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pulseelectronics.com

SMT Power Inductors

Power Beads - Volta 1 & 2 series

P522.E (03/13)

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Performance warranty of products offered 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.

Notes:

1. The rated current as listed is either the saturation current or the heating current

depending on which value is lower.

2. The saturation current is the current which causes the inductance to drop by 10%

at the stated ambient temperatures (-40°C, 25°C, 125°C). This current is determined by

placing the component in the specified ambient environment and applying a short

duration pulse current (to eliminate self-heating effects) to the component.

3. The heating current is the DC current which causes the temperature of the part to

increase by approximately 30°C. This current is determined by mounting the component

on a PCB with .25” wide, 3 oz. equivalent copper traces, and applying the current to the

device for 30 minutes.

4. In high volt*time applications, additional heating in the component can occur due to core

losses in the inductor which may neccessitate derating the current in order to limit the

temperature rise of the component. In order to determine the approximate total losses

(or temperature rise) for a given application both copper losses and core losses should be

taken into account.

5. Optional Tape & Reel packaging can be ordered by adding a “

T” suffix to the part number,

(i.e. PA0277

T).

6. To order RoHS compliant part, add the suffix “

NL” to the part number (i.e. PA0277 becomes

PA0277

NL and PA0277T becomes PA0277NLT).

Estimated Temperature Rise:

Trise =

(°C)

Coreloss = K1 * (Fsw (kHz))

* (K2 * dl)

(mW)

Copper Loss = Irms * DCR (m

Ω) (mW)

Irms = IDC +

(Arms)

Fsw(kHz) = switching frequency (kHz)

dI = delta I across the component (A)

The temperature of the component (ambient temperature + temperature rise) should

be within the listed operating temperature range.

Coreloss (mW) + Copper Loss (mW)

K0

.833

1.6688

2.17

2

2

2

1

dl

12