Document 357-1

Planar Magnetics

For Texas Instruments
UCC3580

This planar transformer and planar inductor pair is designed specifically for the Texas Instruments UCC3580
family of PWM controllers.
The B0392-AL transformer is engineered for use in single
switch, forward topologies operating at 300 kHz. It is ideal
for use in high-current telecom power supply applications
that require high efficiency in a low-profile package.
The main winding of the B0434-AL inductor serves as an
output choke, while the auxiliary winding controls input
current to the PWM.
Request free evaluation samples by contacting Coilcraftor visiting www.coilcraft.com.

Transformer				
OutputPrimaryLeakage		
DCR maxPartOutput
Outputcurrent	 inductance2
inductance3(mOhms)	 number1
power (W)
voltage (V)(A rms)min (µH)max (µH)
B0392-AL_100
3.3
30.0
65.0
0.22
Primary: 13.5							Secondary:	  0.41. When ordering, please specify packaging code:
Packaging:

2. Inductance measured on an Agilent/HP 4284 between pins 1 and 2 at
250 kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 1 and 2 at 100 kHz, 0.1 Vrms,
0 Adc with secondary pins shorted.
4. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

B0392-ALD
D = 13″ machine ready reel. EIA-481 embossed plastic
tape (200 parts per full reel). Quantities less than fullreel available: in tape (not machine ready) or withleader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our partnumbering system, Coilcraft is eliminating the needfor multiple packaging codes. When ordering, simply
change the last letter of your part number from B to D.
0.920
max
23,37B0392-AL

2XXXXY

0.810 max
20,57

3

10.80020,32

10.1253,18

140.2907,370.200
5,08

30.080Ø
2,03Parts manufactured priorto December 2011 may
be marked differently.

SecPri42

42Pri/sec
isolation(Vdc)
1500

6:1
3

Recommended
Land Pattern

0.110
Ø
2,79

0.340 max
8,640.006 /0,15

Dimensions are ininchesmm

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 357-1

Revised 03/27/23© Coilcraft Inc. 2023
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 357-2

Planar Magnetics for Texas Instruments UCC3580
Output Inductor		 Inductance2
Part@ 0 Adc
I rated	 number1(µH)
Adc
B0434-AL_
2.0 ±10%30				

DCR max(mOhms)
Main: 1.9
Aux: 1450.0

1. When ordering, please specify packaging code:
Packaging:

Isat4	 Irms5
(A)
(A)
3836

2. Inductance measured on an Agilent/HP 4284 between pins 3 and 4 at
10 kHz, 0.1 Vrms.
3. Isolation measured from pin 1 to pin 3.
4. DC current at which inductance drops 10% (typ) from its value withoutcurrent.
5. Current that causes a 40°C rise from 25°C ambient.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

B0434-ALD
D = 13″ machine ready reel. EIA-481 embossed plastic
tape (200 parts per full reel). Quantities less than full
reel available: in tape (not machine ready) or withleader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our partnumbering system, Coilcraft is eliminating the needfor multiple packaging codes. When ordering, simply
change the last letter of your part number from B to D.

Typical L vs Frequency

Typical L vs Current
100

Inductance (µH)

100

Inductance (µH)

Isolation3(Vdc)
1100

1010.11010.10.1

101

1000.1Frequency (MHz)0.920max
23,37

XXXXY

0.810 max
20,57
2B0434-AL

10.80020,32
4

3Parts manufactured priorto December 2011 may
be marked differently.

142

30.310
7,87
0.310
7,87
0.060
Ø
1,52

Recommended
Land Pattern

0.360 max
9,15

30.006 /0,15

Dimensions are ininches
mm

Main
4T

1Current (A)10100Core material Ferrite
Terminations RoHS Tin silver over nickel overbrass
Weight 11.1 – 11.5 g
0.250
Ambient temperature –40°C to +85°C
6,35
Storage temperature Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
0.250
6,35
Resistance to soldering heat Max three 40
second reflows at +260°C, parts cooled to room
temperature between cycles
0.090
Ø
2,29
Moisture Sensitivity Level (MSL) 1 (unlimited
floor life at <30°C / 85% relative humidity)
Packaging 200 per 13″ reel Plastic tape: 44mm wide, 0.37 mm thick, 32 mm pocket spacing,
9.4 mm pocket depth
PCB washing Only pure water or alcohol
recommended

41Aux
16T
2

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 357-2

Revised 03/07/23© Coilcraft Inc. 2023
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.