PA3142AHL Datasheet, PDF (1/4 Pages) Pulse A Technitrol Company – Coupled Inductor

SMT POWER INDUCTORS
Power Beads - PA314xAHL Series Coupled Inductor
8mm Coupled Inductors for Volterra Gen2.5 Applications
For use only with Volterra chipsets
Coupled Inductors enable:
• Phase ripple current reduction due to AC
magnetic field cancellation within the
inductor core.
• Improved efficiency due to lower peak
currents
• Reduction in required output capacitance
Part Number
Number of
Coupled Phases
PA3142AHL
2
Series
Inductance
(nH +/- 15%)
100
Electrical Specifications @ 25°C - Operating Temperature -40°C to +130°C
Equivalent
Transient
(nH)
Irms_TDC
(Adc)
Imax Peak³
per Phase
(Adc)
Phase 1
(2-1)
Open Circuit Inductance^4,5 per Phase (nH)
Phase 2 Phase 3 Phase 4 Phase 5
(4-3) (6-5) (8-7) (10-9)
200nH Min at 0Adc (25C)
150nH Min at 25Adc (25C) na
na
na
100nH Min at 23Adc (105C)
DCR per Phase⁶
(mΩ)
PA3143AHL
3
PA3144AHL
4
200nH Min at 0Adc (25C)
150
150nH Min at 25Adc (25C)
na
na
50
40
110
100nH Min at 23Adc (105C)
200nH Min at 0Adc (25C)
0.25 Typical
0.30 Max
200
150nH Min at 25Adc (25C)
na
100nH Min at 23Adc (105C)
PA3145AHL
5
250
200nH Min at 0Adc (25C)
150nH Min at 25Adc (25C)
100nH Min at 23Adc (105C)
Notes:
1. The series inductance is the inductance when all phases are tied in series and is measured and verified in
4. The open-circuit inductance per phase is the measured inductance across each phase when all other phases
production at 100khz, 100mVrms:
are open circuit. Open circuit inductance is measured at 100kHz, 100mVrms. The open circuit inductance is equal
(ie: for PA3144AHL: Inductance (2-7) with (1-4 and 3-6 and 5-8 shorted) )
to the magnetizing inductance per phase (Lm) plus the equivalent transient inductance (Lk). The open circuit
inductance values at 25C (0Adc and 26 Adc) are measured and verified during production.
2. In a non-coupled multi-phase topology, the power supply sees the same inductance during transient and
steady-state conditions. As a result, any attempt to lower the inductance to improve transient response has the 5. All elevated temperature measurements were verified during design but are not measured during production
negative result of increasing ripple and peak currents throughout the system during steady-state operation.
and therefore are for reference only.
However, in a coupled inductor multi-phase topology, the interaction of magnetic fields from each phase
enables an overall reduction in ripple current during steady-state operation and a lower equivalent inductance 6. DCR is measured between points a and b as shown on the mechanical drawing.
during transient operation. The equivalent transient inductance per phase, as listed, represents the actual value
of inductance (Lk) that would be required in an non-coupled topology to realize the same transient perfor- 7. Optional tape and reel packaging can be ordered by adding a T suffix to the part number (ie: PA3144AHL
mance. The equivalent inductance per phase can be calculated as series inductance divided by the number of becomes PA3144AHLT). Pulse complies to the industry standard tape and reel specification EIA481. The tape
phases. For more information on the operation of the coupled inductor topology, please contact Volterra.
and reel for this product has the following dimensions:
PA3142AHL: W=32.0, Po =16.0, Ko = 8.0
3. The rated current (I ) is the continuous current which results in a 55° C rise of the component temperature
rms_TDC
above the ambient temperature (Conditions: Ta=55° C; 200LFM airflow; Tested on a Volterra evaluation board).
PA3143AHL: W=44.0, Po = 16.0, Ko =7.6
PA3144AHL: W=56.0, Po=16.0, Ko=7.6
The peak current (Imax) is the current which causes a 20% reduction of the leakage inductance compared to no
PA3145AHL: W=72, Po=16.0, Ko=8.0
load conditions at 105° C.
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