SI3480MS8-KIT Silicon Laboratories Inc, SI3480MS8-KIT Datasheet

SI3480MS8-KIT

Manufacturer Part Number

SI3480MS8-KIT

Description

KIT EVAL 8PORT SI3480/52/SI3500

Manufacturer

Silicon Laboratories Inc

Datasheets

1.SI3480-A01-GM.pdf (14 pages)

2.SI3480MS8-KIT.pdf (22 pages)

Specifications of SI3480MS8-KIT

Main Purpose

Embedded

Utilized Ic / Part

Primary Attributes

Secondary Attributes

Product

Power Management Development Tools

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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Si3480 P

Features



Description

The Si3480 is a power manager intended for use with the Si3452 Power

over Ethernet (PoE) controller. The Si3480 enables the use of a smaller,

lower cost, and more efficiently-utilized power supply in an unmanaged

PoE Power Sourcing Equipment (PSE) system.

The Si3452 is capable of delivering over 30 W per port, which means that,

in a typical 8-port system, a 240 W power supply would have to be used

to avoid overload. Typically, not all ports are used at full power; so, a

smaller power supply in the range of 30 to 150 W can be used along with

the Si3480 power management controller.

The Si3480 power management controller is pin programmed. The pins

are used to set the power supply capacity, the number of low power

(category 1, 15.4 W), and high power (category 2, 30 W) ports, the port

priority, and the detection timing (Alternative A or Alternative B). The

Si3480 uses the real time overload and current monitoring capability of

the Si3452 to manage power for up to eight ports. Power management is

based on actual consumption rather than mere classification in order to

supply power to the greatest number of ports.

The Si3480 also provides LED drive to indicate port status and drive an

LED bar graph display to indicate the power supply capacity in use. If a

port is denied power due to power supply capacity limitations, the LED

indicators provide a simple and intuitive indication, helping a user

recognize and correct the overload situation by rebalancing loads or

adding mid-span power injectors to ports that would not otherwise be

powered. In case of a port overload, the port is easily re-enabled by

disconnecting the Powered Device (PD) and then reconnecting the PD

after correcting the overload situation.

Rev. 1.0 7/10

Enables use of a smaller power

supply for a 4 or 8 port PoE

system

Self-contained solution operates

without the need for a host for

unmanaged operation



Fully compliant with IEEE 802.3

clause 33 for Power over Ethernet

including the 802.3at amendment

for higher power (30 W category 2

ports)

No software required

No data isolation required

OWER

ANAGEMENT



Pin programmable for overall

power supply capacity, port

power level, port priority, and

detection timing

LED indication of port status and

overall power consumption

20-pin Quad flat package

(4x4 mm)



Extended operating temperature

range (–40 to +85 °C)

compliant

4x4 mm PCB footprint; RoHS

O N T R O L L E R

GND

VDD

SDA

RST

See Ordering Guide on page 9.

Ordering Information:

Pin Assignments

(Top View)

Si3480

PRIOCFG

ALTCFG

LED8

LED7

LED6

Si3480

Related parts for SI3480MS8-KIT

SI3480MS8-KIT Summary of contents

Page 1

Si3480 P M OWER Features  Enables use of a smaller power supply for port PoE system  Self-contained solution operates without the need for a host for unmanaged operation No software required  No data ...

Page 2

Si3480 Functional Block Diagram Configuration Pins Power Provided Port Power Port Priority Detection Timing 2 Si3480 Power Management Controller Power Port Meter Status LEDs LEDs Rev. 1.0 Si3452 PoE Controllers ...

Page 3

T C ABLE O F ONTENTS Section 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Si3480 1. Electrical Specifications Table 1. Recommended Operating Conditions Description Symbol Operating Temperature T A Range V Supply Voltage LED Current I LED Table 2. Absolute Maximum Ratings Parameter Ambient Temperature under Bias Storage Temperature Voltage on ...

Page 5

Typical Application Schematic +3V3 -52V_RTN +3V3_RTN R10310K R10310K 1K R102 1K R102 1K 1K R101 R101 PUSHBUTTON PUSHBUTTON SW SW 10K 10K SW1 SW1 R100 R100 GND VDD +3V3 3 R117 R117 R116 R116 R113 R113 R112 R112 R115 ...

Page 6

Si3480 3. Functional Description 3.1. Device Initialization and Configuration Pins The Si3480 will discover Si3452 devices at addresses 0x20 and 0x21 at power up. If only one device is found, it will manage the power for four ports. If two ...

Page 7

LEDs Upon power application or reset (by SW1 in the upper left corner), the Si3480 probes to see whether there are one or two Si3452 ICs connected ( ports). The Si3480 then controls the LED display in ...

Page 8

Si3480 5. Pin Descriptions Pin # Pin Name Pin Type 1 SDA Open Collector Connect to Si3452 SDA and pull-up resistor. 2 GND Power 3 VDD Power 4 RST Input LED1 Output 7 LED2 Output 8 ...

Page 9

Ordering Guide Ordering Part Number Si3480-A01-GM An eight-port evaluation kit with the Si3480, two Si3480 Kit Si3452 controllers and the Si3500 for generating Notes: 1. Add “R” to the part number to denote tape and reel option (Si3480-A01-GMR) 2. ...

Page 10

Si3480 7. Package Outline Figure 2 illustrates the package details for the Si3480. Table 7 lists the values for the dimensions shown in the illustration. Table 7. QFN-20 Package Dimensions Dimension Min A 0.80 A1 0.00 b 0.18 D 4.00 ...

Page 11

Landing Pattern: 20-Pin QFN Figure 3 illustrates the landing pattern for the Si3480. Table 8 lists the values for the dimensions shown in the illustration. Figure 3. QFN-20 Recommended PCB Land Pattern Table 8. QFN-20 PCB Land Pattern Dimensions ...

Page 12

Si3480 9. Top Marking: 20-Pin QFN Figure 4 illustrates the top markings for the Si3480. Table 9 explains the values for the markings shown in the illustration. Line 1 Marking: Line 2 Marking: Line 3 Marking: Line 4 Marking: 12 ...

Page 13

OCUMENT HANGE IST Revision 0.1 to Revision 1.0  Updated Table 3 Updated typical output low, typical output high, and  sense accuracy. Updated pin description.  Rev. 1.0 Si3480 13 ...

Page 14

... Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap- plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. ...

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