Document 130
Base/Gate Driver Transformers
• Lower cost than toroidal equivalents
• Frequency range of 10 - 250 kHz and up
• Industry standard pin centers
• VDE, IEC, UL, CSA compliant
• 3750 Vrms isolation between windings
• Constructed with UL approved Class 130°C insulation
system (UL File E83628)
Turns ratio (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
SD250-2L
1 : 1.5
1.5 mH
4.0 µH
0.4
375 V-µsec
50 pF
2.5
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)
5
Sec
6
SD250-3 and 250-4
7
1
5
Sec 1
6
10
Pri
(drive)
1. Measured at 1 Vrms, 15.75 kHz.
2. Operating temperature range –40°C to +85°C.
3. Electrical specifications at 25°C.
Sec 2
9
Recommended
board layout
1
5
5
0.75
19,05
1
0.950
max
24,13
1.10
max
27,94
0.395
max
10,03
0.62 ±0.015
15,75 ±0,38
6
10
9
7
6
7
9
10
0.15 ±0.030
3,81 ±0,762
0.032
dia ref
0,813
1.10
max
27,94
0.20
5,08
0.40
10,16
0.80
20,32
0.044
dia
1,12
Weight:
Termination:
Packaging:
15.6 – 16.8 g
Tin-silver over tin over copper
49 per tray
Pins 7 and 9 are not present
on SD250-1 and SD250-2
Specifications subject to change without notice.
Please check our website for latest information.
Document 130
Revised 10/26/06
© Coilcraft, Inc. 2006
COILCRAFT [ Coilcraft lnc. ]
