Ethernet Switch (Use case of SP-CAP, POSCAP, OS-CON)

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Requirements for capacitor performance used in Ethernet Switch

Trend of Ethernet Switch

Compact size

Requirement for capacitor performance

Compact size

Large capacity

Providing the optimized solution with a high to low voltage power source

Example)

48V system

os-con image

12V system

os-con image

5 and lower

poscap image

sp-cap image

use-case-pressing image By pressing the button for each circuit block, specific case is shown for reference.

Space saving

Quantity reduction

Case 1 - Replacement from MLCC to OS-CON

Introduction of a replacement by using a low ESR capacitor OS-CON SXV series capable of handling high ripple current.

Offered values:

Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

	Before	After
Capacitor type Mounted circuit area image	Ceramic capacitor (MLCC)	Surface-mounting type
Series, part number	-	SXV series(SMD) 80SXV56M
Specifications	100 V, 15 µF, 5.7 x 5.0 mm	80 V, 56 µF, ø10 x 12.6 mm
Quantity	9 pcs	1 pcs
Effective electrostatic capacitance	54 μF 15 μF x 9 pcs x 40 %=54 μF (Capacitance reduced by 48 VDC)	56 μF (No Capacitance reduced by 48VDC)
Mounted circuit area	286.2 mm²	112.4 mm²
Datasheet Specification, part number search	-	Datasheet Specification, part number search

Features of OS-CON SXV series

High voltage resistance: 100V max.
High ripple current: 3.28A rms　max. (105 ℃/100 kHz)
Low current leakage: 0.05 CV
High heat resistance: 125 ℃

Space saving

Quantity reduction

Case 2 - Replacement from polymer capacitor to OS-CON

Introduction of a replacement by using a low ESR capacitor OS-CON SVPG series capable of handling high ripple current.

Offered values:

Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

	Before	After
Capacitor type Mounted circuit area image	Previous product OS-CON Radial lead type	Surface-mounting type
Series, part number	-	SVPG series 16SVPG330M
Specifications	16 V, 270 µF, ø8 x 9 mm	16 V, 330 µF, ø6.3 x 10.４ mm
Quantity	3 pcs	2 pcs
Ripple current	15 A 5.0 A x 3 pcs	15 A 7.5 A x 2 pcs
Mounted circuit area	150.7 mm²	87.1 mm²

Features of OS-CON SVPG series, SVPK series

The replacement case shown above uses SVPG series , but high voltage resistance SVPK series can also be used.

		SVPG series	SVPK series
Rated voltage		16 V to 25 V	16 V to 50 V
Static capacitance		15 µF to 1,200 μF	10 µF to 1,200 μF
Features	High ripple current	7.5A rms max. (105 ℃/100 kHz) (16V)	1.7A rms max. (105 ℃/100 kHz) (16V, 20V)
	High capacitance	~ 1,200 μF
	Compact size	Φ5 x 4.5 mm	Φ5 x 5.9 mm
	Low ESR	6.5 mΩ ~	12 mΩ ~
	High voltage resistance	25 V max.	50 V max.
Datasheet Specification, part number search		Datasheet Specification, part number search	Datasheet Specification, part number search

Space saving

Quantity reduction

Case 3 - Replacement from MLCC to SP-Cap (by simulation)

Introduction of a replacement case by using the industry's top-class ultra-low ESR capacitor SP-Cap SX series in the low voltage side

Offered values:

Reduction of quantity with equivalent static effective capacitance, along with noise elimination with an low ESR.

	Before		After
Capacitor type Mounted circuit area image	Ceramic capacitor (MLCC)
Series, part number	-	-	SX series EEFSX0D561E4
Specifications	4 V, 100 μF, 2.0 x 1.2 mm	4 V, 47 μF, 2.0 x 1.2 mm	2 V, 560 µF, 7.3 x 4.3 x 1.9 mm
Quantity	31 pcs (24 + 7)		3 pcs
Effective electrostatic capacitance	1,603 µF (Capacitance reduced by 1.8 VDC)		1,680 µF (No Capacitance reduced by 1.8 VDC)
Transient response simulation	266 mV [P-P]		266 mV [P-P]
Mounted circuit area	133.0 mm²		132.5 mm²
Design support tool	-		Simulation data

Features of SP-Cap SX series,GX series,LX series

In the case of replacement from the MLCC shown above, the SX series is used, but in the Embedded board,
you can also use the same low ESR products, GX series , LX series .

		GX series	LX series	SX series
Rated voltage		2 V to 2.5 V		2 V to 6.3 V
Static capacitance		330 μF to 560 μF		82 μF to 560 μF
Number of terminals		2 terminals / 3 terminals	3 terminals	2 terminals
Features	High capacitance	~ 560 μF (2V)
Features	Low ESR	3 mΩ	4.5 mΩ ~
		Datasheet Specification, part number search	Datasheet Specification, part number search	Datasheet Specification, part number search

Space saving

Quantity reduction

Case 4 - Replacement from MLCC to POSCAP

In the low voltage side, we recommend the compact and large capacity POSCAP TPE series .

Offered values:

Achieving quantity reduction with equivalent capacitance along with compact size and space saving.

	Before		After
Capacitor type Mounted circuit area image	Ceramic capacitor (MLCC)
Series, part number	-	-	TPE series 2R5TPE1500MC
Specifications	4 V, 100 μF, 2.0 x 1.2 mm	4 V, 47 μF, 2.0 x 1.2 mm	2.5 V, 1500 µF, 7.3 x 4.3 mm
Quantity	31 pcs (24 + 7)		1 pc
Effective electrostatic capacitance	1,603 µF (Capacitance reduced by 1.8 VDC)		1,500 µF (No Capacitance reduced by 1.8 VDC)
Mounted circuit area	133.0 mm²		44.2 mm²

Features of POSCAP TPE series

In the replacement case shown above, TPE series D size product is used, but compact and large capacity
TPE series B size product can also be used.

		TPE series
Product dimensions		B size L3.5×W2.8	D size L7.3×W4.3
Rated voltage		2.0 V to 10 V	2.5 V to 10 V
Static capacitance		47 µF to 470 µF	68 µF to 1,500 μF
Features	Low profile	1.9 ｍｍ	1.4 ｍｍ
	Large capacitance	∼470 µF	∼1,500 µF
	Low ESR	9 mΩ ~ / 300 kHz(2.5V)	7 mΩ ~　(2.5V)
		Datasheet	Specification, part number search

Space saving

Quantity reduction

Case 5 - Replacement from MLCC to POSCAP

We recommend the compact and large capacity POSCAP TPE series .

Offered values:

Achieving quantity reduction with equivalent capacitance along with compact size and space saving.

	Before	After
Capacitor type Mounted circuit area image	Ceramic capacitor (MLCC)
Series, part number	-	TPE series 6TPE220MAPB
Specifications	6.3 V, 100 µF, 2.0 x 1.2 mm	6.3 V, 220 µF, 3.5 x 2.8 mm
Quantity	10 pcs	1 pc
Effective electrostatic capacitance	200 µF 100 μF x 10 pcs x 20% = 200 μF (Capacitance reduced by 5.0 VDC)	220 μF (No Capacitance reduced by 5.0 VDC)
Mounted circuit area	42.9 mm²	16.5 mm²

Features of POSCAP TPE series

In the replacement case shown above, TPE series B size product is used, but low profile large capacity
TPE series D size product can also be used.

		TPE series
Product dimensions		B size L3.5×W2.8	D size L7.3×W4.3
Rated voltage		2.0 V to 10 V	2.5 V to 10 V
Static capacitance		47 µF to 470 µF	68 µF to 1,500 μF
Features	Low profile	1.9 ｍｍ	1.4 ｍｍ
	Large capacitance	∼470 µF	∼1,500 µF
	Low ESR	9 mΩ ~ / 300 kHz(2.5V)	7 mΩ ~　(2.5V)
		Datasheet	Specification, part number search

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Ethernet Switch (Use case of SP-CAP, POSCAP, OS-CON)

Requirements for capacitor performance used in Ethernet Switch

Providing the optimized solution with a high to low voltage power source

Case 1 - Replacement from MLCC to OS-CON

Offered values: Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

Case 2 - Replacement from polymer capacitor to OS-CON

Offered values: Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

Case 3 - Replacement from MLCC to SP-Cap (by simulation)

Offered values: Reduction of quantity with equivalent static effective capacitance, along with noise elimination with an low ESR.

Case 4 - Replacement from MLCC to POSCAP

Offered values: Achieving quantity reduction with equivalent capacitance along with compact size and space saving.

Case 5 - Replacement from MLCC to POSCAP

Offered values: Achieving quantity reduction with equivalent capacitance along with compact size and space saving.

Offered values:

Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

Offered values:

Reduction of quantity and approx. 1/2 the circuit area for handling equivalent ripple current

Offered values:

Reduction of quantity with equivalent static effective capacitance, along with noise elimination with an low ESR.

Offered values:

Achieving quantity reduction with equivalent capacitance along with compact size and space saving.

Offered values:

Achieving quantity reduction with equivalent capacitance along with compact size and space saving.