC590
3
2
VDD
QUICKEVAL FOR DEMO ONLY
REP3
5.1K
OPTIONAL LED DRIVE
3
2
VDD
VDD
OUT3
VDD
OUT4
5
SDAOUT
SDAIN
SCL
3
2
4
D15
OUT4
GRN
R24
1.0K
Q12
Si2343DS
VDD
4
DGND
E15
E13
E12
E11
DGND
E16
MH4
MH3
MH2
MH1
SDAOUT
SDAIN
SCL
1
1
1
1
MOUNTING HOLES
SDAOUT
SDAIN
SCL
1
1
MH5
MH6
3
3
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
SCALE = NONE
DILIAN R.
JK
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
2
2b
2c
_
_
DATE:
N/A
SIZE
PRODUCTION
TM
TECHNOLOGY
APPROVED
DILIAN R.
DILIAN R.
DILIAN R.
DILIAN R.
DATE
5/4/11
12/8/15
3/28/13
10/5/11
1
DEMO CIRCUIT 1815A
SHEET 3
LTC4266AIUHF FAMILY
PSE CONTROLLER
2
OF 3
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
SURGE RESISTOR
T1-T4 OPTION
PWR LEVEL UPDATE
Tuesday, December 08, 2015
IC NO.
1
DESCRIPTION
REVISION HISTORY
QUAD PORT LTPoE++
TITLE: SCHEMATIC
2
2a
_
_
REV
ECO
A
B
C
D
DEMO MANUAL DC1815A
SCHEMATIC DIAGRAM
dc1815afd
11
DEMO MANUAL
DC1815A
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1815afd
12 Linear Technology Corporation
LT 0116 REV D • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2011
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