LTC9101-2A

RECOMMENDED FOR NEW DESIGNS

12/24/48-Port IEEE 802.3at PoE PSE Digital Controller

Part Details

  • Fully Compliant IEEE 802.3at Type 1 and 2 PSE
  • Up to 48 PSE Ports
  • Industry-Standard Register Map
  • +80V/–20V Tolerant Port-Facing Pins
  • ECC-Protected eFlash and Data RAMs
  • Low Power Path Dissipation per Channel
    • 100mΩ Sense Resistance
    • 30mΩ or Lower MOSFET RDS(ON)
  • Chipset Provides Electrical Isolation
    • Eliminates Optos and Isolated 3.3V Supply
  • Very High Reliability Multipoint PD Detection
  • Continuous Per-Port Voltage and Current Monitoring
  • 1MHz I2C Compatible Serial Control Interface
  • Pin or I2C Programmable PD Power
  • Available in 24-Lead 4mm × 4mm (LTC91012A) and 64-Lead 7mm × 11mm (LTC9102) QFN Packages
LTC9101-2A
12/24/48-Port IEEE 802.3at PoE PSE Digital Controller
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Documentation

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Software Resources

Evaluation Software 1

Software Interface Data Sheet and Software

The software interface data sheet for this PSE may be requested from the Software Request Form (SRF). This data sheet describes the I2C interface and programming details for the respective PSE controller.

Reference software for IEEE 802.3bt Semi-auto mode operation is available for this PSE controller and may be requested from the Software Request Form.


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Evaluation Kits

eval board
EVAL-LTC9101-2

Evaluating the LTC9101-2/LTC9101-2A/LTC9101-2B and LTC9102 48-Channel IEEE 802.3at/bt PSE

Product Details

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.

EVAL-LTC9101-2
Evaluating the LTC9101-2/LTC9101-2A/LTC9101-2B and LTC9102 48-Channel IEEE 802.3at/bt PSE

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