1
DESCRIPTION
DC1842B and DC1680B
LTC4290B/LTC4271
8-Port PSE with Digital Isolation
Demonstration kit DC1843B is an 8-port IEEE 802.3at
Type 2 power sourcing equipment (PSE) composed of a
DC1842B daughter card and DC1680B motherboard. The
kit is used for evaluation of the
and
chipset. Up to 8 powered devices (PDs) can be connected
and powered from this system using a single power supply.
A DC590 is connected to the DC1843 for I
2
C interfacing
with QuikEval™. This demonstration manual provides a
Quick Start Procedure, a DC1842B overview, a DC1680B
overview, schematics, and layout printouts. Refer to the
Layout Guide for Demonstration Circuit 1842B when
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
BOARD PHOTO
laying out the LTC4290B/LTC4271 circuit. Contact Linear
Technology for this document.
The DC1842B has increased surge protection over the
DC1842A. The DC1680B uses discrete Ethernet transform-
ers while the DC1680A has an integrated 12-port RJ45 jack.
Design files for this circuit board are available at
Summary of Contents for DC1680B
Page 15: ...15 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Top Assembly ...
Page 16: ...16 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 1 Top Layer ...
Page 17: ...17 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 2 AGND CGND Plane 1 ...
Page 21: ...21 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 6 Bottom Layer ...
Page 22: ...22 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Bottom Assembly ...
