M52235EVB Freescale, M52235EVB Datasheet

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M52235EVB

Manufacturer Part Number
M52235EVB
Description
Manufacturer
Freescale
Datasheet
1.M52235EVB.pdf (2 pages)

Specifications of M52235EVB

Architecture
32-bit (not ARM)
Code Gen Tools Included
Code Warrior
Software Accessories Included
3rd Party Eval Tools
Lead Free Status / RoHS Status
Compliant
Power over Ethernet
802.3af Compliant
Powered Device
MCZ34670
Target Applications
> Access Points
> IP Phones
> IP Cameras
Overview
Power over Ethernet
Power over Ethernet (PoE) is defined by a standard set
forth by the Institute of Electrical and Electronics
Engineers (IEEE) 802.3af Task Force. The IEEE
standard defines the functional and electrical
characteristics of two optional power (non-data) entities,
a powered device (PD) and power sourcing equipment
(PSE). These entities allow devices to supply or draw
power using the same generic cabling as is used for
data transmission.
PoE technology is engineered to safely and reliably
transmit data and operating power (15W, 48V) over
existing Cat5/Cat5e/Cat6 LAN cables. This technology
is designed to allow wireless LAN access points, IP
phones and IP cameras to safely receive power over
standard category 5 LAN cabling without modification
to existing infrastructure.
MCZ34670EG Powered Device Solution
Freescale Semiconductor’s MCZ34670 is a fully
integrated solution that has a powered device interface
as well as a pulse width modulator controller. The
MCZ34670 is designed for IEEE 802.3af-compliant
PoE implementation. The MCZ34670 combines a
power interface port for an IEEE 802.3af PD and a
high-performance current mode switching regulator
needed for implementing end devices.
The MCZ34670 device on the PD side provides
comprehensive signature and power classification
functions. It controls inrush current limiting and
incorporates adjustable under voltage lockout. The
switching regulator provides excellent line and load
regulation and it drives an external power MOSFET
with sense resistor.
The MCZ34670 device is one of many PoE
solutions offered by Freescale, where networking
equipment manufacturers are able to directly
integrate PSE functionality.
®
34670 SIMPLIFIED APPLICATION DIAGRAM
Powered Device Interface
Pulse Width Modulator Controller
Other Features
Power over Ethernet Benefits
Features and Benefits
> IEEE 802.3af compliant and UNH-IOL tested
> Signature detection and classification
> Integrated isolation switch
> Current mode control
> Adjustable oscillator—100 kHz to 400 kHz
> Input overvoltage protection
> Extensive protection circuitry
> Wide operating temp range from -40ºC to +85ºC
> SOIC-20 Wide Body
> Terminals can be managed, shut down or reset
> Simplifies installation while saving space
> Saves time and money
> Minimal disruption when positioning to LAN cables
> Designed to safely receive power over
functionality
(default 250 kHz)
remotely in a centralized matter—no need for a
reset button or power switch
standard cables
> Programmable inrush current control
> Adjustable under voltage lockout
> Input voltage range up to 80 volts
> Offers an open-drain reset output
> Internal slope compensation circuitry
> 50 percent duty cycle limitation
> Restriction of hazardous substances
> Environmentally Preferable Purchasing (EPP)
> Uninterruptible power supply (UPS) guarantees
> In addition to using the data transfer, one can use
> Simplifies RF survey tasks in wireless LAN
(RoHS) compliant
power even during power failures
the SNMP network management infrastructure for
monitoring and control
systems since the access point can easily
be moved

M52235EVB Summary of contents

Page 1

... MOSFET with sense resistor. The MCZ34670 device is one of many PoE solutions offered by Freescale, where networking equipment manufacturers are able to directly integrate PSE functionality. Features and Benefits Powered Device Interface > ...

Page 2

... DC/DC converter. Learn More: For more information about Freescale products, please visit www.freescale.com/powermanagement. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006 ...