Broadcom
B CM591 01
C ontrol l e r and Power
Manage ment Te chnology
QUAD INTEGRATED IEEE 802.3AF-2003 PSE CONTROLLER AND
POWER MANAGEMENT SYSTEM WITH ENHANCED CAPABILITIES
Overview
The BCM59101 is a highly integrated quad power
source equipment (PSE) controller compatible with
IEEE 802.3af-2003. The controller is the industry
first to offer highly integrated architecture with
revolutionary enhancements that are targeted at
reducing the complexity of Power over Ethernet
(PoE) designs.
The BCM59101 integrates the following: microcon-
troller, power switches, low-loss current sense func-
tion, detection, classification, and voltage
converters as well as 3.3V bias regulator (DC:DC
converter) and AC disconnect functionality.
The high level of integration and innovation make
the device the most power-efficient integrated IEEE
802.3af PoE system.
The BCM59101 provides a networking-oriented
host interface that offers a full suite of power man-
agement. This easy-to-use interface can be
extended to manage up to 64 cascaded ports
through a single host interface.
The BCM59101 is designed with robustness and leg-
acy support. It offers detection and classification
mechanisms capable of detecting both IEEE
802.3af-compatible devices and legacy devices
simultaneously. Additionally, the BCM59101 is
designed and tested to withstand cable discharge
events as well as ESD events in excess of 2 kV.
Highlights
•
Industry-first quad PSE control-
ler to simplify PoE designs
•
Compatible with other
Broadcom POE-enabled
products
•
Most power-efficient IEEE
802.3af PoE system
•
User-friendly host interface
•
High IEEE standards support
combined with broad hardware
and software integration and
features
•
Supports applications for
various markets
•
Low BOM cost
•
Extensive hardware features
–
Certified by Underwriters Laboratory (UL) as
a current-limiting device per QVGS, so fuses
are not necessary.
–
15.4W per port to support PoE PDs.
–
Programmable current limit for both
IEEE 802.3af and extended power ranges.
–
Low power dissipation eliminating heat sink.
–
Broadcom Serial Control (BSC) and UART
interface support to the host.
–
Robust switch protection circuit withstands
cable discharge and ESD events (CESD).
–
Real-time current, voltage, and temperature
measurements available per port.
–
Cascading of multiple devices, up to 64 ports
support with the option of single hardware
and software interface for the host.
–
Includes four LED drivers reporting PoE port
activity.
–
Integrated 3.3V buck regulator (DC:DC) to
support up to 200 mA.
–
Overtemperature protection.
–
Operates from a single 48V supply.
•
Extensive software features
–
Self-contained power allocation software.
–
Integrated four-port power management.
–
Integrated power management for all ports
in cascaded version.
Architectural Features
BCM59101
Enterprise
SMB
Service
Provider
ONT/ONU
Supported
Best Choice
•
Standards support
–
IEEE 802.3af-2003-compliant
–
IEEE 802.3af-2003 classification scheme
support
–
Supports pre-IEEE 802.3af-2003 legacy
detection
•
High hardware integration: switches, current
sense functionality, microcontroller, and AC
and DC disconnect options
Benefits
•
Highest integration allows the following:
–
Lowest total BOM count.
–
Easier PCB placement and PCB area saving.
–
Full functionality without external
μ-controller,
including power management.
–
Eliminates need for an external 48V to 3.3V
power conversion.
BOARDCOM [ Broadcom Corporation. ]
