Initial inductance
Measured at low current before any roll-off. Ranges from about 100 to 500 nanohenries across the WHPBU series, which suits high frequency multiphase stages.
Induktivitätsprodukte
WHPBU-100705N Power Bead Inductors
WHPBU-100705N covers 200 to 300 nanohenries at about 0.325 milliohm, with 31 amps heating current and 12 to 25 amps saturation at 100 degrees. It suits phases carrying moderate current where the higher inductance helps keep ripple down.
Artikelsuche und Produktauswahl
Artikelnummern für WHPBU-100705N Power Bead Inductors finden
Die Tabelle verwendet die aktuellen Produktdatensätze der englischsprachigen Website, veröffentlichte Auswahlfelder und artikelspezifische Links zu technischen Dateien.
* Spalten „Bild“ und „Artikelnummer“ fixiert · horizontal ziehen, um alle Spezifikationen anzuzeigen
| Bild | Datenblatt | Vergleichen | Downloads |
Kategorie
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Anfangsinduktivität (nH)
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Toleranz (± %)
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DCR (mΩ)
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1. Sättigungsstrom bei 25 ℃ (A) (typ.)
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2. Sättigungsstrom bei 100 ℃ (A) (typ.)
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Erwärmungsstrom (A) (typ.)
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Muster |
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| Bild | Artikelnummer | Datenblatt | Vergleichen | Downloads | Kategorie | Anfangsinduktivität (nH) | Toleranz (± %) | DCR (mΩ) | 1. Sättigungsstrom bei 25 ℃ (A) (typ.) | 2. Sättigungsstrom bei 100 ℃ (A) (typ.) | Erwärmungsstrom (A) (typ.) | Muster |
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WHPBU-100705N-R30L0 | SPEC | WHPBU-100705N | 300 | 15 | 0.325±7% | 19 | 12 | 31 |
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WHPBU-100705N-R22L0 | SPEC | WHPBU-100705N | 220 | 15 | 0.325±7% | 30 | 24 | 31 |
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WHPBU-100705N-R20L0 | SPEC | WHPBU-100705N | 200 | 15 | 0.325±7% | 33 | 25 | 31 |
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WHPBU-100705N-R15L0 | SPEC | WHPBU-100705N | 150 | 15 | 0.325±7% | 45 | 35 | 31 |
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WHPBU-100705N-R12L0 | SPEC | WHPBU-100705N | 120 | 15 | 0.325±7% | 65 | 50 | 31 |
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WHPBU-100705N-R10L0 | SPEC | WHPBU-100705N | 100 | 15 | 0.325±7% | 70 | 60 | 31 |
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WHPBU-100705N-R072L0 | SPEC | WHPBU-100705N | 72 | 15 | 0.325±7% | 80 | 70 | 31 |
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By series
WHPBU series by current capability
Series differ in body size, which sets DC resistance and how much current each phase carries.
So wählen Sie aus
Selecting a power bead inductor in four steps
Phase count and ripple set the inductance; thermals and peak current set the series.
- 01
Derive the inductance per phase
Work from input and output voltage, switching frequency, phase count and the ripple you can accept. More phases and higher frequency both reduce the inductance each phase needs.
- 02
Size on hot saturation current
Use the saturation figure at 100 degrees, not the 25 degree number. Your per-phase peak, including load transients, has to stay inside it.
- 03
Check heating current and DCR
Heating current caps the continuous RMS per phase. Multiply DC resistance by that current squared to see the copper loss the board has to shed.
- 04
Confirm layout and verify
Check body size, land pattern and phase-to-phase spacing, then measure ripple, current sharing and temperature rise on the real board.
Parameters
Reading power bead inductor ratings
Two saturation figures and a heating current, each defined under different conditions.
Tolerance
Stated as a percentage around the initial inductance. It feeds directly into your ripple calculation, so use the worst-case corner rather than the nominal value.
DC resistance
Sub-milliohm across the range, from about 0.18 to 0.47 milliohm depending on series. At high phase current even a tenth of a milliohm is measurable heat.
Saturation current at 25°C
The room-temperature limit, useful for comparing parts but optimistic for design. A real converter runs hotter than its test bench.
Saturation current at 100°C
The figure to design against. Saturation capability falls as the core heats, so this is what your peak phase current must stay below.
Heating current
The continuous RMS current that produces the datasheet's stated temperature rise. It caps steady-state load, while saturation caps the peak.
Vergleichen
WHPBU series side by side
DC resistance and heating current separate the series more than inductance does.
Zur Produktauswahl zurückkehren ↑| Kategorie | Artikelnummern | Anfangsinduktivität (nH) | Toleranz (± %) | DCR (mΩ) | 1. Sättigungsstrom bei 25 ℃ (A) (typ.) | 2. Sättigungsstrom bei 100 ℃ (A) (typ.) | Erwärmungsstrom (A) (typ.) | Aktion |
|---|---|---|---|---|---|---|---|---|
| WHPBU-100705N | 7 | 72, 100, 120, 150, 200, 220, 300 | 15 | 0.325±7% | 19, 30, 33, 45, 65, 70, 80 | 12, 24, 25, 35, 50, 60, 70 | 31 | Filtern → |
| WHPBU-100710N | 8 | 100, 120, 150, 180, 220, 300, 330, 470 | 15, 20 | 0.18±10% | 20, 35, 43, 60, 75, 90, 117 | 15, 30, 33, 50, 65, 75, 80, 100 | 70 | Filtern → |
| WHPBU-131308N | 6 | 110, 210, 260, 320, 440, 500 | 10, 15 | 0.32 ± 9.4% | 28, 35, 50, 60, 70, 120 | 23, 25, 35, 45, 55, 105 | 45 | Filtern → |
| WHPBU-150705N | 3 | 100, 120, 150 | 15 | 0.47±7% | 72, 87, 105 | 60, 75, 80 | 53 | Filtern → |
Anwendungsprüfung
Where power bead inductors are used
Confirm phase count, per-phase current, switching frequency and the thermal environment.
CPU and GPU core rails
- Confirm phase count and per-phase peak current including transients, then verify current sharing and temperature rise across all phases.
Server and datacentre power stages
- Airflow is usually available but ambient is high. Derate the heating current for the real inlet temperature, not for 25 degrees.
FPGA and ASIC supply rails
- Fast load steps dominate. Check the hot saturation figure against the transient peak, not just the steady-state current.
Point-of-load converters
- Single-phase POL stages still benefit from low DCR. Confirm the inductance suits the switching frequency and the ripple budget.
Documents
Power bead inductor datasheets
Datasheets carry the saturation curves, heating current and recommended land pattern.
Es werden repräsentative verfügbare Dateisätze angezeigt. Suchen Sie nach einer bestimmten Artikelnummer.
WHPBU-100705N-R30L0WHPBU-100705N
WHPBU-100705N-R22L0WHPBU-100705N
WHPBU-100705N-R20L0WHPBU-100705N
WHPBU-100705N-R15L0WHPBU-100705N
WHPBU-100705N-R12L0WHPBU-100705N
WHPBU-100705N-R10L0WHPBU-100705N
- 7
- Aufgeführte PDF-Datenblätter
- 0
- Aufgeführte 3D-Dateisätze
- 0
- Aufgeführte PCB-Footprints
Die veröffentlichten Produktinhalte von VOOHU werden vom technischen Team geprüft. Spezifikationen, Downloads und Informationen zum technischen Support sind bestimmten Artikelnummern zugeordnet, sodass Sie sie vor einer Muster- oder Angebotsanfrage prüfen können.
Kategorieübersicht
What a power bead inductor is and how to rate one
These parts are often mislabelled. Knowing what they are, and which of the three current figures to design against, prevents most of the errors.
Neues Design besprechen
FAE für eine Ersatztypenprüfung kontaktieren.
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Single winding, not coupled
A power bead inductor is a single winding of one or two turns over a ferrite core. It is not a coupled inductor and not a common mode choke, both of which have two windings that interact magnetically. The construction gives very low DC resistance and very high saturation current in a small body.
Three current figures, three jobs
Saturation at 25 degrees is a comparison number. Saturation at 100 degrees is the one your peak phase current must stay under, because the core loses capability as it heats. Heating current is the continuous RMS that produces the rated temperature rise. Size the peak on the hot figure, the steady state on heating current.
Why DC resistance dominates here
With phase currents in the tens of amps, loss rises with the square of current. A part at 0.18 milliohm and one at 0.47 milliohm differ by more than a factor of two in copper loss. On a dense multiphase board that shows up directly as board temperature, so read DCR early rather than last.
FAQ
Power bead inductor questions engineers ask
Answers cover what a power bead is, which current rating to design against and how to compare.
What per-phase current does WHPBU-100705N support?
Heating current is 31 amps, which caps the continuous RMS each phase can carry at the rated temperature rise. Saturation at 100 degrees runs from about 12 to 25 amps depending on the inductance value, and your peak phase current including transients must stay below that hot figure.
Why is the inductance range narrower than other series?
This series covers 200 to 300 nanohenries, a tighter band than the wider-ranging series. Higher inductance reduces ripple current for a given switching frequency, which suits designs running fewer phases or lower frequency. If you need lower inductance for a fast multiphase stage, compare the other series.
How does it compare with WHPBU-100710N?
They share a footprint family but the 100710N has roughly half the DC resistance, 0.18 against 0.325 milliohm, and more than double the heating current at 70 amps. If your phase current is high or board temperature is tight, the 100710N is the better starting point despite the taller body.
Which current figure should I size on?
Size the continuous load against the 31 amp heating current and the transient peak against the 100 degree saturation figure. The 25 degree saturation number is useful for comparing parts, but designing to it leaves no margin once the converter reaches working temperature.
How do I request samples or a quote?
With a complete part number, send the part number, quantity, delivery region and the date you need it. If you are still selecting, send the phase count, per-phase RMS and peak current, switching frequency and ambient temperature, and a sales engineer will confirm candidates.
Technischer Support
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