LTC4258 - Quad IEEE 802.3af Power Over Ethernet Controller With Integrated Detection

The LTC4258 is a quad 48V Hot SwapTM controller designed for use in IEEE 802.3af compliant Power Sourcing Equipment (PSE). It consists of four independent ports, each with output current limit, short-circuit protection, complete Powered Device (PD) detection and classification capability, and programmable PD disconnect using DC sensing. Used with Power MOSFETs and passives as in Figure 1, the LTC4258 CAN implement a complete IEEE 802.3af-compliant PSE.
The LTC4258 CAN operate autonomously or be controlled by an I2C serial Interface Up to 16 LTC4258s may coexist on the same data bus, allowing up to 64 powered Ethernet ports to be controlled with only two digital lines. Fault conditions are optionally signaled with the INT pin to eliminate software polling.
External Power MOSFETs Current Sense resistors and Diodes allow easy scaling of current and power dissipation levels and provide protection against voltage and current spikes and ESD events.
The LTC4258 is available in a 36-pin SSOP package.
Linear Technology also provides solutions for 802.3af PD applications with the LTC4257 LTC4257-1 and LTC4267.
By Linear Technology Corporation
LTC4258 's PackagesLTC4258 's pdf datasheet
LTC4258CGW SSOP
LTC4258CGW-PBF SSOP
LTC4258CGW-TR SSOP
LTC4258CGW-TRPBF SSOP




LTC4258 Pinout, Pinouts
LTC4258 pinout,Pin out
This is one package pinout of LTC4258,If you need more pinouts please download LTC4258's pdf datasheet.

LTC4258 Application circuits
LTC4258 circuits
This is one application circuit of LTC4258,If you need more circuits,please download LTC4258's pdf datasheet.


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