Datasheet > SI3402BISO-EVB

SI3402BISO-EVB

更新时间： 2024-11-22 01:19:43

品牌	Logo	应用领域
芯科 - SILICON		/
页数	文件大小	规格书
14页	431K
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ISOLATED EVALUATION BOARD FOR THE Si3402B

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SI3402BISO-EVB 数据手册

Si3402BISO-EVB

ISOLATED EVALUATION BOARD FOR THE Si3402B

1. Description

The Si3402B isolated evaluation board (Si3402BISO-EVB Rev 2) is a reference design for power supplies in

Power over Ethernet (PoE) Powered Device (PD) applications. The Si3402B is described more completely in the

data sheet and application notes. This document describes only the Si3402BISO-EVB evaluation board. An

evaluation board demonstrating the non-isolated application is described in the Si3402B-EVB User’s Guide.

2. Planning for Successful Designs

Silicon Labs strongly recommends the use of the schematic and layout databases provided with the evaluation

boards as the starting point for your design. Use of external components other than those described and

recommended in this document is generally discouraged. Refer to Table 2 on page 9 for more information on

critical component specifications. Careful attention to the recommended layout guidelines is required to enable

robust designs and full specification compliance. To help ensure design success, please submit your schematic

and layout databases to www.silabs.com/support for review and feedback.

3. Si3402B Board Interface

Ethernet data and power are applied to the board through the RJ-45 connector (J1). The board itself has no

Ethernet data transmission functionality, but, as a convenience, the Ethernet transformer secondary is brought out

to the test points. Power may be applied in the following ways:

 Connecting a dc source to Pins 1, 2 and 3, 6 of the Ethernet cable (either polarity).

 Connecting a dc source to Pins 4, 5 and 7, 8 of the Ethernet cable (either polarity).

 Using an IEEE 802.3-2015-compliant, PoE-capable PSE, such as Trendnet TPE-1020WS.

The Si3402BISO-EVB board schematics and layout are shown in Figures 1 through 6.

The dc output is at connectors J11(+) and J12(–). Boards are generally shipped configured to produce +5 V output

voltage but can be configured for +3.3 V or other output voltages as shown in Table 2 on page 9. The

preconfigured Class 3 signature also can be modified according to Table 3 on page 10. The D8–D15 Schottky-type

diode bridge bypass is recommended only for higher power levels (Class 3 operation). For lower power levels,

such as Class 1 and Class 2, the diodes can be removed. When the Si3402B is used in external diode bridge

configuration, it requires at least one pair of the CTx and SPx pins to be connected to the PoE voltage input

terminals (to the input of the external bridge).

The feedback loop compensation has been optimized for 3.3, 5, 9, and 12 V output as well as with standard and

low ESR capacitors in the output filter section (Table 2 on page 9). The use of low ESR capacitors is recommended

for lower output ripple, improved load transient response and low temperature (below 0 °C) operation.

Rev. 1.2 4/16

Si3402BISO-EVB

12 3 4 5 6 7...14

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与SI3402BISO-EVB相关器件

型号	品牌	获取价格	描述	数据表
Si3402-C-GM	SILICON	获取价格	This change is considered a minor change which does not affect form, fit, function, qualit
Si3402-C-GMR	SILICON	获取价格	This change is considered a minor change which does not affect form, fit, function, qualit
SI3402-TP	MCC	获取价格	Small Signal Field-Effect Transistor,
SI3403DV-T1-E3	VISHAY	获取价格	TRANSISTOR 5 A, 20 V, 0.07 ohm, P-CHANNEL, Si, POWER, MOSFET, ROHS COMPLIANT, TSOP-6, FET
SI3403DV-T1-GE3	VISHAY	获取价格	TRANSISTOR 5000 mA, 20 V, P-CHANNEL, Si, SMALL SIGNAL, MOSFET, HALOGEN FREE AND ROHS COMPL
SI3404	MCC	获取价格	Tape: 3K/Reel, 120K/Ctn.;
SI3404-A-GM	SILICON	获取价格	Power Supply Support Circuit,
SI3404HE3	MCC	获取价格	Tape: 3K/Reel, 120K/Ctn.;
Si34061-A-GM	SILICON	获取价格	Security and surveillance IP cameras
SI34062-A-GM	SILICON	获取价格	Power Supply Support Circuit,

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