SI3400 datasheet(9/20 Pages) SILABS

номер детали	SI3400

подробное описание детали	FULLY-INTEGRATED 802.3-COMPLIANT PD INTERFACE AND SWITCHING REGULATOR

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производитель	SILABS [Silicon Laboratories]

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9 / 20 page

Si3400/Si3401

Rev. 0.9

9

Figure 2. Schematic—Class 1 with Isolated 5.0 V Output*

*Note: This is a simplified schematic. See “AN296:

Using the Si3400/01 PoE PD Controller in Isolated and Non-Isolated

Designs” for more details and complete application schematics.

Table 8. Components—Class 1 with Isolated 5.0 V Output

Item

Type

Value

Toler.

Rating

Notes

C1

Capacitor

15 µF

20%

100 V

Switcher supply capacitor. Several paral-

lel capacitors are used for lower ESR.

C2

Capacitor

0.1 µF

20%

100 V

PD input supply capacitor.

C3

Capacitor

1100 µF

20%

10 V

Switcher load capacitor. 100 µF in parallel

1000 µF and optional 1 µH inductor for

additional filtering.

C4

Capacitor

15 nF

10%

16 V

Feedback compensation.

C5

Capacitor

220 nF

10%

16 V

Feedback compensation.

C7

Capacitor

0.1 µF

20%

16 V

VDD bypass capacitor.

C8

Capacitor

1 µF

20%

16 V

Isolated mode soft start (tie ISOSSFT to

VDD if this feature is not used).

R1

Resistor

25.5 k

Ω

1%

1/16 W

Detection resistor.

R2

Resistor

4.99 k

Ω

1%

1/16 W

Pull-up resistor.

R3

Resistor

100

Ω

1%

1/16 W

Feedback compensation resistor.

R4

Resistor

10 k

Ω

1%

1/16 W

Feedback compensation resistor.

R5

Resistor

2.05 k

Ω

1%

1/16 W

Pull-up resistor.

R6

Resistor

36.5 k

Ω

1%

1/16 W

Feedback resistor divider.

R7

Resistor

12.1 k

Ω

1%

1/16 W

Feedback resistor divider.

R8

Resistor

127

Ω

1%

1/16 W

Classification resistor.

D1

Diode

10 A

40 V

Schottky diode; part no. PN PDS1040.

D2

Diode

1 A

100 V

Snubber diode (1N4148)

D3

Diode

15 V

9 A

Snubber diode (DFLT15A)

T1

Transformer

40 µH

Coilcraft part number FA2672 (5 V).

PS2911

Optocoupler

TLV431

Voltage reference

C1

Si3400

Si3401

RJ-45

To Ethernet PHY

RCL

RDET

CT1

CT2

SP1

SP2

C2

SWO

C3

D1

R5

R7

R6

PS2911

T1

R2

VDD

EROUT

R1

ISOSSFT

R3

C5

C4

R4

C7

R8

D2

D3

C8

Аналогичный номер детали - SI3400

производитель	номер детали	датащи	подробное описание детали
Silicon Laboratories	SI3400	458Kb / 20P	Support non-isolated and isolated switching topologies Comprehensive protection circuitry
Silicon Laboratories	SI3400-EVB	225Kb / 14P	The Si3400, Si3401, and Si3402 non-isolated evaluation
List of Unclassifed Man...	SI3400-GM	458Kb / 20P	FULLY-INTEGRATED 802.3-COMPLIANT PD INTERFACE AND SWITCHING REGULATOR
Silicon Laboratories	SI3400-X-GM	458Kb / 20P	Support non-isolated and isolated switching topologies Comprehensive protection circuitry

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Аналогичное описание - SI3400

производитель	номер детали	датащи	подробное описание детали
List of Unclassifed Man...	SI3400-GM	458Kb / 20P	FULLY-INTEGRATED 802.3-COMPLIANT PD INTERFACE AND SWITCHING REGULATOR
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Skyworks Solutions Inc.	SI3404	474Kb / 26P	Fully-Integrated IEEE 802.3 Type 1-Compliant POE PD Interface and High-Efficiency Switching Regulator with Compact Footprint Revision 0.5 February, 2018
Skyworks Solutions Inc.	SI3406X	920Kb / 37P	Fully-Integrated IEEE 802.3-Compliant POE PD Interface and High-Efficiency Switching Regulators with Sleep, Wake, and LED Drive Revision 1.1 July, 2022
Linear Technology	LTC4267	2Mb / 32P	Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator
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Аналогичный номер детали - SI3400

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