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
electrical specifications @ 25°c — Operating temperature -40°c to +130°c
Pulse
Part No.
Number
of
Coupled
Phases
2
3
4
5
Equlavent
1
Transient
Inductance
per Phase
(nH ±20%)
50
50
50
50
Irated
per
Phase
(Adc)
40
40
40
40
2
Open Circuit Ind. per Phase
3
nH ±20%, 0Adc
L1
(1-2)
310
370
370
370
L2
(3-4)
310
450
490
470
L3
(5-6)
−
370
490
490
L4
(7-8)
−
−
370
470
L5
(9-10)
−
−
−
390
Open Circuit Ind. per Phase
3
nH Min, 5Adc
L1
(1-2)
240
285
285
285
L2
(3-4)
240
350
385
365
L3
(5-6)
−
285
385
385
L4
(7-8)
−
−
285
365
L5
(9-10)
−
−
−
285
DCR/Phase
4
(mW)
TYP
MAX
PA1312NL
PA1313NL
PA1314NL
PA1315NL
0.425
0.5
Notes
1. 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 induc-
tance during transient operation. The equivalent transient
inductance per phase, as listed, 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 topology, 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 testing, the maximum limit is used.
mechanical
PA1312NL
Weight
. . . . . . 3.0 grams
Tape & Reel
. . . 650/reel
Tray
. . . . . . . . . . 60/tray
Dimensions:
Inches
mm
PA1312AHL
schematic
Unless otherwise specified, all tolerances are ± .010
0,25
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½½
½½½½½½
½½½½½½
½½½½½½
½½½½
½½½½
½½½½
½½½½
½½½½½
½½½½½
½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½
USA 858 674 8100
●
Germany 49 7032 7806 0
●
Singapore 65 6287 8998
●
Shanghai
86 21 54643211 / 2
●
China 86 755 33966678
●
Taiwan 886 3 4641811
www.pulseelectronics.com
53
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