PA1312AHL

www.pulseelectronics.com

53

SPM2007 (1/11)

smt POWer inductOrs

Power Beads - PA131xNL Series Coupled Inductors

mechanical

schematic

electrical specifications @ 25°c — Operating temperature -40°c to +130°c

PA1312NL

Pulse

Part No.

Number

of

Coupled

Phases

Transient

Inductance

per Phase

(nH ±20%)

per

Phase

(Adc)

nH ±20%, 0Adc

nH Min, 5Adc

(mW)

L1

L2

L3

L4

L5

L1

L2

L3

L4

L5

TYP

MAX

(1-2)

(3-4)

(5-6)

(7-8)

(9-10)

(1-2)

(3-4)

(5-6)

(7-8)

(9-10)

0.425

0.5

PA1312NL

2

50

40

310

310

−

−

−

240

240

−

−

−

PA1313NL

3

50

40

370

450

370

−

−

285

350

285

−

−

PA1314NL

4

50

40

370

490

490

370

−

285

385

385

285

−

PA1315NL

5

50

40

370

470

490

470

390

285

365

385

365

285

In a non-coupled multi-phase topology, the power supply

1.

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.

The rated current per phase is based on Volterra’s testing of the

2.

Pulse coupled inductors.

The open-circuit inductance per phase is the measured inductance

3.

(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).

The nominal value of DCR/phase is for reference only. For produc-

4.

tion testing, the maximum limit is used.

Notes

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

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Unless otherwise specified, all tolerances are ± .010

0,25

Weight ...... 3.0 grams

Tape & Reel ... 650/reel

Tray .......... 60/tray

Dimensions: Inches

mm