smt POWer inductOrs
Power Beads - PA131xNL Series Coupled Inductors
Gen 1.0 Coupled Inductors (2,3,4 and 5 phases)
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
Halogen Free
elꢀꢁꢅꢆꢃꢁal spꢀꢁꢃfꢃꢁaꢅꢃoꢂꢇ @ 25°c — Opꢀꢆaꢅꢃꢂg tꢀꢄpꢀꢆaꢅꢈꢆꢀ -40°c ꢅo +130°c
Open Circuit Ind. per Phase3
nH 20%ꢀ 0Adc
Open Circuit Ind. per Phase3
nH Minꢀ 5Adc
DCR/Phase4
Equlavent1
Transient
Inductance
per Phase
(nH 20%)
Number
of
Coupled
Phases
Irated2
per
Phase
(Adc)
(mW)
Pulse
L1
L2
L3
L4
L5
L1
L2
L3
L4
L5
TYP
MAX
Part No.
(1-2)
(3-4)
(5-6)
−
(7-8) (9-10) (1-2)
(3-4)
(5-6)
−
(7-8) (9-10)
−
−
−
−
−
−
−
−
PA1312NL
PA1313NL
PA1314NL
PA1315NL
2
3
4
5
50
50
50
50
40
40
40
40
310
370
370
370
310
450
490
470
240
285
285
285
240
350
385
365
−
−
0.425
0.5
370
490
490
285
385
385
370
470
285
365
390
285
Notes
1.In a non-coupled multi-phase topologyꢀ the power supply
sees the same inductance during transient and steady-state
conditions. As a resultꢀ 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. Howeverꢀ in a coupled inductor
multi-phase topologyꢀ the interaction of magnetic fields from
each phase enables an overall reduction in ripple current
during steady-state operation and a lower equivalent induc-
tance during transient operation. The equivalent transient
inductance per phaseꢀ as listedꢀ represents the actual value
of inductance that would be required in an non-coupled topol-
ogy to realize the same transient performance. This value is
achieved by core and winding geometry and is not directly
measured by Pulse. For more information on the operation of the
coupled inductor topologyꢀ please contact Volterrra.
2.The rated current per phase is based on Volterra’s testing of the
Pulse coupled inductors.
3.The open-circuit inductance per phase is the measured inductance
(at specified current) across each phase when all other phases are
open-circuit. The open circuit inductance is equal to the magne-
tizing inductance per phase (Lm) plus the equivalent transient
inductance (Lk).
4.The nominal value of DCR/phase is for reference only. For produc-
tion testingꢀ the maximum limit is used.
sꢁhꢀꢄaꢅꢃꢁ
mꢀꢁhaꢂꢃꢁal
PA1312NL
Weight . . . . . . 3.0 grams
Tape & Reel . . . 650/reel
Tray . . . . . . . . . . 60/tray
Inches
mm
Dimensions:
.010
0,25
PA1312AHL
±
Unless otherwise specified, all tolerances are
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53
SPM2007 (1/11)