P715.D (9/13)1pulseelectronics.com
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
Electrical Specifications @ 25°C - Operating Temperature -40°C to +130°C
Part Number Number of
Coupled Phases
Series
Inductance
(nH +/- 15%)
Equivalent
Transient
(nH)
Irms_TDC
(Adc)
Imax Peak3
per Phase
(Adc)
Open Circuit Inductance4,5 per Phase (nH)
Phase 1
(2-1) Phase 2
(4-3) Phase 3
(6-5) Phase 4
(8-7) Phase 5
(10-9) DCR per Phase6
(mΩ)
PA3142AHL 2 100
50 40 110
200nH Min at 0Adc (25C)
150nH Min at 25Adc (25C)
100nH Min at 23Adc (105C) na na na
0.25 Typical
0.30 Max
PA3143AHL 3 150 200nH Min at 0Adc (25C)
150nH Min at 25Adc (25C)
100nH Min at 23Adc (105C) na na
PA3144AHL 4 200 200nH Min at 0Adc (25C)
150nH Min at 25Adc (25C)
100nH Min at 23Adc (105C) na
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
production at 100khz, 100mVrms:
(ie: for PA3144AHL: Inductance (2-7) with (1-4 and 3-6 and 5-8 shorted) )
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
negative result of increasing ripple and peak currents throughout the system during steady-state operation.
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
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-
mance. The equivalent inductance per phase can be calculated as series inductance divided by the number of
phases. For more information on the operation of the coupled inductor topology, please contact Volterra.
3. The rated current (Irms_TDC) is the continuous current which results in a 55° C rise of the component temperature
above the ambient temperature (Conditions: Ta=55° C; 200LFM airflow; Tested on a Volterra evaluation board).
The peak current (Imax) is the current which causes a 20% reduction of the leakage inductance compared to no
load conditions at 105° C.
4. The open-circuit inductance per phase is the measured inductance across each phase when all other phases
are open circuit. Open circuit inductance is measured at 100kHz, 100mVrms. The open circuit inductance is equal
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.
5. All elevated temperature measurements were verified during design but are not measured during production
and therefore are for reference only.
6. DCR is measured between points a and b as shown on the mechanical drawing.
7. Optional tape and reel packaging can be ordered by adding a T sux to the part number (ie: PA3144AHL
becomes PA3144AHLT). Pulse complies to the industry standard tape and reel specification EIA481. The tape
and reel for this product has the following dimensions:
PA3142AHL: W=32.0, Po =16.0, Ko = 8.0
PA3143AHL: W=44.0, Po = 16.0, Ko =7.6
PA3144AHL: W=56.0, Po=16.0, Ko=7.6
PA3145AHL: W=72, Po=16.0, Ko=8.0
P715.D (9/13)2pulseelectronics.com
SMT POWER INDUCTORS
Power Beads - PA314xAHL Series Coupled Inductor
PA3142AHL
PA3143AHL
Mechanicals
PRIMARY SUGGESTED LAND PATTERN
PRIMARY SUGGESTED LAND PATTERN
Mechanicals
Schematic
Schematic
PULSE PA3142AHL
* All Dimensions in mm.
Unless stated otherwise the
tolerance on the listed
dimensions are:
.X ±0.2
.XX ±0.10
* All Dimensions in mm.
Unless stated otherwise the
tolerance on the listed
dimensions are:
.X ±0.2
.XX ±0.10
FINAL OUTLINE
P715.D (9/13)3pulseelectronics.com
SMT POWER INDUCTORS
Power Beads - PA314xAHL Series Coupled Inductor
PA3144AHL
Mechanicals
Mechanicals
Schematic
Schematic
PA3145AHL
35.5 ± 0.5
8 SURFACES
.127
8x 6.16 ± 0.20mm
10.5 ± 0.5
10.16 ± 0.10mm
8x 2.7 ± 0.2mm
8.0
4.0mm
9.0mm 3.1mm
7.0mm
3.6mm
4.3mm
8x 7.0mm
3x 3.5mm
4x 9.0mm
8x 4.0mm
(9.0mm)
MAX
123456
78
8X 3.1
4X 3.6
9.0
4.3
18.0
27.0
7.0
11.3 468
2
357
1
35
9.90 ±0.254X 3.70
8X 2.40
7
1
468
2
6.0
6.0
9.00
18.0
27.0 ±0.3
8X 3.1
4X 3.6
9.0
4.3
18.0
27.0
7.0
11.3 468
2
357
1
35
9.90 ±0.254X 3.70
8X 2.40
7
1
468
2
6.0
6.0
9.00
18.0
27.0 ±0.3
* All Dimensions in mm.
Unless stated otherwise the
tolerance on the listed
dimensions are:
.X ±0.2
.XX ±0.10
* All Dimensions in mm.
Unless stated otherwise the
tolerance on the listed
dimensions are:
.X ±0.2
.XX ±0.10
SUGGESTED LAND PATTERN
FINAL OUTLINE
FINAL OUTLINE
TOLERANCE ON PADS = ± 0.05
PRIMARY SUGGESTED LAND PATTERN
P715.D (9/13)4pulseelectronics.com
SMT POWER INDUCTORS
Power Beads - PA314xAHL Series Coupled Inductor
For More Information
Pulse Worldwide
Headquarters
12220 World Trade Drive
San Diego, CA 92128
U.S.A.
Tel: 858 674 8100
Fax: 858 674 8262
Pulse Europe
Zeppelinstrasse 15
71083 Herrenberg
Germany
Tel: 49 7032 7806 0
Fax: 49 7032 7806 12
Pulse China Headquarters
B402, Shenzhen Academy of
Aerospace Technology Bldg.
10th Kejinan Road
High-Tech Zone
Nanshan District
Shenzen, PR China 518057
Tel: 86 755 33966678
Fax: 86 755 33966700
Pulse North China
Room 2704/2705
Super Ocean Finance Ctr.
2067 Yan An Road West
Shanghai 200336
China
Tel: 86 21 62787060
Fax: 86 2162786973
Pulse South Asia
135 Joo Seng Road
#03-02
PM Industrial Bldg.
Singapore 368363
Tel: 65 6287 8998
Fax: 65 6287 8998
Pulse North Asia
3F No. 198, Zhongyuan Road
Zhongli City
Taoyuan County (32068)
Taiwan
Tel: 886 3 4356768
Fax: 886 3 4356823
Performance warranty of products oered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be
trademarks or registered trademarks of their respective owners. © Copyright, 2013. Pulse Electronics, Inc. All rights reserved.
DCR Measurement Location
a
1
2
b
PA314XHL