The EVAL-LTC9101-2 is a 48-channel IEEE 802.3at/bt compliant
power sourcing equipment (PSE). The EVAL-LTC9101-2 includes
the DC3159A-C, DC3159A-D, or DC3159A-E daughter
card, the DC3017A-B motherboard, and features the LTC9101-2/
LTC9101-2A/LTC9101-2B and LTC9102 chipset.
In the EVAL-LTC9101-2, the daughter card has a single
LTC9101-2x digital controller, where X denotes either the
LTC9101-2, LTC9101-2A, or the LTC9101-2B. The DC3159A-C
has the LTC9101-2, the DC3159A-D daughter card has the
LTC9101-2A and the DC3159A-E has the LTC9101-2B. The digital
controller interfaces with four LTC9102 (12-channel) analog controllers
for a total of 48 PSE channels.
The LTC9101-2x use a proprietary isolated data interface allowing
the LTC9101-2x digital controller to directly connect to the host controller
I2C interface and eliminating the need for costly optocouplers
and an additional 3.3 V supply.
The EVAL-LTC9101-2 kit connects to up to twenty-four,
802.3af/at/bt PDs directly at each port for 4-pair power evaluation. This kit version can operate autonomously or with host control over
I2C.
The EVAL-LTC9101-2A kit connects to up to forty-eight, 802.3af/at
PDs with an Ethernet splitter for each two ports for 2-pair power
evaluation. This kit version requires host control over I2C.
The EVAL-LTC9101-2B kit connects to up to forty-eight,
802.3af/at/bt PDs with an Ethernet splitter for each two ports for
2-pair power evaluation. This kit version can operate autonomously
or with host control over I2C.
Indicator LEDs quickly show channel status for the 48 power
channels. An optional on-board buck regulator provides 3.3 V from
the VEE supply for the digital circuity. This demonstration manual
provides an EVAL-LTC9101-2 overview and quick start procedure.
Design files for this circuit board are available.
