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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

Gate Drive Transformer

Gate drive transformers are used to deliver the controlling gate-voltage pulses between the drain and source of a MOSFET, while providing isolation between the MOSFET and the controlling drive circuit. Gate-driver circuits need an isolated (floating) bias supply to maintain the required turn-on bias when the FET source rises to the input voltage. A gate drive transformer isolates the controlling gate-drive circuit from the switch node when driving the MOSFET gate and may also scale the output voltage via an appropriate primary-to-secondary turns ratio.
 
Coilcraft’s off-the-shelf gate drive transformers simplify the design of your gate-drive circuit and shorten design cycle time. Our designs typically utilize high-permeability ferrite cores to maximize magnetizing inductance and minimize magnetizing current. The required transformer size is determined by the volt-time product of the application. Therefore the first selection criterion for a gate drive transformer is the volt-time product (V-µsec) rating as shown on the transformer datasheet. This must be greater than or equal to the highest applied voltage-time product expected to avoid core saturation.
 
Check out our Guide to Gate Drive Transformers for a more detailed discussion of gate drive transformers.
Turns
ratio
Volt-time
product
(Vµs)
Isolation Part
number
Click for data
Primary
inductance
DCR
Pri (Ω)
DCR
Sec (Ω)
Leakage
L
(µH)
Mtg L × W × H (mm)
Mouse over for relative size
1 : 1 25.8 1500 Vdc DA2319-AL 296 µH 0.795 0.655 1.5 SM 8.2 × 6.6 × 5.4
34.2 2250 Vdc FA2659-AL 296 µH 0.795 0.655 1.5 SM 7.85 × 7.25 × 7.0
221 1500 Vrms DA2099-AL 3.75 mH 2.30 2.85 13 SM 13.0 × 11.5 × 6.5
375 3750 Vrms SD250-1L 1.5 mH 0.40 0.75 4.0 TH 27.94 × 27.94 × 24.13
1.25 : 1 20.0 1500 Vdc CV9052-AL 931.5 µH 1.03 0.850 0.90 SM >10.92 × 10.16 × 3.0
1.5 : 1 40.8 1500 Vdc DA2318-AL 680 µH 1.65 0.860 4.0 SM 8.2 × 6.6 × 5.4
1 : 1.5 375 3750 Vrms SD250-2L 1.5 mH 0.4 2.5 4.0 TH 27.94 × 27.94 × 24.13
1 : 1 : 1 24.5 1500 Vdc DA2320-AL 264 µH 1.50 1.50
1.50
0.3 SM 8.2 × 6.6 × 5.4
150 3000 Vrms HA3858-AL 460 µH 0.380
0.472
0.424 1.87
2.06
TH 17.15 × 16.51 × 8.89
165 3000 Vrms GA3550-BL 460 µH 0.410
0.475
0.440 1.15
1.25
SM 17.4 × 17.0 × 10.0
375 3750 Vrms SD250-3 1.5 mH 0.40 0.75
0.75
4.0 TH 27.94 × 27.94 × 24.13
2 : 1 : 1 24.5 1500 Vdc DA2317-AL 330 µH 1.4 0.65
0.79
0.5 SM 8.2 × 6.6 × 5.4
1 : 1.5 : 1.5 375 3750 Vrms SD250-4L 1.5 mH 0.40 2.5
2.5
4.0 TH 27.94 × 27.94 × 24.13

Can these transformers be used in different applications or topologies?