DC1682B Datasheet, PDF (2/26 Pages) Linear Dimensions Semiconductor – 12-port Type 2 power sourcing equipment (PSE) composed of a DC1682B daughter card and DC1680A mother board.

DEMO MANUAL DC1840B
Quick Start Procedure
Demonstration kit DC1840B includes the DC1682
daughter card and DC1680 mother board. The kit is set
up for evaluating the LTC4270/LTC4271. Follow the pro-
cedure below and refer to Figures 1 through 4 for proper
equipment setup.
1. On the DC1682 set AUTO jumper JP1 to HI (Figure 1)
to enable AUTO pin mode.
2. On the DC1682 set MID jumper JP2 to LO (Figure 1)
to disable midspan mode.
3. Align pin 1 of the 34-pin male connector on the DC1682
with pin 1 of the 34-pin female connector on the
DC1680 (Figure 2). Pin 12 is polarized to assist with the
alignment. Carefully push the DC1682 straight down
until the two 34-pin connectors are flush with each other.
4. On the DC1680, connect a supply with the positive
rail to POS and negative rail to NEG (Figure 3). Use a
power supply capable of sourcing the maximum load
expected (12 ports × 850mA ≥ 10.2A). Ramp the supply
up to 55V.
5. Connect up to 12 PDs to the DC1680, J4 (Figure 3).
6. The DC590 is optionally connected to the DC1680 con-
nector J5 with a 14-pin ribbon cable (Figure 3). A GUI
for the LTC4270/LTC4271 is brought up by QuikEval for
I²C interfacing from a PC (Figure 4).
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