Linear Technology LTC4266A User manual

dc1815afc

DEMO MANUAL DC1815A

Description

LTC4266A

Quad LTPoE++ PSE Controller

Demonstrationcircuit1815AfeaturestheLTC

4266Aquad

power sourcing equipment (PSE) controller, capable of

delivering up to 90W of LTPoE++™ power to a compatible

LTPoE++ powered device (PD). A proprietary detection/

classificationschemeallowsmutualidentificationbetween

an LTPoE++ PSE and LTPoE++ PD while remaining com-

patible and interoperable with existing Type 1 (13W) and

Type2(25.5W)PDs.TheLTC4266Afeaturesetisasuperset

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.

TheLTC4266Aisavailableinmultiple powergrades,allow-

ingdeliveredPDpowerof13W,25.5W,38.7W,52.7W,70W

and 90W. The DC1815A has four variations DC1815A-A,

DC1815A-B, DC1815A-C, and DC1815A-D which accom-

modate the four LTPoE++ power levels (Table 1).

Advanced power management features of the LTC4266A

include: a 14-bit current monitoring ADC, DAC-program-

mable current limit, and versatile quick port shutdown.

Advanced power management host software is available

under a no-cost license. PD discovery uses a proprietary

dualmode4-pointdetectionmechanismensuringexcellent

immunityfrom falsePD detection.The LTC4266Aincludes

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.

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 DC590B QuikEval™

GUI operation.

TheLTC4266AisconfigurableontheDC1815AasanAUTO

pinhigh, MID pin high,autonomous midspan power injec-

tor;input datafrom anexisting networksystem issent out,

along with power

, to a PD. The LTC4266A autonomously

detects a PD, turns power on to the port, and discon-

nects port power without the need for a microcontroller.

OUTnLEDs 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 sup-

ply 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

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

dc1815afc

DEMO MANUAL DC1815A

quick start proceDure

Figure 1. DC1815A Setup

Demonstration circuit 1815A is easy to set up for evaluat-

ing 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 DC590B via ribbon cable to the

DC1814A and via USB to a PC. Open the QuikEval

software for I2C GUI interfacing.

dc1815afc

DEMO MANUAL DC1815A

operation

Introduction

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.

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 recom-

mended 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.

AUTO Pin

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.

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 commu-

nicates 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.

TheLTC4266AhasseparatepinsforSDAINandSDAOUTto

facilitatetheuseofopto-couplers.TheSDAINandSDAOUT

lines are tied together on the DC1815A with a shunt resis-

tor (R10) to provide a traditional bi-directional SDA line.

The 7-bit I2C address of the LTC4266A is 010A3A2A1A0b,

where A3through A0are 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.

Figure 2. DC1815A LDO Circuit for the LTC4266A Digital Supply.

dc1815afc

DEMO MANUAL DC1815A

operation

Board Layout

Proper components placement and board layout with the

LTC4266Aisimportanttoprovideelectricalrobustnessand

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 appro-

priate for the maximum current.

Kelvin sensing is necessary to provide accurate current

readingsparticularlywithDCDisconnect. Thesense resis-

tors 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.

Figure 3. LTC4266A Key Application Components

for Board Placement

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

dc1815afc

DEMO MANUAL DC1815A

operation

When laying out multiple LTC4266A devices, group the

four sets of port MOSFET and sense resistor with their

respectiveLTC4266AasshowninFigure5.EachLTC4266A

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

pcB Layout

Top Silkscreen Layer 1: Top Layer

dc1815afc

DEMO MANUAL DC1815A

pcB Layout

Layer 2: Plane Layer Layer 3: Plane Layer

Layer 4: Bottom Layer Bottom Silkscreen

dc1815afc

DEMO MANUAL DC1815A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 2 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 TESTPOINT, TURRET, 0.094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0

37 4 T1-T4 TRANSFORMER, POE++

(OPTION)

MIDCOM WÜRTH 749022016

COILCRAFT ETH1-460L

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

dc1815afc

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

dc1815afc

DEMO MANUAL DC1815A

schematic Diagram

VEE

( 55V to 57V )

AGND (+)

VEE (-)

MSD

RESET

VDD

CSRN2512FKR250

ADDRESS

100V 100V 100V 100V

AD0

AD1

AD2

AD3

INT

DGND

VDD

SD1

SD2

SD3

SD4

VEE

AGND

INT

AGND

OUT1

OUT2

OUT3

OUT4

MAIN SUPPLY IN

2. INSTALL SHUNTS AS SHOWN.

1. ALL RESISTORS ARE IN OHMS, 0603.

ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTE: UNLESS OTHERWISE SPECIFIED

MPZ2012S102A

FBMH4532HM132-T

ASSEMBLY VERSION -WATT PSE U1

-A 38.7W LTC4266AIUHF-1

-B 52.7W LTC4266AIUHF-2

-C 70W LTC4266AIUHF-3

-D 90W LTC4266AIUHF-4

MPZ2012S102A

FB1 - FB16

_PRODUCTION DILIAN R. 5/4/11

1206 1206 1206

1808

2KV

0805

0805 1206 1206 1206 1206

(-3.3V)

_2a PWR LEVEL UPDATE DILIAN R. 10/5/11

_2b T1-T4 OPTION DILIAN R. 3/28/13

MID

AUTO

SCL

SDAOUT

SCL

SDAIN

OUT4

OUT1

OUT3

OUT2

SCL

SDAIN

SDAOUT

VDD

VEE

VDD

VEE

VDD VDD

SIZE

DATE:

.VER.ONCI

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TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

1 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

1 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

1 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

E6E6

10K

RS3

0.25

RS3

0.25

10K

S7S7

RS2

0.25

RS2

0.25

R13

1.0K

R13

1.0K

C47

0.22uF

X7R

C47

0.22uF

X7R

FDMC86102

JP5

MID

JP5

MID

D10

S1B

D10

S1B

C36

0.22uF

X7R

C36

0.22uF

X7R

AMBER

D27

S1B

D27

S1B

E5E5

C66

1uF

100V

C66

1uF

100V

10uF

100V

10uF

100V

C22

0.22uF

X7R

C22

0.22uF

X7R D9

S1B

AMBER

S3S3

1000pF

J3J3

100K

3.9V

E9E9

R25

4.7K

R25

4.7K

S4S4

S5S5

E8E8

E4E4

E1E1

J2J2

RL1

1.0K

RL1

1.0K

SMAJ58A

D26

S1B

D26

S1B

5.0SMDJ60A

D18

5.0SMDJ60A

D18 D8

S1B

RS1

0.25

RS1

0.25

ZXTP19100CG

5.0SMDJ60A

D20

5.0SMDJ60A

D20

FDMC86102

1000pF

D23

5.6V

D23

5.6V

1 3

C64

1uF

100V

C64

1uF

100V

E3E3

CLD1

CCLM2700

CLD1

CCLM2700

FDMC86102

JP4

AUTO

JP4

AUTO

R10

D24

S1B

D24

S1B

RS4

0.25

RS4

0.25

D25

S1B

D25

S1B

E10E10

D11

S1B

D11

S1B

R14

4.7K

R14

4.7K

C65

0.1uF

C65

0.1uF

FDMC86102

RED

E2E2

S6S6

E7E7

R15

4.7K

R15

4.7K

E14E14

LTC4266AIUHF

VEE

AGND

OUT 4

GATE 4

SENSE 4

SENSE 3

GATE 3

OUT 3

SENSE 2

GATE 2

OUT 2

SENSE 1

GATE 1

OUT 1

VEE

DGND

AD0 7

AD1 6

AD2 5

AD3 4

SCL 38

SDAIN 3

SDAOUT 1

INT37

SD1 14

SD2 15

SD3 16

SD4 17

VDD

AUTO33

MID36

RESET35

MSD34

VEE

S2S2

S1S1

C58

0.22uF

X7R

C58

0.22uF

X7R

dc1815afc

DEMO MANUAL DC1815A

schematic Diagram

DATA IN

POWER AND DATA OUT

DATA IN

CONNECTOR SHIELDING

PORT 1

POWER AND DATA OUT

PORT 2

PORT 3

PORT 4

_PRODUCTION DILIAN R. 5/4/11

_2a PWR LEVEL UPDATE DILIAN R. 10/5/11

_2b T1-T4 OPTION DILIAN R. 3/28/13

T1,T2,T3,T4: WURTH 749022016

COILCRAFT ETH1-460L

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

OUT1

OUT2

OUT3

OUT4

OUT1

OUT2

OUT3

OUT4

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

2 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

2 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Thursday, March 28, 2013

2 3

QUAD PORT LTPoE++ PSE CONTROLLER

DILIAN R.

N/A

LTC4266AIUHF FAMILY

DEMO CIRCUIT 1815A

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

CT5 0.01uF

0805

CT5 0.01uF

0805

FB3FB3

J1-4

RJ45 5569262-1

J1-4

RJ45 5569262-1

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

RT32 75RT32 75

FB13FB13

F12

3A, 1206

C1Q 3

F12

3A, 1206

C1Q 3

CT12 0.01uF

0805

CT12 0.01uF

0805

F10

3A, 1206

C1Q 3

F10

3A, 1206

C1Q 3

RT12 75RT12 75

SHIELD

J1-13

RJ45 5569262-1

SHIELD

J1-13

RJ45 5569262-1

121

122

123

124

125

126

127

128

129

RT23 75

RT8 75RT8 75

RT25 75RT25 75

RT10 75

RT13 75RT13 75

RT1 75RT1 75

CG6

1000pF

2kV

1808

CG6

1000pF

2kV

1808

J1-2

RJ45 5569262-1

J1-2

RJ45 5569262-1

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

FB7FB7

CT2 0.01uF

0805

CT2 0.01uF

0805

CT7 0.01uF

0805

CT7 0.01uF

0805

FB6FB6

FB2FB2

F13

3A, 1206

C1Q 3

F13

3A, 1206

C1Q 3

FB4FB4

RT15 75

3A, 1206

C1Q 3

3A, 1206

C1Q 3

FB11FB11

F15

3A, 1206

C1Q 3

F15

3A, 1206

C1Q 3

FB10FB10

RT21 75

CT14 0.01uF

0805

CT14 0.01uF

0805

RT19 75

RT28 75

CT9 0.01uF

0805

CT9 0.01uF

0805

CG3

1000pF

2kV

1808

CG3

1000pF

2kV

1808

3A, 1206

C1Q 3

3A, 1206

C1Q 3

RT2 75RT2 75

FB14FB14

CT16 0.01uF

0805

CT16 0.01uF

0805

RT5 75RT5 75

CG8

1000pF

2kV

1808

CG8

1000pF

2kV

1808

J1-8

RJ45 5569262-1

J1-8

RJ45 5569262-1

8-1

8-2

8-3

8-4

8-5

8-6

8-7

8-8

3A, 1206

C1Q 3

3A, 1206

C1Q 3

CT11 0.01uF

0805

CT11 0.01uF

0805

F11

3A, 1206

C1Q 3

F11

3A, 1206

C1Q 3

RT31 75

RT22 75

CG4

1000pF

2kV

1808

CG4

1000pF

2kV

1808

T4T4

RT4 75RT4 75

J1-6

RJ45 5569262-1

J1-6

RJ45 5569262-1

6-1

6-2

6-3

6-4

6-5

6-6

6-7

6-8

FB16FB16

3A, 1206

C1Q 3

3A, 1206

C1Q 3

CT1 0.01uF

0805

CT1 0.01uF

0805

J1-5

RJ45 5569262-1

J1-5

RJ45 5569262-1

5-1 41

5-2 42

5-3 43

5-4 44

5-5 45

5-6 46

5-7 47

5-8 48

RT30 75RT30 75

CT3 0.01uF

0805

CT3 0.01uF

0805

J1-7

RJ45 5569262-1

J1-7

RJ45 5569262-1

7-1 61

7-2 62

7-3 63

7-4 64

7-5 65

7-6 66

7-7 67

7-8 68

FB1FB1

CT6 0.01uF

0805

CT6 0.01uF

0805

RT18 75

RT11 75

FB15FB15

3A, 1206

C1Q 3

3A, 1206

C1Q 3

F2 3A, 1206

C1Q 3

F2 3A, 1206

C1Q 3

FB12FB12

RT16 75

RT7 75RT7 75

F14

3A, 1206

C1Q 3

F14

3A, 1206

C1Q 3

CG1

1000pF

2kV

1808

CG1

1000pF

2kV

1808

RT14 75RT14 75

CT8 0.01uF

0805

CT8 0.01uF

0805

RT20 75

F16

3A, 1206

C1Q 3

F16

3A, 1206

C1Q 3

RT29 75

3A, 1206

C1Q 3

3A, 1206

C1Q 3

RT24 75

CG5

1000pF

2kV

1808

CG5

1000pF

2kV

1808

RT9 75RT9 75

RT17 75

CG2

1000pF

2kV

1808

CG2

1000pF

2kV

1808

CT10 0.01uF

0805

CT10 0.01uF

0805

3A, 1206

C1Q 3

3A, 1206

C1Q 3

RT27 75

CG7

1000pF

2kV

1808

CG7

1000pF

2kV

1808

CT13 0.01uF

0805

CT13 0.01uF

0805

J1-3

RJ45 5569262-1

J1-3

RJ45 5569262-1

3-1 21

3-2 22

3-3 23

3-4 24

3-5 25

3-6 26

3-7 27

3-8 28

T2T2

RT26 75

FB9FB9

CT4 0.01uF

0805

CT4 0.01uF

0805

T3T3

223

CT15 0.01uF

0805

CT15 0.01uF

0805

3A, 1206

C1Q 3

3A, 1206

C1Q 3

RT6 75RT6 75

J1-1

RJ45 5569262-1

J1-1

RJ45 5569262-1

1-1 1

1-2 2

1-3 3

1-4 4

1-5 5

1-6 6

1-7 7

1-8 8

FB5FB5

RT3 75RT3 75

FB8FB8

T1T1

223

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