COILCRAFT U6939-C

Document 268
with
For use
family
C
8
IC3 4x
Micrel M
Flyback Transformer – U6939-C
Schematic
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
This transformer has been specially designed to meet
the requirements of Micrel’s MIC38C4x family of BiCMOS
current-mode PWM controllers.
Free evaluation samples can be requested by contacting the Coilcraft sales office nearest you.
Part
number
U6939-C
Inductance1
±8% (µH)
380
DCR max
(Ohms)
(1-2) 0.580
(3-4) 0.120
(7-8) 0.011
Isolation
(Vrms)
(1-7,core) 2500
(1-3) 500
(3,7-core) 500
1. Inductance is for the primary, measured at 100 kHz, 1.0 Vrms,
0 Adc.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
1
C
Sec
2
3
7
Ter
4
D
Recommended
Board Layout
A
E
5
4
F
B
8
1
0.047
0,12
A max
B max
C max
D nom
E
F
0.710
0.930
0.810
0.280
0.492
0.197
inches
18,03
23,62
20,57
7,11
1,25
1,50
mm
Specifications subject to change without notice.
© Coilcraft, Inc. 2007
8
Pri
Document 268
Revised 9/10/01