Datasheet > AN313

AN313

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
芯科 - SILICON		高功率电源
页数	文件大小	规格书
6页	121K
描述
USING THE Si3400 AND Si3401 IN HIGH POWER APPLICATIONS

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AN313 数据手册

AN313

3. Other BOM Considerations

4. Recommended Options for Higher

Power Applications

Table 1 lists the recommended options for higher-power,

isolated supply applications.

For 802.3af-compliant applications, the basic BOM

recommendations for the Si3400 and Si3401 are

documented in “AN296: Using the Si3400/01 POE PD

Controller in Isolated and Non-Isolated Designs” and the

Si3400 and Si3401 ISO EVB user's guides.

When using the Si3400 or Si3401 at higher power

levels, the following other BOM changes are required:

1. Pulse transformer:

A Coilcraft FA2671 (10:3–3.3 V), FA2672 (10:4–5 V),

or FA2732 (1:1–12 V) (transformer with an EP10

core and 40 µH magnetizing inductance is currently

recommended. For the higher-power application, an

EP13 core with the same turns ratio and magnetizing

inductance is used.

2. Input Ethernet transformer and jack:

Several vendors are now offering Ethernet

transformers for PoE+, but these are more

commonly not integrated in the Ethernet RJ-45 jack.

Table 1. Recommended Options for Higher Power Applications

PD Controller

Circuit Configuration

Output Power

Efficiency

802.3af

Compliant

Evaluation

Systems

Power

Si3400

Si3401

On-chip diode bridges

EP10 or EP13 transformer

10 W

80%

Yes

Si3400ISO-EVB

Si3400-EVB

Diode bridge bypass

EP13 transformer

14–15 W

82%

Si3401ISO-EVB

Si3401-EVB

Notes:

1. EP13 is recommended for short circuit protection.

2. Available output power will depend on minimum PSE voltage and maximum UTP cable resistance.

Rev. 0.2

123 4 5 6

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