SI3400ISO-EVB Silicon Laboratories Inc, SI3400ISO-EVB Datasheet

SI3400ISO-EVB

Manufacturer Part Number

SI3400ISO-EVB

Description

BOARD EVAL ISOLATED FOR SI3400

Manufacturer

Silicon Laboratories Inc

Type

PWM Controllersr

Datasheet

1.SI3400-E1-GM.pdf (20 pages)

Specifications of SI3400ISO-EVB

Mfg Application Notes

SI3400/01 High Power AppNote Si3400/1 PoE PD Controllers AppNote

Main Purpose

Special Purpose DC/DC, Power Over Ethernet

Outputs And Type

1, Isolated

Voltage - Output

Voltage - Input

44 ~ 57V

Regulator Topology

Flyback

Frequency - Switching

350kHz

Board Type

Fully Populated

Utilized Ic / Part

Si3400

Input Voltage

5 V

Output Voltage

3.3 V

Interface Type

Ethernet

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Product

Power Management Modules

For Use With/related Products

Si3400

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current - Output

Power - Output

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

336-1353
SI3400ISO-EVB

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A N D

Features

Applications

Description

The Si3400 and Si3401 integrate all power management and control

functions required in a Power-over-Ethernet (PoE) powered device (PD)

application. The Si3400 and Si3401 convert the high voltage supplied over

the 10/100/1000BASE-T Ethernet connection into a regulated, low-voltage

output supply. The optimized architectures of the Si3400 and Si3401

minimize the solution footprint, reduce external BOM cost, and enable the

use of low-cost external components while maintaining high performance.

The Si3400 and Si3401 integrate the required diode bridges and transient

surge suppressors, thus enabling direct connection of ICs to the Ethernet

RJ-45 connector. The switching power FET and all associated functions are

also integrated. The integrated switching regulator supports isolated

(flyback) and non-isolated (buck) converter topologies. The Si3400 and

Si3401 support IEEE STD™ 802.3-2005 (future instances are referred to as

802.3) compliant solutions as well as pre-standard products, all in a single

IC. Standard external resistors connected to the Si3400 and Si3401 provide

the proper 802.3 signatures for the detection function and programming of

the classification mode. Startup circuits ensure well-controlled initial

operation of both the hotswap switch and the voltage regulator. The Si3400

and Si3401 are available in low-profile, 20-pin, 5 x 5 mm QFN packages.

While the Si3400 is designed for applications up to 10 W, the Si3401 is

optimized for higher power applications (up to approximately 15 W). See

also “AN313: Using the Si3400/01 in High Power Applications” for more

information.

Rev. 0.9 8/07

U L L Y

IEEE 802.3 standard-compliant

solution, including pre-standard

(legacy) PoE support

Highly-integrated IC enables

compact solution footprints

Voice over IP telephones and

adapters

Wireless access points

Security cameras

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

transient surge suppressor

controller with on-chip power

FET

hotswap switch

Minimal external components

Integrated diode bridges and

Integrated switching regulator

Integrated dual current-limited

-I

W I T C H I N G

N T E G R A T E D

E G U L A T O R

8 0 2 . 3 - C

Point-of-sale terminals

Internet appliances

Network devices

High power applications (Si3401)

Support non-isolated and

isolated switching topologies

Comprehensive protection

circuitry

Programmable classification

circuit

Low-profile 5 x 5 mm 20-pin QFN

Pb-Free and RoHS-compliant

Transient overvoltage

protection

Undervoltage lockout

Early power-loss indicator

Thermal shutdown protection

Foldback current limiting

O M P L I A N T

P D I

Notes:

ISOSSFT

EROUT

N T E R F A C E

1. Pin VSSA added on revisions CZ

2. Pin ISOSSFT added on revisions

See Ordering Guide on page

SSFT

VDD

and higher.

CZ and higher. Function available

on revision E silicon. For Rev CZ,

or to disable this feature on

Revision E, tie this pin to VDD.

Ordering Information:

Pin Assignments

5 x 5 mm QFN

(Top View)

page 17.

Si3401

VNEG

(PAD)

Si3400/Si3401

CT1

CT2

VPOSF

SP1

Related parts for SI3400ISO-EVB

SI3400ISO-EVB Summary of contents

Page 1

Features IEEE 802.3 standard-compliant ...

Si3400/Si3401 Functional Block Diagram VPOSF VPOSS CT1 CT2 SP1 SP2 VNEG 2 RDET RCL SSFT VDD Detection & Classification Hotswap Control & Common Hotswap Bias Switch & Current limit HSO PLOSS VSSA Rev. 0.9 ISOSSFT Switcher EROUT Control FB Switching ...

Page 3

Section 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Si3400/Si3401 1. Electrical Specifications Table 1. Absolute Maximum Ratings (DC) Type Voltage CT1 to CT2 SP1 to SP2 2 VPOS HSO VSS1 or VSS2 SWO PLOSS to VPOS RDET RCL SSFT to VPOS EROUT to VSS1, VSS2, or VSSA FB ...

Page 5

Table 2. Absolute Maximum Ratings (Transient) Transient surge defined in IEC60060 as a 1000 V impulse of either polarity applied across CT1–CT2 or SP1–SP2. The shape of the impulse shall have a 300 ns full rise time and a 50 ...

Page 6

Si3400/Si3401 Table 4. Electrical Characteristics Parameter VPORT Input Offset Current Diode bridge leakage 2 IPORT Classification 3 IPORT Operating Current 4 Current Limit Hotswap FET On-Resistance + R SENSE Power loss VPORT Threshold Switcher Frequency 5 Maximum Switcher Duty Cycle ...

Page 7

Table 4. Electrical Characteristics (Continued) Parameter VDD accuracy @ 0.8 mA Softstart charging current Thermal Shutdown Thermal Shutdown Hysteresis Notes: 1. Transient surge defined in IEC60060 as a 1000 V impulse of either polarity applied to CT1–CT2 or SP1–SP2. The ...

Page 8

Si3400/Si3401 2. Typical Application Schematics To Ethernet PHY RJ- Figure 1. Schematic—Class 0 with Non-Isolated 5 V Output* *Note: This is a simplified schematic. See “AN296: Designs” for more details and complete application schematics. Table 7. Component ...

Page 9

To Ethernet PHY RJ- Figure 2. Schematic—Class 1 with Isolated 5.0 V Output* *Note: This is a simplified schematic. See “AN296: Designs” for more details and complete application schematics. Table 8. Components—Class 1 with Isolated 5.0 ...

Page 10

Si3400/Si3401 3. Functional Description The Si3400 and Si3401 consist of two major functions: a hotswap controller/interface and a complete pulse- width-modulated switching regulator (controller and power FET). 3.1. Overview The hotswap interfaces of the Si3400 and Si3401 provide the complete ...

Page 11

Table 9. Hotswap Interface Modes Input Voltage (|CT1- Si3400 and Si3401 CT2| or |SP1-SP2 2.7 V Inactive 2 Detection signature Detection turns off and internal bias starts 14 ...

Page 12

Si3400/Si3401 The resistor values associated with each class are shown in Table 10. Class Usage 0 Default 1 Optional 2 Optional 3 Optional 4 Reserved The 802.3 specification limits the classification time limit the power dissipated ...

Page 13

Power Loss Indicator A situation can occur in which power is lost at the input of the diode bridge and the hotswap controller does not detect the fault due to the VPOS to VNEG capacitor maintaining the voltage. In ...

Page 14

Si3400/Si3401 3.3.1. Switcher Startup The switching regulator is disabled until the hotswap interface has both identified itself to the PSE and charged the supply capacitor needed to filter the switching regulator's high-current transients. Once the supply capacitor is charged, the ...

Page 15

Pin Descriptions ISOSSFT Table 11. Si3400 and Si3401 Pin Descriptions (Top View) Pin# Name 1 EROUT Error-amplifier output and PWM input; directly connected to opto-coupler in isolated application. Soft-start output pin ramps voltage across external soft-start capacitor to allow ...

Page 16

Si3400/Si3401 5. Package Outline Figure 5 illustrates the package details for the Si3400 and Si3401. Table 12 lists the values for the dimensions shown in the illustration. Figure 5. 20-Lead Quad Flat No-Lead Package (QFN) Dimension ...

Page 17

Ordering Guide 1,2 Part Number Si3400-X-GM Pb-free; RoHS compliant Si3401-X-GM Pb-free; RoHS compliant Notes: 1. “X” denotes product revision. 2. Add an “R” at the end of the part number to denote tape and reel option. 3. Refer to ...

Page 18

Si3400/Si3401 OCUMENT HANGE IST Revision 0.3 to Revision 0.4 Updated Figure 2 on page 9. R9 now correctly connected to VNEG; RIMAX now connects to VDD. Added Table 6, “Package Thermal Characteristics,” on page 7. Updated Figure ...

Page 19

N : OTES Si3400/Si3401 Rev. 0.9 19 ...

Page 20

... 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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