LTC9103
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LTC9103

8-Channel IEEE802.3bt (PoE 2) PSE Analog Controller

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $5.14
Features
  • Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
  • Fully Compliant IEEE 802.3at Type 2 PSE
  • Software-Compatible with LTC4291-1/LTC4292
  • Up to 48 PSE Ports with One Power Channel per Port
  • Up to 24 PSE Ports with Two Power Channels per Port
  • 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
    • Connection Check Distinguishes Single-Signature and Dual-Signature PDs
  • Continuous Per-Port Power and Current Monitoring
  • 1MHz I2C Compatible Serial Control Interface
  • Pin or I2C Programmable PD Power
  • Available in 24-Lead 4mm × 4mm (LTC9101‑1) and a 64-Lead 7mm × 11mm (LTC9102/LTC9103) QFN Packages
Additional Details
show more Icon

The LTC9101-1/LTC9102/LTC9103 chipset is a 48-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 2, 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. The LTC9101-1/LTC9102/LTC9103 is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. The LTC9101-1/LTC9102/LTC9103 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.1Ω sense resistance per power channel. A transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply, resulting in significant BOM cost savings.

Advanced power management features include per-port 14‑bit current/power monitoring, programmable current/power limits, and versatile fast shut-down of preselected ports. An advanced power management host software layer is available. PD detection uses a proprietary multipoint detection mechanism ensuring excellent immunity from false PD identification. Autoclass and 5-event physical classification are supported. The LTC9101-1/LTC9102/LTC9103 includes an I2C serial interface operable up to 1MHz. The LTC9101-1/LTC9102/LTC9103 is pin or I2C programmable to negotiate PD delivered power up to 71.3W.

APPLICATIONS

  • PoE PSE Switches/Routers and Midspans
Part Models 2
1ku List Price Starting From $5.14

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC9103AUKJ#PBF
  • HTML
  • HTML
LTC9103AUKJ#TRPBF
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

EVAL-LTC9101-3

Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control

zoom

EVAL-LTC9101-3

Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control

Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control

Product Detail

The EVAL-LTC9101-3 is a 16-channel IEEE 802.3at compliant power sourcing equipment (PSE) with autonomous power management and serial LED driver for port LEDs. The EVAL-LTC9101-3 includes the EVAL-LTC9101-3-AZ daughter card, the EVAL-LTC9101-3-MBAZ motherboard, and features the LTC9101-3 and LTC9103 PSE platform chipset.

In the EVAL-LTC9101-3, a single LTC9101-3 digital controller interfaces with up to two LTC9103, 8-channel, analog controllers for 16 power channels total. Up to sixteen IEEE 802.3af/at/bt powered devices (PDs) can be connected to the EVAL-LTC9101-3 and powered from this system using a single power supply.

The LTC9101-3 and LTC9103 use a proprietary isolated data interface allowing the LTC9101-3 to share the same logic supply as the host controller and eliminate the need for an additional isolated 3.3 V supply. The EVAL-LTC9101-3 operates completely autonomously without a host controller, including flash configuration for power management and port LEDs. Port Status and Fault LEDs quickly show PoE status for up to sixteen ports, including fault codes, driven by the LTC9101-3 using a serial LED driver. A Supply Overload LED warns if system power usage is near the power budget and indicates if port power is denied or revoked.

reference details image

DC3160A

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

zoom

DC3160A

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

Product Detail

Demonstration kit 3160A-KIT is an Ethernet Alliance Gen 2 PoE certified, 24-port IEEE 802.3at/bt-compliant power sourcing equipment (PSE) composed of a DC3159A daughter card (48-channels) and DC3017A motherboard (24, 4-pair ports). The DC3160A-KIT features the LTC9101-1/LTC9102/LTC9103 PSE platform chipset.

In the DC3160A-KIT, a single LTC9101-1 digital controller interfaces with up to four analog controllers. The DC3159A-A daughter card has four LTC9102, 12-channel, analog controllers for 48 power channels total. The DC3159A-B daughter card has two LTC9102, 12-channel, analog controllers and two LTC9103, 8-channel, analog controllers for 40 power channels total. Up to twenty four IEEE 802.3af, IEEE 802.3at, or IEEE 802.3bt powered devices (PDs) can be connected to the DC3160A-KIT and powered from this system using a single power supply.

The LTC9101-1, LTC9102, and LTC9103 use a proprietary isolated data interface allowing the LTC9101-1 to directly connect to the host controller I2C interface and eliminates the need for costly opto-couplers and an additional 3.3V supply. The DC3160A-KIT can operate completely autonomously without a host controller or with a DC590 for I2C interfacing.

Robust surge protection is provided by design and onboard surge protection devices. Indicator LEDs show channel status for up to 48 power channels. An optional on-board buck regulator provides 3.3V from the VEE supply for the digital circuity. This demonstration manual provides an auto mode quick start procedure and DC3160A-KIT overview.

Design files for this circuit board are available.

Recently Viewed