Linear Technology DC1680A Скачать руководство пользователя страница 28

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dc1840afb

DEMO MANUAL DC1840A

Linear Technology  Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417  

(408) 432-1900 

 

FAX

: (408) 434-0507 

 

www.linear.com

 

LINEAR TECHNOLOGY CORPORATION 2011

LT 0314 REV B • PRINTED IN USA

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 applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

Содержание DC1680A

Страница 1: ...is connected to the DC1680A for I2C interfacing with QuikEval This demonstration manual provides a Quick Start Procedure a DC1682A overview a DC1680A L LT LTC LTM Linear Technology and the Linear logo...

Страница 2: ...1 to disable midspan mode 3 Alignpin1ofthe34 pinmaleconnectorontheDC1682A with pin 1 of the 34 pin female connector on the DC1680A Figure2 Pin12ispolarizedtoassistwiththe alignment Carefully push the...

Страница 3: ...3 dc1840afb DEMO MANUAL DC1840A quick start procedure Figure 3 DC1680A Basic Setup Figure 4 System Setup with the DC590 DC1680A DC1682A and 55V Power Supply...

Страница 4: ...power management features in the LTC4270 LTC4271 chipset include per port 12 bit current monitor ing ADCs DAC programmable current limit and versatile quick shutdown of preselected ports PD discovery...

Страница 5: ...across an isolation barrier through a data transformer Figure 6 This eliminates the need for expensive opto couplers All digital pins reside on the digital ground refer ence and are isolated from the...

Страница 6: ...s of theLTC4270 LTC4271chipsetgeneralpurposeinputoutput pins These pins are configured as inputs or outputs via I2C GP1 and GP0 are referenced to DGND and driven by the LTC4271 when set as outputs Fig...

Страница 7: ...Port Protection Ethernet ports can be subject to significant ESD events when long data cables each potentially charged to thou sands of volts are plugged into the low impedance of the RJ45 jack To pr...

Страница 8: ...ports at the 2 6 RJ45 connector J4 on the DC1680A Figure 3 J4 has an integrated Ethernet transformer and common mode termination for each port Test points for port outputs OUT1 through OUT12 are provi...

Страница 9: ...nheldinactivewithallportsoffandallinternalregisters reset to their power up states When SW1 is released RESETispulledhigh andthePSEbeginsnormaloperation PushbuttonswitchSW2whenpressedpullsthemaskable...

Страница 10: ...wer LED Indicators Each PSE port has a green LED indicator to show when PoE power is present at the port The LEDs are driven by the respective port OUT voltage DC1680A System Setup Figure 14 shows a b...

Страница 11: ...11 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Operation Figure 14 DC1680A and DC1682A System Setup with Power Supply DC590 and PD Demo Board...

Страница 12: ...12 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1682A Layout Top Silkscreen Layer 1 Top Layer Layer 2 VEE Plane 1...

Страница 13: ...13 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1682A Layout Layer 3 VEE Plane 2 Layer 4 Bottom Layer Bottom Silkscreen...

Страница 14: ...14 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Top Silkscreen...

Страница 15: ...15 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 1 Top Layer...

Страница 16: ...16 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 2 AGND CGND Plane 1...

Страница 17: ...17 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 3 SIG AGND CGND Plane 2...

Страница 18: ...18 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 4 SIG AGND CGND Plane 3...

Страница 19: ...19 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 5 SIG CGND CGND Plane 4...

Страница 20: ...20 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Layer 6 Bottom Layer...

Страница 21: ...21 dc1840afb DEMO MANUAL DC1840A Demonstration Circuit 1680A Layout Bottom Silkscreen...

Страница 22: ...0 J2 OPT 2 5 0 079 DOUBLE ROW HEADER 13 12 Q1 TO Q12 N CH 100V 7 5A Power 33 FAIRCHILD FDMC3612 14 1 Q13 NPN TRANSISTOR BC846AS SOT 363 DIODES BC846AS 7 15 48 RL1 RK1 RJ1 RI1 RH1 RG1 RF1 RE1 RD1 RC1...

Страница 23: ...SE 0154010 16 17 E1 TO E17 TESTPOINT TURRET 0 061 PBF MILL MAX 2308 2 00 80 00 00 07 0 17 1 J1 CONNECTOR 2mm BOX SOCKET 34 PIN SAMTEC MMS 134 02 T SV 18 0 J2 OPT HEADER POWER 19 1 J3 CONNECTOR SS 7310...

Страница 24: ...5 AAC CR10 102JM 37 0 R22 R23 OPT RES 0805 38 2 SW1 SW2 SWITCH PUSH BOTTOM W RTH 434123050816 39 1 SW3 SWITCH 219 3MST CTS ELECTRIC COMPONENTS 219 3MST 40 10 E18 TO E27 TESTPOINT TURRET 0 094 PBF MILL...

Страница 25: ...IO1 D4 GRN XIO1 1 2 R9 0 R9 0 C24 2 2nF C24 2 2nF R28 560 R28 560 T1 WURTH 7490100143 T1 WURTH 7490100143 TD 1 CT 2 TD 3 N C 4 N C 5 RD 6 CT 3 7 RD 8 RX 9 CT 4 10 RX 11 N C 12 N C 13 TX 14 CT 2 15 TX...

Страница 26: ...ION HISTORY DESCRIPTION DATE APPROVED ECO REV DILIAN R PRODUCTION 3 2 24 11 REVISION HISTORY DESCRIPTION DATE APPROVED ECO REV DILIAN R PRODUCTION 3 2 24 11 REVISION HISTORY DESCRIPTION DATE APPROVED...

Страница 27: ...S1B D17 S1B D14 S1B D14 S1B D9 S1B D9 S1B D10 S1B D10 S1B VC1 J4 14 VC1 J4 14 1 11 133 2 11 134 3 11 135 4 11 136 5 11 137 6 11 138 7 11 139 8 11 140 9 11 141 11 11 143 12 11 144 10 11 142 SHIELD J4 1...

Страница 28: ...NCLUDING 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...

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