To the top page of use case (SP-Cap, POSCAP, OS-CON)
Requirements for capacitor performance used in AC adapter
Trend of AC adapter
Slimming down
Compact size
Requirement for capacitor performance
Compact size
Low profile
High voltage resistance
Providing the optimized solution with a high to low voltage power source
Example)
12Vsystem
20Vsystem
By pressing the button for each circuit block, specific case is shown for reference.
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  |
 Surface-mounting type
|
|
| Series, part number | - |
SVPG series (SMD) 16SVPG330M |
|
| 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 |
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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)  |
|
|
| Series, part number | - |
TQC series (SMD) 25TQC22MYFB |
|
| 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 |
- |
POSCAP TQC Series |
Data sheet |
|
Specification /PN search |
|||
Features of POSCAP TQC series
- Ultra-high voltage resistance : 35V max.
- High ripple current : 1.8Arm (105 ℃/100 kHz)
- Compact size : L3.5 x W2.8 mm
- Low profile : H1.15 mm (L7.3mmｘW4.3mm 16V)