SMT POWER INDUCTORS
Flat Coils - PG0437NL 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, 100°C, or the heating current.
4. The saturation current, I
SAT
, is the current at which the
component inductance drops by 20% (typical) at an ambient
temperature of 25°C and 100°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.
5. The heating current, I
DC
, is the DC current required to raise the
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:
Core Loss
= K1 * (f)
1.12
* (K2ΔI)
2.17
Where: Core Loss
= in Watts
K1=
8.74E-11
f
= switching frequency in kHz
K1 & K2
= core loss factors
Δ
I
= delta I across the component in Ampere
Δ
K2ΔI
= one half of the peak to peak flux density
across the component in Gauss
7. Unless otherwise specified, all testing is made at
100kHz, 0.1V
AC
.
8. Optional Tape & Reel packaging can be ordered by adding a "T"
suffix to the part number (i.e. PG0437.401NL becomes
PG0437.401NLT). Pulse complies to industry standard tape and
reel specification EIA481.
Typical Inductance vs DC Bias
700
@ 25°C
INDUCTANCE (nH)
PG0437.601NL
PG0437.451NL
PG0437.401NL
PG0437.321NL
700
600
500
400
300
200
100
PG0437.451NL
@ 100°C
PG0437.601NL
INDUCTANCE (nH)
600
500
400
300
200
100
0
0
10
PG0437.401NL
PG0437.321NL
20
30
DC BIAS (A)
40
50
60
0
0
10
20
30
DC BIAS (A)
40
50
60
Typical Core Loss vs Peak Flux Density
1.60
1.40
1.20
500
kHz
400
kHz
300
kHz
1.0
MHz
CoreLoss (W)
1.00
0.80
0.60
0.40
0.20
0.00
500
750
1000
200
kHz
100
kHz
1250
1500
1750
2000
2250
2500
2750
3000
DB
(Gauss)
where
DB
= K2DI
USA 858 674 8100
•
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•
Singapore 65 6287 8998
•
Shanghai
86 21 54643211 / 2
•
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•
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59
SPM2007 (11/07)
51mcu
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