1. These high current coupled inductors were designed for (but

not limited to) use with the Pulse planar transformer series for

use in high density forward converter applications. The inductor

provides output filtering on the main winding, and at the same

time provides an efficient way to generate an isolated

primary side voltage for powering the converter’s switching

regulator integrated circuit. The above inductors have been

tested and approved by Pulse's IC partners and are cited in the

appropriate datasheet or evaluation board documentation at

these companies. To determine which IC and IC partners are

matched with the above Pulse part numbers, please see the IC

Cross Reference on the Pulse web page. Other inductance/cur-

rent ratings and turns ratios may be available. Please contact

Pulse Power Applications Engineering for more information.

2. The rated current as listed is either 85% of the saturation cur-

rent or the heating current depending on which value is lower.

3. The saturation current is the current which causes the induc-

tance to drop by 15% at the stated ambient temperatures

(25°C, 100°C). This current is determined by placing the com-

ponent in the specified ambient environment and applying a

short duration pulse current (to eliminate self-heating effects) to

the component.

4. The heating current is the dc current which causes the temper-

ature of the part to increase by approximately 45°C. This cur-

rent is determined by mounting the component on a PCB with a

.25" wide, 2oz. equivalent copper traces, and applying the cur-

rent to the device for 30 minutes with no force air cooling.

5. In high volt*time applications additional heating in the compo-

nent can occur due to core losses in the inductor which may

necessitate 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 and core losses should be taken into account.

Total Copper Losses (Pcu_total(W)):

Pcu(W)= .001* DCR(m

where:

ΔI = ripple current through inductor

Core Losses (Pcore(W)):

Use the Inductor Voltage versus Core Loss table to

determine the approximate core losses

Total Losses:

P total = Pcu total + CoreLoss

Temperature Rise:

The approximate temperature rise can be found by looking

up the calculated total losses in the Temperature Rise vs.

Power Dissipation curve.

Notes from Tables

Inductance vs Current @ 25°C

Current (A)

0

1

2

3

4

5

6

7

0

5

10

15

20

25

30

35

40

45

50

PA0373

PA0533

PA0492

PA0465

PA0480

PA0519

0.7

Inductor Voltage vs Core Loss

Core Loss (W)

0

5

10

15

20

25

0

0.1

0.2

0.3

0.4

0.5

0.6

PA0373/PA0465/PA0480/PA0519

PA0492/PA0533

Temperature Rise vs. Power (W) Dissipation

Total Power (W) Dissipation

0

20

40

60

80

100

120

01

23

4

5

67

SMT POWER INDUCTORS

Shielded Shaped Core - Spyglass

Coupled Inductors

For More Information:

Pulse Worldwide

Headquarters

12220 World Trade Dr.

San Diego, CA 92128

U.S.A.

www.pulseeng.com

Tel: 858 674 8100

Fax: 858 674 8262

Pulse South Asia

150 Kampong Ampat

#07-01/02

KA Centre

Singapore 368324

Tel: 65 6287 8998

Fax: 65 6280 0080

Pulse North Asia

No. 26

Kao Ching Rd.

Yang Mei Chen

Taoyuan Hsien

Taiwan, R. O. C.

Tel: 886 3 4641811

Fax: 886 3 4641911

Pulse China Headquarters

B402, Shenzhen

Tech-Innovation International

Tenth Kejinan Rd.

High-Tech Industrial Park

Nanshan District, Shenzhen

China

Tel: 86 755 33966678

Fax: 86 755 33966700

Pulse North China

Room 1503

XinYin Building

No. 888 YiShan Rd.

Shanghai 200233

China

Tel: 86 21 54643211/2

Fax: 86 21 54643210

Pulse

Europe

Einsteinstrasse 1

D-71083 Herrenberg

Germany

Tel: 49 7032 7806 116

Fax: 49 7032 7806 135

www.pulseeng.com

P582.A (1/07)

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, 2007. Pulse Engineering, Inc. All rights reserved.