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S i 3 4 8 2   S m a r t   P S E - 2 4   U G

12

  Rev. 0.2

Opti

onal

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+3V

3

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5.

6

R150

5.

6

C160

4.

7nF

C160

4.

7nF

C153

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1uF

C156

22uF

C156

22uF

FB

151

30 Ohm

FB

151

30 Ohm

C158

0.

1uF

C158

0.

1uF

Q1

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M

B

T3904

Q1

M

M

B

T3904

R156

4.

87K

R156

4.

87K

L151

33uH

L151

33uH

R153

30.1K

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470uF

+

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470uF

C150

0.

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C150

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R155

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87K

R155

2.

87K

C159

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7nF

C159

4.

7nF

D301

M

B

RS

1100

D301

M

B

RS

1100

R157

10K

R157

10K

U152

S

i3500

U152

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i3500

EROUT

1

SSF

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4

NC

5

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8

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9

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13

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17

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18

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Содержание Si3482 SMART PSE-24 KIT

Страница 1: ...orks with Si3452 PSE controllers and enables the use of a smaller lower cost and more efficiently utilized power supplies in managed or unmanaged Power over Ethernet PoE Power Sourcing Equipment PSE with up to 48 ports and up to three parallel power supplies The Smart PSE 24 kit demonstrates the use of the Si3482 in a 24 port system Figure 1 shows the assembled kit Figure 1 Smart PSE 24 Kit ...

Страница 2: ...interface is not isolated 2 Two Si3402ISO EVB powered device evaluation boards The boards are configured to provide a Class 3 signature 3 One Si3402ISO C4 EVB This board is configured to supply a Class 4 signature The Class 4 boards are marked Class 4 and can also be identified by the diodes on the back of the board 4 Three switchable loads The switchable loads draw approximately 6 5 13 or 19 5 W ...

Страница 3: ... PSE 24 via the supplied PoE USB adapter See the Si3452 Power Management GUI user s guide for detailed installation instructions Note that once the Si3482 has been configured it can run in hardware only mode without the GUI or PoE USB to UART adapter The demonstration assumes the Power Manager GUI has been used to configure the Si3482 as follows 40 W of power available on Power Supply 2 Set Power ...

Страница 4: ... Due to the PD input diode bridge and the dc to dc conversion efficiency each resistor causes approximately 6 5 W of power to be drawn from the PSE This means that the PD will draw approximately 6 5 13 or 19 5 W from the PSE depending on the number of load resistors connected Step 1 Connect a Class 3 PD with a 6 5 W load switches off into Port 1 and a Class 4 PD with a 6 5 W load into Port 2 The s...

Страница 5: ...is now granted 30 W since Port 1 is enabled for high power PoE Since only one resistor is connected approximately 6 5 W is drawn on each port Figure 5 Status Screen with Class 4 PD on Port 1 and Class 3 PDs on Ports 2 and 3 Step 3 Increase the Load on the ports to create a port overload by switching in more load resistors For Port 2 or Port 3 with Class 3 PDs the port overload condition occurs wit...

Страница 6: ...th Class 4 PD the overload does not happen even with 19 5 W being drawn by the PD Note Use caution because in this case the load resistors and PD will get hot Figure 7 Status Screen Showing Class 4 PD on Port 1 Drawing 19 W Step 4 Demonstrate the port priority and system overload protection features Disconnect all PDs and then connect the Class 3 PDs to Ports 2 and 3 with two load resistors so tha...

Страница 7: ...e tests While there is no visual display the behavior is the same The PD status can be seen by looking at the LEDs on the Si3402 evaluation boards located on the RJ 45 connector These LEDs glow steadily if power is supplied Note that in the schematics shown in Figure 6 the Reset and Pgood2 signals are routed through an Si8423 isolator The Si8423 default state is high so that when the USB connector...

Страница 8: ...OUT PGOOD2_OUT R837 2 1K R837 2 1K TPV805 TPV TPV805 TPV TPV807 TPV TPV807 TPV JP8 HEADER 1x3 JP8 HEADER 1x3 R834 2 1K R834 2 1K TPV803 TPV TPV803 TPV U802 Si3482 U802 Si3482 MISO 1 GND 3 VDD 4 RST 5 RSVD 6 RSVD 7 RSVD 8 MOSI 24 PSLCT 13 BAUD2 14 PS2 11 RSVD 9 PS3 10 PS1 12 SCL 17 NSS 23 BAUD1 15 BAUD0 16 SCK 2 SDA 18 INT 19 RSVD 20 RX 21 TX 22 GND EPAD 52V NI 52V NI TPV808 TPV TPV808 TPV R802 10K...

Страница 9: ...2V 52V 52V 3V3 3V3 H4 Si3452 RESET_L VREF_IN 3V3 3V3_RTN 52V VOUT1 VOUT2 VOUT3 VOUT4 INT SCL SDA 52V_RTN AD0 AD1 AD2 AD3 H0 Si3452 RESET_L VREF_IN 3V3 3V3_RTN 52V VOUT1 VOUT2 VOUT3 VOUT4 INT SCL SDA 52V_RTN AD0 AD1 AD2 AD3 H5 Si3452 RESET_L VREF_IN 3V3 3V3_RTN 52V VOUT1 VOUT2 VOUT3 VOUT4 INT SCL SDA 52V_RTN AD0 AD1 AD2 AD3 H2 Si3452 RESET_L VREF_IN 3V3 3V3_RTN 52V VOUT1 VOUT2 VOUT3 VOUT4 INT SCL S...

Страница 10: ...F C101 0 1uF C102 0 1uF C102 0 1uF C109 0 1uF C109 0 1uF C116 0 1uF C116 0 1uF C105 0 1uF C105 0 1uF C104 0 1uF C104 0 1uF C111 0 1uF C111 0 1uF R109 10K R109 10K SI3452 Si3452 U100 SI3452 Si3452 U100 VEE1 1 IC 11 VEE 2 VREF_IN 3 AOUT 5 AGND 6 RBIAS 7 AGND 8 OSC 9 VEE4 10 VOUT4 12 DET4 13 GND34 15 DET3 18 VOUT3 20 VEE3 22 RST 23 AD3 24 AD1 27 AD2 25 AD0 28 DGND 29 VDD 19 VEE2 31 VOUT2 32 DET2 33 G...

Страница 11: ...OD2_OUT RX TX 3V3LV 3V3 3V3 3V3 3V3LV 3V3LV C8 1uF C8 1uF C6 1uF C6 1uF C5 1uF C5 1uF C7 1uF C7 1uF ISOLATION U3 Si8423 ISOLATION U3 Si8423 VDD1 1 VDD2 8 B2 6 GND1 4 A2 3 GND2 5 A1 2 B1 7 ISOLATION U2 Si8431 ISOLATION U2 Si8431 VDD1 1 VDD2 16 GND2 9 GND1 8 GND1 2 GND2 15 A1 3 A2 4 B3 12 NC 11 A3 5 NC 6 B1 14 B2 13 EN1 7 EN2 10 Figure 12 UART Isolator Circuitry ...

Страница 12: ...156 4 87K L151 33uH L151 33uH R153 30 1K R153 30 1K C155 470uF C155 470uF C150 0 1uF C150 0 1uF R155 2 87K R155 2 87K C159 4 7nF C159 4 7nF D301 MBRS1100 D301 MBRS1100 R157 10K R157 10K U152 Si3500 U152 Si3500 EROUT 1 SSFT 2 Vdd 3 ISOSSFT 4 NC 5 RDET 6 HSO 7 NC 8 Vneg 9 NC 10 NC 11 Vposf 12 NC 13 NC 14 Vssa 15 Vposs 16 VSS1 17 SWO 18 VSS2 19 FB 20 EPAD 21 C161 0 33uF C161 0 33uF C152 1uF C152 1uF ...

Страница 13: ...E5 MX1 E6 MX3 E7 MX3 E8 J6H RJ 45 J6H RJ 45 MX0 H1 MX0 H2 MX1 H3 MX2 H4 MX2 H5 MX1 H6 MX3 H7 MX3 H8 J5G RJ 45 J5G RJ 45 MX0 G1 MX0 G2 MX1 G3 MX2 G4 MX2 G5 MX1 G6 MX3 G7 MX3 G8 J7B RJ 45 J7B RJ 45 MX0 B1 MX0 B2 MX1 B3 MX2 B4 MX2 B5 MX1 B6 MX3 B7 MX3 B8 J6A RJ 45 J6A RJ 45 MX0 A1 MX0 A2 MX1 A3 MX2 A4 MX2 A5 MX1 A6 MX3 A7 MX3 A8 J7D RJ 45 J7D RJ 45 MX0 D1 MX0 D2 MX1 D3 MX2 D4 MX2 D5 MX1 D6 MX3 D7 MX3...

Страница 14: ... 6 1 C156 22v 20 C0805 C0805X5R6R3 226M Venkel 7 1 C158 0 1 µF 10 C0603 C0603X7R250 104K Venkel 8 2 C159 C160 4 7 nF 10 C0603 C0603X7R160 472K Venkel 9 1 C161 0 33 µF 10 C0603 C0603X7R100 334K Venkel 10 1 C162 150 pF 10 C0603 C0603X7R160 151K Venkel 11 1 C803 4 7 µF 20 C1206 C1206X7R100 475M Venkel 12 3 C812 C813 C814 33 µF 20 C3 5X8MM RAD ECA2AM330 Panasonic 13 1 C815 10 µF 20 C0603 C0603X5R6R3 1...

Страница 15: ...1 16 W 1 R0603 CR0603 16W 2871F Venkel 37 1 R156 4 87 k 1 16 W 1 R0603 CR0603 16W 4871F Venkel 38 2 R833 R836 267 1 10 W 1 R0603 CR0603 10W 2670F Venkel 39 2 R834 R837 2 1 1 16 W 1 R0603 CR0603 16W 2101F Venkel 40 1 R841 332 1 10 W 1 R0603 CR0603 10W 3320F Venkel 41 1 SW1 SW Pushbutton 50 mA SW4N6 5X4 5 PB 101 0161 EV Mountain Switch 42 13 TPV100 TPV200 TPV300 TPV400 TPV500 TPV600 TPV802 TPV803 TP...

Страница 16: ...Si3482 Smart PSE 24 UG 16 Rev 0 2 4 4 Silkscreens Figure 15 Smart PSE 24Silk Screen ...

Страница 17: ...Si3482 Smart PSE 24 UG Rev 0 2 17 Figure 16 Smart PSE 24 Top Layer ...

Страница 18: ...Si3482 Smart PSE 24 UG 18 Rev 0 2 Figure 17 Smart PSE 24 Ground Layer ...

Страница 19: ...Si3482 Smart PSE 24 UG Rev 0 2 19 Figure 18 Smart PSE 24 Power Plane ...

Страница 20: ...Si3482 Smart PSE 24 UG 20 Rev 0 2 Figure 19 Smart PSE 24 Secondary Side ...

Страница 21: ...rt PSE 24 UG Rev 0 2 21 DOCUMENT CHANGE LIST Revision 0 1 to Revision 0 2 Added Easing Software Development with the Serial Packet Protocol SDK on page 7 to describe availability of the Serial Packet Protocol SDK ...

Страница 22: ...luded herein Additionally Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters Silicon Laboratories reserves the right to make changes without further notice Silicon Laboratories makes no warranty rep resentation or guarantee regarding the suitability of its products for any particular purpose nor does Silicon Laboratories assume any liability ar...

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