1
Rev A
DEMO MANUAL
DC981A/DC981B
DESCRIPTION
LTC4263
Main Board, Single Port
Autonomous PSE/Daughter Card PSE
Demonstration circuits 981A and 981B feature the
LTC
®
4263 in single port Power over Ethernet (PoE) power
sourcing equipment (PSE) midspan and endpoint solu-
tions. The LTC4263 is an autonomous single-channel PSE
controller for use in IEEE802.3af compliant PoE systems.
It includes an onboard planar power MOSFET, internal
inrush, current limit, and short-circuit control, powered
device (PD) detection and classification circuitry, and
selectable AC or DC disconnect sensing. Onboard control
algorithms provide complete PSE control operation without
the need of a microcontroller. The LTC4263 simplifies
PERFORMANCE SUMMARY
QUICK START PROCEDURE
PSE implementation, needing only a single 48V supply
and a small number of passive support components.
Other options shown on the DC981A include legacy PD
detection enable, midspan backoff timer enable, power
class enforce mode, and power management enable. An
LED for each port is driven by the respective LTC4263
to indicate the state of the port. The DC981A is Ethernet
Alliance™ certified.
Design files for this circuit board are available.
Table 1. Typical DC981, Specifications are at TA = 25°C
PARAMETER CONDITION VALUE
Supply Voltage Voltage for IEEE802.3af Compliance at Port Output 46V to 57V
Midspan Mode Detection Backoff Midspan Enabled, Failed Detection 3.2s
Detection Range Valid IEEE802.3af PD Detection 17kΩ to 29.7kΩ
Set Maximum Allocated Power Power Management Enabled, RPM = 12.4kΩ 17W
Ethernet Powered Pairs Pinout Endpoint PSE, Alternative A (MDI)
Midspan PSE, Alternative B 1/2(+), 3/6(–)
4/5(+), 7/8 (–)
Demonstration circuits 981A and 981B are easy to set
up to evaluate the performance of the LTC4263. Refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below.
1. Place jumpers in the following positions:
JP1 EN
JP2 EN
JP3 DIS
JP4 AC
JP5 AC
JP6 EN
2. Insert daughter card (DC981B) to main board
(DC981A) at polarized connector J3.
3. Apply 48V across VDD48 and VSS.
4. Connect a scope probe at VOUT_MD and VOUT_EP
both referenced to positive rail VDD48.
5. Connect a valid PD to either midspan PSE or
endpoint PSE.
6. Connect a second PD to the open port.
All registered trademarks and trademarks are the property of their respective owners.
3
Rev A
DEMO MANUAL
DC981A/DC981B
The DC981 provides two implementations of a PSE con-
trolled by the LTC4263, a midspan PSE and an endpoint
PSE. A single 48V supply is all that is required to power
the board. This in turn provides power to the midspan PSE
and endpoint PSE outputs. On each solution, an LTC4263
provides detection, classification, power management, safe
power on, port current limit, and disconnect detection.
Midspan PSE
In the midspan solution, a legacy device (router, switch,
etc.) that does not have PoE is connected to MIDSPAN
IN. Data is passed through to MIDSPAN OUT along with
PoE which goes out to a PD. Power is applied directly
to Ethernet pairs 4/5 and 7/8. The LTC4263 circuitry is
located in a small layout area behind the RJ45 connec-
tor and switches power on the negative rail. To show the
different functions of the LTC4263, jumpers allow for the
user to select the options of AC or DC disconnect, legacy
detection, midspan backoff timing, and class enforce-
ment. An LED that shows the status of the port is driven
by a switcher in the LTC4263 to improve efficiency when
VDD5 is provided internally. Push button switch SW1 ties
the shutdown pin to ground to disable the LTC4263 in the
midspan solution.
A PSE implementing alternative B pin out must back off
from detection for at least two seconds after a failed at-
tempt. This is to avoid conflict of detection, for example,
should a potential endpoint PSE and midspan PSE be
connected to the same PD. To enable this feature, set JP2
to DIS. JP2 ties the MIDSPAN pin to VDD5 to enable the
LTC4263 backoff timer or to VSS to disable. A 3.2s delay
occurs after every failed detect cycle unless the result is
open circuit. If held at VSS, no delay occurs after failed
detect cycles.
Endpoint PSE
The endpoint solution is primarily shown on a small
daughter card (DC981B). This card is the same height
and width as the integrated RJ45 connector that it slides
behind on the main board (DC981A). The RJ45 includes
Ethernet magnetics and common mode termination. A
layout option shows the same components can be placed
under the same RJ45 connector. The minimum connections
to the daughter card are VSS, VDD48 and VOUT. Power is
switched over from the daughter card out to the Ethernet
data pairs (1/2 and 3/6). A PHY can be connected to the
TO PHY connector to pass data through to the data pairs
along with PoE. LED drive and power management pins
are also brought out for additional board functions. The
board is set up for AC disconnect, but can be reworked
for DC disconnect by removing components and replac-
ing with shorts in certain locations. Tw o solder jumpers
also provide selectable options for legacy detection and
class enforce.
Power Management
The midspan and endpoint PSEs, although separate solu-
tions on the DC981, are tied together at the PWRMGT pin
for demonstration of the LTC4263 power management
capability. Programmable onboard power management
circuitry allows multiple LTC4263s to allocate and share
power in multiport systems, allowing maximum utilization
of the 48V power supply – all without the intervention of
a host processor.
The LTC4263 sources current (IPM) at the PWRMGT pin
proportional to the class of the PD that it is powering. The
voltage of this pin (VPM) is checked before powering the
port (Table 2). The port will not turn on if this pin is more
than 1V above VSS. The PWRMGT pins of the LTC4263s
are tied together and connect to a resistor (RPM) and
capacitor (CPM) in parallel to VSS to implement power
management. This resistor is selected with the following
equation:
RPM = 213kΩ • W/PFULL_LOAD
On the DC981A, the default RPM is 12.4kΩ for a full load
power of 17W.
Table 2. Power Management Voltage
PD CLASS POWER
REQUEST
IPM (TYP) VPM*
Class 1 4W 19μA 236mV
Class 2 7W 33μA 409mV
Class 0, 3, or 4 15.4W 73μA 905mV
*RPM = 12.4kΩ
OPERATING PRINCIPLES
4
Rev A
DEMO MANUAL
DC981A/DC981B
Table 3. Powered Device Combinations
PD COMBINATION 1ST PD 2ND PD
Class 1 / Class 1 Powered Powered
Class 1 / Class 2 Powered Powered
Class 1 / Class 3** Powered Power Denied
Class 2 / Class 2 Powered Powered
Class 2 / Class 3** Powered Power Denied
Class 3 **/ Class 3** Powered Power Denied
**Class 3 substitutable with Class 0 or 4.
If power management is not used, move JP6 to DIS to tie
the PWRMGT pins to VSS and disable this feature.
Class Enforce Mode
ENFORCE CLASS jumper JP1 ties the ENFCLS pin of the
LTC4263 to either VDD5 or VSS to respectively enable or
disable class enforce current limits. If held at VDD5, the
LTC4263 will reduce the ICUT threshold for Class 1 or
Class 2 PDs. If ENFCLS is held at VSS, ICUT remains at
375mA (typical) for all classes.
Table 4. Port Current Limit According to Class
PD CLASS CURRENT THRESHOLD (TYPICAL)
Class 1 100mA
Class 2 175mA
Class 0, 3, 4, or Class
Enforce Disabled 375mA
LED Drive
An LED pin indicates the state of the port controlled by
the LTC4263. When the port is powered, the LED is on;
when disconnected or detecting, the LED is off. If an
invalid signature is detected or a fault occurs, the LED
will flash a pattern that the user or host system can read
to indicate the nature of the problem. When run from a
single 48V supply, the LED pin can operate as a simple
switching current source to reduce power dissipation in
the LED drive circuitry.
VDD5 Option
The logic 5V power supply can be supplied from the internal
LTC4263 5V supply or an external 5V supply when above
the internal supply. If the internal regulator is used, this
pin should only be connected to the bypass capacitor and
to logic pins of the LTC4263 held at VDD5.
AC and DC Disconnect
AC and DC disconnect are two different methods of detect-
ing whether a valid PD is present and requires power. AC
disconnect is the default method for the DC981 but can
be converted to DC disconnect in the midspan solution
through two jumpers. Moving DISCON (JP4) to DC will
short the ACCOUT pin to VSS and configure the LTC4263 to
DC disconnect. Moving jumper setting for ACCOMP (JP5)
to DC bypasses the AC blocking diode and removes the
RC used for AC disconnect from the main circuit.
Legacy Detection
LEGACY jumper JP3 controls whether legacy detect is
enabled. If the LEGACY pin is held at VDD5 (EN selected),
legacy detect is enabled and testing for a large capacitor
is performed to detect the presence of a legacy PD on
the port. If held at VSS (DIS selected), only IEEE 802.3af
compliant PDs are detected. If left floating (no jumper),
the LTC4263 enters force-power-on mode and any PD that
generates between 1V and 10V when biased with 270μA of
detection current will be powered as a legacy device. This
mode is useful if the system uses a differential detection
scheme to detect legacy devices. Warning: Legacy modes
are not IEEE 802.3af compliant.
OPERATING PRINCIPLES
11
Rev A
DEMO MANUAL
DC981A/DC981B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC981A-3 Required Circuit Components
1 1 CPM CAP, X5R, 1µF 16V, 10%, 0603 MURATA, GRM185R61C105KE44D
2 2 C1 CAP, X7R, 0.1µF 16V, 10%, 0603 MURATA, GRM188R71C104KA01D
3 2 C3, C4 CAP, X7R 0.1µF 100V, 10%, 0603 MURATA, GRM188R72A104KA35D
4 1 D1 DIODE, SWITCHING, SOT23 DIODES INC, BAS19-7-F
5 1 D2 DIODE, 58V TVS, SMA-DIODE DIODES INC, SMAJ58A-13
6 1 J4 JACK, POWER, RJ45-JK0-0144BNL PULSE, JK0-0144BNL
7 2 LED3, LED2 LED, GREEN, LED-ROHM, SML-010 ROHM, SML-010FTT86
8 1 L1 IND, PWR, 10000µH, L-COIL-DS1608C COILCRAFT, DS1608C-106MLC
9 1 RPM RES, CHIP 12.4k 1/16W 1%, 0805 VISHAY, CRCW080512K4FKEA
10 1 R1 RES, CHIP 2k 1/10W 5%, 0805 VISHAY, CRCW08052K00FKEA
11 1 R2 RES, CHIP 1k 1/16W 5%, 0603 YAGEO, RC0603FR-071KL
12 1 R3 RES, CHIP 10k 1/16W 5%, 0603 YAGEO, RC0603FR-0710KL
13 1 U1 IC, LTC4263CS, SO14 ANALOG DEVICES, LTC4263CS
Optional Circuit Components
1 1 C2 CAP, X7R 1000PF 2kV, 1206 MURATA, GR431BR7LA102KW01L
2 4 C5, C8, C11, C13 CAP, X7R, 0.1µF 16V, 10%, 0603 MURATA, GRM188R71C104KA01D
3 1 C6 CAP, ELECT, 4.7µF 63V, C-PANA-EEVFK-C PANASONIC, EEE-FK1J4R7R
4 2 C7, C12 CAP, X7R, 0.47µF 100V, 10%, 0805 MURATA, GRM21BR72A474KA73L
5 2 C9, C10 CAP, X7R 0.1µF 100V, 10%, 0603 MURATA, GRM188R72A104KA35D
6 2 D3, D5 DIODE, SHOTTKY, PICO MINI, SOT563 CENTRAL SEMI, CMLSH05-4
7 1 D4 DIODE, 58V TVS, SMA-DIODE DIODES INC, SMAJ58A-13
8 1 D6 DIODE, RECTIFIER 3A, SMB-DIDOE DIODES INC, S3BB-13-F
9 2 D8, D7 DIODE, 15V, ZENER, SOD323 CENTRAL SEMI, CMDZ15L
10 2 J6, J5 CONN, RJ-45 RIGHT ANGLE, RJ45 STEWART CONN SYS, SS-6488-NF-K1
11 1 LED1 LED, YELLOW, LED-ROHM, SML-010 ROHM, SML-010YTT86
12 2 R6, R8 RES, CHIP 1k 1/16W 5%, 0603 YAGEO, RC0603FR-071KL
13 1 R4 RES, CHIP 5.1k 1/16W 5%, 0603 AAC, CR16-512JM
14 2 R5, R7 RES, CHIP 510k 1/16W 5%, 0603 VISHAY, CRCW0603510KJNEA
15 1 SW1 SWITCH, PUSH BUTTON WÜRTH, 434 123 050 816
16 1 J3 SOCKET, 1X6, 0.079", VERTICAL SAMTEC, SQT-106-01-LM-S-004
17 1 U2 IC, LTC4263CDE, DFN14DE ANALOG DEVICES, LTC4263CS
Hardware for Demo Board Only
1 5 E1, E2, E9, E10, E11 TP, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0
2 6 E3, E4, E5, E6, E7, E8 TP, TURRET, 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0
3 6 JP1, JP2, JP3, JP4, JP5, JP6 JMP, 1X3, 0.079" SAMTEC, TMM-103-02-L-S
4 0 JP7 JMP, 2X3, 0.079" OPT
5 6 FOR JP1 TO JP6 (1 and 2) SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
6 2 J1, J2 JACK, BANANA, KEY-575 KEYSTONE, 575-4
7 4 MH1 TO MH4 STANDOFF, SNAP ON, 1/2" KEYSTONE, 8833
12
Rev A
DEMO MANUAL
DC981A/DC981B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC981B Required Circuit Components
1 2 C2, C1 CAP, X7R, 0.1µF 16V, 10%, 0603 MURATA, GRM188R71C104KA01D
2 2 C3, C4 CAP, X7R 0.1µF 100V, 10%, 0603 MURATA, GRM188R72A104KA35D
3 1 C5 CAP, X7R, 0.47µF 100V, 10%, 0805 MURATA, GRM21BR72A474KA73L
4 1 D1 DIODE, 58V TVS, SMA-DIODE DIODES INC, SMAJ58A
5 1 D2 DIODE, SCHOTTKY, PICO MINI, SOT563 CENTRAL SEMI, CMLSH05-4
6 1 J1 HEADER, 1X6, 0.079", SMT, HORIZONTAL SAMTEC, MMT-106-02-S-SH-004
7 1 R1 RES, CHIP 510kΩ 1/16W 5%, 0603 AAC, CR16-514JM
8 1 R2 RES, CHIP 1kΩ 1/16W 5%, 0603 AAC, CR16-102JM
9 1 U1 I.C., LTC4263CDE, DFN14DE ANALOG DEVICES, LTC4263CDE
13
Rev A
DEMO MANUAL
DC981A/DC981B
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
CC
B B
A A
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE 0603.
NOTES: UNLESS OTHERWISE SPECIFIED
2. INSTALL SHUNTS ON JP1-JP6 PINS 1 AND 2.
46V-57V
MIDSPAN
PSE
MIDSPAN OUT MIDSPAN IN
(EXTERNAL 5V SUPPLY OPTIONAL)
+
_
MIDSPAN
ENFCLS
LEGACY
VDD48
VDD48
VDD5
VDD5
VDD5
VDD5
VDD5
PM
VDD48
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 1 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 1 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 1 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION
__ 309-26-14
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION
__ 309-26-14
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION
__ 309-26-14
D6
S3BB
D6
S3BB
2 1
E4
VDD5
E4
VDD5
J2
VSS
J2
VSS
C5
0.1UF
C5
0.1UF
E6PWRMGT
E6PWRMGT
CMDZ15L
15V
D8
CMDZ15L
15V
D8
2 1
SW1
SD
SW1
SD
12
E1
VDD48
E1
VDD48
R2
1K
R2
1K
J1
VDD48
J1
VDD48
C13
0.1UF
C13
0.1UF
JP2
MIDSPAN
EN
DIS
JP2
MIDSPAN
EN
DIS
JP3
LEGACY
EN
DIS
JP3
LEGACY
EN
DIS
JP5
ACCOMP
JP5
ACCOMP
CPM
1UF
CPM
1UF
+
C6
4.7UF
63V
EEVFK1J4R7R
PANASONIC
+
C6
4.7UF
63V
EEVFK1J4R7R
PANASONIC
D3
CMLSH05-4
D3
CMLSH05-4
4
3
1
2
5
6
E2
VSS
E2
VSS
R3
10K
R3
10K
LED2
GRN
MIDPSE
LED2
GRN
MIDPSE
2 1
R5
510K
R5
510K
E9
VOUT_MID
E9
VOUT_MID
J6
SS-6468-NF-K1
RJ45
J6
SS-6468-NF-K1
RJ45
1
2
3
4
5
6
7
8
CHS
CHS
R4
5.1K
R4
5.1K
CMDZ15L
15V
D7
CMDZ15L
15V
D7
2 1
D1
BAS19
D1
BAS19
1 3
L1
10000UH
DS1608C-106
COILCRAFT
L1
10000UH
DS1608C-106
COILCRAFT
12
C4
0.1UF
100V
C4
0.1UF
100V
E8
SD
E8
SD
SMAJ58A
D2
SMAJ58A
D2
2 1
C3
0.1UF
100V
C3
0.1UF
100V
E7LED
E7LED
R6 1KR6 1K
U1
LTC4263CS
U1
LTC4263CS
VSS
5
ACCOUT 8
LED 1
LEGACY
2
MIDSPAN
3
PWRMGT 4
OSC 7
VSS
6OUT 9
OUT 10
VDD48 11
SD
12
ENFCLS
13
VDD5
14
E11
VDD48
E11
VDD48
J5
SS-6468-NF-K1
RJ45
J5
SS-6468-NF-K1
RJ45
1
2
3
4
5
6
7
8
CHS
CHS
RPM
12.4K
0805
1%
RPM
12.4K
0805
1%
JP1
ENFORCE CLASS
EN
DIS
JP1
ENFORCE CLASS
EN
DIS
E3
VSS
E3
VSS
C1
0.1UF
C1
0.1UF
JP4
DISCON
AC
DC
JP4
DISCON
AC
DC
LED1
YELLOW
VDD48
LED1
YELLOW
VDD48
2 1
E5
VSS
E5
VSS
JP6
PWRMGT
EN
DIS
JP6
PWRMGT
EN
DIS
C7
0.47UF
0805
100V
C7
0.47UF
0805
100V
14
Rev A
DEMO MANUAL
DC981A/DC981B
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
CC
B B
A A
ENDPOINT PSE OPTIONS
ENDPOINT PSE
TO PHY
OUT TO PD
TO
DAUGHTER
CARD
OPTIONAL ENDPOINT
PSE LAYOUT
VO-
PM
VDD48
PM
VDD48
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 2 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 2 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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
N/A
LTC4263CS / LTC4263CDE
Friday, September 26, 2014 2 2
MAIN BOARD, SINGLE PORT AUTONOMOUS PSE
KIM T.
DILIAN R.
3
DEMO CIRCUIT 981A
C11
0.1UF
C11
0.1UF R8
1K
R8
1K
C2
1000PF,2KV
1206
C2
1000PF,2KV
1206
R1
2K
0805
R1
2K
0805
R7
510K
R7
510K
C12
0.47UF
0805
100V
C12
0.47UF
0805
100V
C9
0.1UF
0603
100V
C9
0.1UF
0603
100V
D5
CMLSH05-4
D5
CMLSH05-4
4
31
2
5
6
U2
LTC4263CDE
U2
LTC4263CDE
VSS
5
ACCOUT 8
LED 1
LEGACY
2
MIDSPAN
3
PWRMGT 4
OSC 7
VSS
6OUT 9
OUT 10
VDD48 11
SD
12
GND
15
ENFCLS
13
VDD5
14
E10
VOUT_EP
E10
VOUT_EP
1
2
3
4
5
6
7
8
J4
JK0-0044
1
2
3
4
5
6
7
8
J4
JK0-0044
TD+
1
CT
7
TD-
8
RD-
9
VC1+
5
RD+
2
VC1-
10
VC2+
6
VC2-
11
CHS
12
CHS
13
C8
0.1UF
C8
0.1UF
SMAJ58A
D4
SMAJ58A
D4
2 1
JP7
HD2X3-079
OPT
JP7
HD2X3-079
OPT
1
3
5 6
4
2
J3
HD1X6-079
J3
HD1X6-079
VDD48 3
LED 6
PM 5
VO- 2
GND 1
X4
C10
0.1UF
0603
100V
C10
0.1UF
0603
100V
LED3
GRN
ENDPSE
LED3
GRN
ENDPSE
2 1
15
Rev A
DEMO MANUAL
DC981A/DC981B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
16
Rev A
DEMO MANUAL
DC981A/DC981B
ANALOG DEVICES, INC. 2014 - 2018
11/18
www.analog.com
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation
Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to
Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and
agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted
is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third
Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is
NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all
be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of
use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile
or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited
to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS
Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF
LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY
DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS
LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING
BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE
HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States
federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts
(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits
to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
