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65

SPM2007 (11/07)

SMT POWER INDUCTORS

Flat Coils - PG0434NL Series

Notes from Tables

1. The temperature of the component (ambient plus temperature

rise) must be within the specified operating temperature range.

2. Inductance at Irated is a typical inductance value for the

component taken at rated current.

3. The rated current listed is the lower of the saturation current

@ 25°C or the heating current.

component inductance drops by 20% (typical) at an ambient

temperature of 25°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.

component temperature by approximately 40°C. The heating

current is determined by mounting the component on a typical

PCB and applying current for 30 minutes. The temperature is

measured by placing the thermocouple on top of the unit under

test. Take note that the component’s performance varies

depending on the system condition. It is suggested that the

component be tested at the system level, to verify the tempera-

ture rise of the component during system operation.

6. Core loss approximation is based on published core data:

Where: Core Loss = in Watts

K1= 1.05E-10

f = switching frequency in kHz

K1 & K2 = core loss factors

ΔΔI = delta I across the component in Ampere

K2

ΔΔI = one half of the peak to peak flux density

across the component in Gauss

7.

Unless otherwise specified, all testing is made at

8.

Optional Tape & Reel packaging can be ordered by adding a "T"

suffix to the part number (i.e. PG0434.401NL becomes

PG0434.401NLT). Pulse complies to industry standard tape and

reel specification EIA481.

Typical Inductance vs Current Characteristics @ 25°C

Typical Core Loss vs Peak Flux Density

DC BIAS (A)

PG0434.282NL

1 3 5 7 9 11 1315 17192123 25272931 33353739 414345 47495153 555759 61

0.0

0.3

0.5

0.8

1.0

1.3

1.5

1.8

2.0

2.3

2.5

2.8

3.0

PG0434.202NL

PG0434.142NL

PG0434.801NL

PG0434.401NL

PG0434.181NL

0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

200

400

600

700

900

1000

DB (Gauss) where DB = K2DI

1.0

MHz

100

kHz

500

kHz

400

kHz

300

kHz

200

kHz

2.50

300

500

800

100