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LTC4271 Datasheet(PDF) 1 Page - Analog Devices |
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LTC4271 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 30 page  LTC9101-3/LTC9103 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION 8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control The LTC®9101-3/LTC9103 chipset is a 8/16-port power sourcing equipment (PSE) controller and power man- ager designed for use in IEEE 802.3at compliant Power over Ethernet (PoE) systems. The LTC9101-3 manages a user-defined system-level power budget across all ports. Port power is automatically assigned based on system power availability, initial physical classification and after power up, port dynamic power consumption. The LTC9101-3 prioritizes port power by port number (port 1 is highest priority) and automatically removes power from lower priority ports to accommodate higher priority ports. The LTC9101-3 features an interface to control an external serial LED driver. LED indications include Port On, Port Off, Port Power Denied, and Port Fault states. A Supply Overload LED indicates system power usage is near power limit or a port is being denied power. The LTC9101-3 operates without a host present. Configuration is accomplished by pin settings and I2C- based flash programming. The LTC9101-3 autonomously performs compliant 802.3at detection, classification power up, power on, and fault management. APPLICATIONS n Fully Compliant IEEE 802.3at (Type 2) PSE n Up to 16 PSE Ports n Fully Autonomous System-Level Power Manager n No Host Processor Required n System-Level PoE LED Controller n Per-Port Status and Fault LEDs n Supply Overload LED with Hysteresis n eFlash-Programmable System Settings n Port- and System-Level Power Thresholds n LED Mapping and Blink Rate n Port Power Priority n ECC-Protected eFlash and Data RAMs n Very High Reliability Multipoint PD Detection n Lowest Per-Port Power Path Dissipation n 100mΩ Sense Resistance n 57mΩ or Lower MOSFET RDS(ON) n Chipset Isolation Eliminates Isolated 3.3V Supply n Available in a 64-Lead 7mm × 11mm (LTC9103) and 24-Lead 4mm × 4mm (LTC9101-3) QFN Packages n Small Business PoE PSE Switches/Routers All registered trademarks and trademarks are the property of their respective owners. M1 RS1 0.1 0.1µF 0.1µF S1B 1000pF LTC9103 VSSK1 AGND VEE CPA CNA DPA DNA ID0 3.3V VEE LTC9101-3 VDD GND OVR LEGACY RESET SD PC SUPPLY OVERLOAD LED 3.3V CPD CND DPD DND SC SD PC SC DS1 STCP SHCP CFG2 CFG1 CFG0 3.3V POWER MGMT ID1 SENSE1 GATE1 OUT1 VEE VEE 1 2 3 6 4 5 7 8 STCP SHCP DS Q7S GND VCC 3.3V Q0 Q1 A0 A1 Q7 PORT 1 OUTPUT 1 OF 8 PORTS SHOWN PORT 1 LEDs 91013 TA02 2kV ISOLATION G O 1µF 100V 100V * TO SECOND SHIFT REGISTER **REPEAT CONNECTIONS FOR ALL PORT LED’S * ** |
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