Coilcraft GA3544 Flyback Transformer for TI UCD3K Digital Power Controller
Inductor Finders Power  |   RF
Power Magnetics Tools
RF Inductor Tools
CM Choke \ Ferrite Beads
LC Filter Designer
IC / Inductor Match Tool
Application Notes
Other Resources
Designer's Kits

Flyback Transformer for
TI UCD3K Digital Power Controller

  • Specified by Texas Instruments for use in the Bias Power Supply for their UCD3K Digital Power Controller
  • Designed to meet UL/CSA/IEC 60950 Reinforced Insulation Class; 3 mm creepage/clearance
  • Isolation: 3000 Vrms, one minute Pri and P1 to S1 and Sense; 1500 Vrms all windings to core
  • Universal input; 5 Watt output
  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over copper terminations


Part number
Click to get parts
at 0 A1
±10% (mH)
at Ipk2
min (mH)
DCR max3
max (µH)
Turns ratio
Pri : S1 : P1 : Sense
GA3544-BL 2.3 1.61 0.860 (pri)
0.131 (P1)
0.109 (S1)
0.155 (Sense)
17.6 1 : 0.158 : 0.158 : 0.079 0.3 12 V, 0.2 A
(S1 and P1)
1 Inductance is measured at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B impedance analyzer or equivalent.
2 Ipk: Peak primary current drawn at minimum input voltage.
3 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Leakage inductance is for the primary and is measured with the secondary winding shorted.
5 Ambient temperature range: −40°C to +85°C
6 Storage temperature range: Component: −40°C to +85°C
Packaging trays: −40°C to +80°C
7 Isolation (hipot): 3000 Vrms, one minute Pri and P1 to S1 and Sense; 500 Vrms, one minute windings to core
8 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Your comments and suggestions are welcome. Contact [email protected]
Copyright © 2020, Coilcraft, Inc.   Privacy policy
Updated: April 16, 2018