Q3903-AL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Toroidal Transformer

Document 616
Toroidal Transformer – Q3903-AL
• Specified by ON Semiconductor for use with their NCP1605
PFC Controller. Referenced as X25, pulse transformer on
evaluation board NCP1605FORWGEVB and Application
Note AND8292.
• Recommended by Texas Instruments for use with their
UC3875 Phase Shift Resonant Controller.
• Three 1 : 1 windings
• 500 Vrms winding-to-winding isolation.
Core material Ferrite
Terminations RoHS compliant tin-silver over tin over nickel over
brass. Other terminations available at additional cost.
Weight 4.3 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
Packaging: –40°C to +80°C
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 49 per tray
PCB washing Only pure water or alcohol recommended
Inter-winding
Notch indicates pin1
1
Part
Inductance¹ DCR max²
isolation
number
min (µH)
(Ohms)
(Vrms)
1
6
Q3903-AL
210
0.090
500
2
1. Inductance measured between pins 1 and 6, at 15.75 kHz, 0.015 Vrms,
3
0.65
5 _16,51
6
4
2
0 Adc using an Agilent/HP 4192A impedance analyzer.
2. DCR is per winding, measured on Cambridge Technology micro-
0.72
ohmmeter or equivalent.
18,29
5
3. Electrical specifications at 25°C.
0.95
3
24,13
0.01256 × 0.30
0,319 × 0,75
1
0.475
12,07
0.19 ± 0.02
4,83 ± 0,51
0.140
3,56
6
4
1:1:1
3
4
0.051
0.638
1,3
16,21
Recommended
PC Board Layout
Dimensions are in
inches
mm
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 616 Revised 05/27/09