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www.pulseeng.com 50 SPM2007 (7/09)
SMT POWER INDUCTORS
Power Beads - PA0766NL Series
Two independent inductors integrated into a single package
Less board space and lower cost than two separate inductors
Ideal for multi-phase and single phase applications
Current Rating: 76Apk
Inductance Range: 148nH to 1140nH
Footprint: 14.0 x 13.5mm Max
Height: 7.0mm Max
Dual Phase Integrated Inductor Specifications for Multi-phase Systems
2
Inductance
Inductance
1
Heating
7
Part @Irated
Irated
5
DCR/phase
2,3
@0ADC
Saturation Current
6
Current
Number
(nH TYP)
(ADC)
(mW)
(nH ± 20%)
(Ad c )
(Ad c )
L1 L2 L1 L2 L1 L2
L1 L2
L1 L2
L1 L2
PA0766.281NLT 285 285 26 26 296 296 38 38
PA0766.341NLT 325 325 26 26
0.75 0.75
352 352 31.5 31.5
26 26
PA0766.421NLT 395 395 25 25 435 435 25 25
PA0766.561NLT 495 495 18.5 18.5 568 568 18.5 18.5
Electrical Specifications @ 25°C — Operating Temperature -40°C to +130°C
10
Single Phase Inductor Specifications for Series and Parallel Connections
1
Part Inductance @Irated Irated
5
DCR
2,3
Inductance @0ADC
1
Saturation Current
6
Heating Current
7
Connection
Number (nH TYP) (ADC) (mW) (nH ± 20%) (Ad c ) (Ad c )
PA0766.281NLT 148 52 148 76
PA0766.341NLT 160 52
0.38
176 63
52 Parallel
PA0766.421NLT 180 50 218 50
PA0766.561NLT 240 37 284 37
PA0766.281NLT 635 26 592 38
PA0766.341NLT 700 26
1.50
704 31.5
26 Series
PA0766.421NLT 770 25 870 25
PA0766.561NLT 1000 18.5 1140 18.5
NOTES:
1. Inductance is measured at 500kHz, 100mVrms.
2. The PA0766 consists of two separate and independent inductors inte-
grated into a single package. The two inductors can be used for two
separate phases within dual output or multi-phase application or they can
be connected in series or parallel to form a single inductor within a single
phase application.
3. The nominal DCR has a tolerance of ±9%. This tolerance is guaranteed
by design, but is not a manufacturing production test. The nominal DCR
is measured from point a to point b , as shown below on the mechanical
drawing.
4. For manufacturing production test, a maximum DCR value of 0.9mW per
phase is used.
5. The rated current as listed is either the saturation current or the heating
current depending on which value is lower.
6. The saturation current is the current which causes the inductance to drop
a maximum of 26% from the nominal inductance at 0Adc at the stated
ambient temperatures (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.
7. The heating current is the DC current which causes the part temperature
to increase by approximately 40°C. This current is determined by solder-
ing the component on a typical application PCB, and then applying the
current to the device for 30 minutes.
8. In high volt*time applications, additional heating in the component can
occur due to core losses in the inductor which may neccessitate derat-
ing the current in order to limit the temperature rise of the component. To
determine the approximate total losses (or temperature rise) for a given
application, the coreloss and temperature rise curves can be used.
9. Pulse complies with industry standard tape and reel specification EIA481.
10. The temperature of the component (ambient plus temperature rise) must
be within the stated operating temperature range.
