SD250-1L_15 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Base/Gate Driver Transformers

Document 130 -1
Base/Gate Driver Transformers
• Lower cost than toroidal equivalents
• Frequency range of 10 – 250 kHz and up
• Industry standard pin centers
• 3750 Vrms, one minute isolation (hipot) between
primary and secondary windings; 1500 Vrms, one
minute between secondaries
• UL1446 Class B (130°C) Insulation System
(UL File E83628)
Coilcraft Designer’s Kit No. P404 contains samples of four
standard driver transformers.To order, contact Coilcraft or
visit http://order.coilcraft.com to purchase on-line.

Turns ratio ±3% (pri^ :^ sec)
Primary winding
Inductance (min)¹
Leakage inductance (max)¹
DCR
Volt-time product
Secondary winding(s)
Capacitance, pri to sec (max)
DCR, each section (max)
SD250-1L
1:1
1.5 mH
4.0 µH
0.4^ 
375 V-µsec
50 pF
0.75^ 
1. Measured at 1 Vrms, 15.75 kHz.
2. Operating temperature range –40°C to +85°C.
3. Electrical specifications at 25°C.
SD250-2L
1 : 1.5
1.5 mH
4.0 µH
0.4^ 
375 V-µsec
50 pF
2.5^ 
0.950 _max
24,13
Notch
indicates
1
pin 1
0.395
10,03
max
SD250-3L
1:1:1
1.5 mH
4.0 µH
0.4^ 
375 V-µsec
50 pF
0.75^ 
SD250-4L
1 : 1.5 : 1.5
1.5 mH
4.0 µH
0.4^ 
375 V-µsec
50 pF
2.5^ 
SD250-1 and 250-2
1
10
Pri
(drive)
Sec
5
6
SD250-3 and 250-4
7
1
Pri
(drive)
5
Sec 1
6
10
Sec 2
9
5
1.10
27,94
max
Recommended
board layout
0.75
19,05
5
1
0.62 ±0.015
15,75 ±0,38
0.15 ±0.030
3,81 ±0,762
0.032
0,813
dia
ref
Weight:
15.6 – 16.8 g
Termination: Tin-silver over tin over copper
Packaging: 49 per tray
10 9
76
1.10
27,94
max
6
0.20
5,08
7
9
0.40
10,16
0.80
20,32
10
01.0,1424dia
Pins 7 and 9 are not present
on SD250-1 and SD250-2
Document 130-1  Revised 04/20/12