AC adapter[USB output] (Use case of POSCAP, OS-CON)

To the top page of use case (SP-Cap, POSCAP, OS-CON)

Requirements for capacitor performance used in AC adapter

AC adapter image

Trend of AC adapter

Slimming down

Compact size

arrow image

Requirement for capacitor performance

Compact size

Low profile

High voltage resistance

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



server image


server image

use-case-pressing imageuse-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 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

基板面積イメージ PCB area image

Surface-mounting type

実装面積イメージ PCB area image


Series, part number - SVPG series (SMD)
Specification 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 Category temperature range - 55℃ to +105℃ - 55℃ to +125℃
High ripple current 7.5A rms max.
(105 ℃/100 kHz) (16V)
5.4A rms max.
(105 ℃/100 kHz) (16V, 20V)
High capacitance 1,200 μF max. (16V)
Compact size ø5 x 4.5 mm ø5 x 5.9 mm
Low ESR 6.5 mΩ ~ 12 mΩ ~
High voltage resistance 25 V max. 50 V max.
Datasheet Specification
/PN search
Datasheet Specification
/PN search
Space saving
Quantity reduction

Case 2 - Replacement from MLCC to POSCAP

Introduction of a replacement case by using compact and large capacitance low ESR capacitors, POSCAP TQC series

Offered values
Achieving quantity reduction with equivalent static capacitance, along with compact size and space saving
  Before After
Capacitor type

Mounted circuit area image
Ceramic capacitor (MLCC)

基板面積イメージ PCB area image

実装面積イメージ PCB area image


Series, part number - TQC series (SMD)
Specification 35 V, 10 µF, 2.0 x 1.2 mm 25 V, 22 µF, 3.5 x 2.8 mm
Quantity 20 pcs 2 pcs
Total electrostatic capacitance 40 µF
10 μF x 20 pcs x 20% = 40μF
(Capacitance reduced by 20 VDC)
44 μF
(No Capacitance reduced by 20VDC)
Mounted circuit area 85.8 mm2 33 mm2
Data sheet
Specification/PN search
Data sheet
/PN search

Features of POSCAP TQC series

  1. Ultra-high voltage resistance : 35V max.
  2. High ripple current : 1.8Arm (105 ℃/100 kHz)
  3. Compact size : L3.5 x W2.8 mm
  4. Low profile : H1.15 mm (L7.3mmxW4.3mm 16V)

↑Back to top