bcm59105 Broadcom Corp., bcm59105 Datasheet

bcm59105

Manufacturer Part Number

bcm59105

Description

Quad Integrated Broadr-reach Power Over Ethernet Poe Controller

Manufacturer

Broadcom Corp.

Datasheet

1.BCM59105.pdf (2 pages)

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Download datasheet (79Kb)

Quad Integrated BroadR-Reach™ Power over Ethernet (PoE) Controller

•

Standards support

• Supports IEEE 802.3at-2009 up to 100m

• Supports Power over Ethernet (PoE) on BroadR-Reach™ up to

• Minimal changes required (only at front end) of most IEEE-

High hardware integration

• Integrated switches

• Integrated current sense functionality

• Integrated microcontroller

• Integrated AC and DC disconnect options

Extensive hardware features

• Up to 25.5W into PD in standard IEEE 802.3at mode

• Over 5W per port at 500m in BroadR-Reach mode

• Programmable current limit

• Low dissipation eliminating the need for a heat sink

• Broadcom Serial Control (BSC) interface support to the host

• UART interface support to the host

• Robust switch protection circuit withstands Cable-Sourced

• Autonomous, semi-autonomous, or manual modes

• Real-time current, voltage, and temperature measurements

• Cascading of multiple devices (supporting up to 64 ports) with

• Includes four LED drivers reporting PoE port activity

• Integrated 3.3V buck regulator (DC:DC) to support up to

• Overtemperature protection

• Operates from a single 48V supply

Extensive software features

• Self-contained power allocation software

• Integrated 4-port power management

• Integrated power management for all ports in cascaded version

500m by extending basic IEEE PoE standards and concepts

compliant PDs

Electrostatic Discharge (CESD) events

available per port

the option of single hardware and software interface for the

host

200 mA

F E A T U R E S

BCM59105

•

Enables new PoE services that require extended reach over

one, two, and four pairs of either Cat3/5e or telephony grade

cables

Enables IP video/voice systems by enabling PoE over existing

coax cable plants with a range of up to 500m

Highest integration that allows for:

• Lowest total Bill of Materials (BOM) count

• Easier Printed Circuit Board (PCB) placement and PCB area

• Full functionality without external u-controller including

• Eliminates the need for an external 48V to 3.3V power

Further reduces BOM count via 3.3V DC:DC capability to be

shared across multiple BCM59105 devices

Eliminates the need for a heat sink due to the unique Rsense

mechanism, resulting in the elimination of the external sense

resistor

Makes layout and design easy via simple ground/power plane

Works with Broadcom PoE-enabled products for easy

implementation

Architected with system-oriented features to allow for system-

level differentiation, including:

• Single point of interface for host hardware and software

• Power management across all ports in cascaded configuration

• Programmable current limits and dynamic measurement per

• Rapid power-down to support multiple power supply failures

Supports a variety of applications:

• BroadR-Reach applications

• Routers and switches for Enterprise, SMB, SOHO, and

• Ethernet midspans

• Power Source Equipment (PSE) power injectors

• Integrated magnetics

saving

power management

conversion

port

commercial markets

S U M M A R Y O F B E N E F I T S

Related parts for bcm59105

bcm59105 Summary of contents

Page 1

... Eliminates the need for an external 48V to 3.3V power conversion • Further reduces BOM count via 3.3V DC:DC capability to be shared across multiple BCM59105 devices • Eliminates the need for a heat sink due to the unique Rsense mechanism, resulting in the elimination of the external sense resistor • ...

Page 2

... BCM59105 is designed and tested to withstand cable discharge events as well as ESD events in excess of 2 kV. The BCM59105 is a unique PSE controller that allows Broadcom to take advantage of both PoE and BroadR-Reach technology in the same solution. The controller integrates the microcontroller, power switches, low-loss current sense function, detection, and disconnect functionality ...

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