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Document 268
Flyback Transformer – U6939-CMicreFl MorICus3e8Cw4itxhfamily
This product is not RoHS-compliant. Contact Coilcraft
Schematic
for current status or possible alternatives.
18
This transformer has been specially designed to meet the requirements of Micrel’s MIC38C4x family of BiCMOS current-mode PWM controllers.
C
Pri Sec
27 3
Ter
Free evaluation samples can be requested by contact-
D
4
ing the Coilcraft sales office nearest you.
Recommended
Board Layout
Part
Inductance1 DCR max
number ±8% (µH)
(Ohms)
Isolation (Vrms)
A
E
U6939-C
380
(1-2) 0.580 (1-7,core) 2500
4
5
(3-4) 0.120
(1-3) 500
F
(7-8) 0.011 (3,7-core) 500
B
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.
U6939-C Datasheet
