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IGBT Forum Discussions

User17676
Level 1
10 questions asked 5 questions asked First question asked
Level 1
The data sheet of the IKW15N120H3 shows switching losses only. Can I use this device in an amplifier circuit?
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Giuseppe_De_Fal
Moderator
Moderator 10 solutions authored 10 replies posted 10 sign-ins
Moderator
Hi Franz,
conduction losses of the IGBT can be calculated based on the output characteristic that is shown in Figure 5 (Tj=25°C) and Figure 6 (Tj=175°C).

In any case you should be very careful in using this device in an amplifier circuit because this IGBT is intended to operate in switched operations (Class D amplifiers) and it is not recommended in linear operations (Class A, AB amplifiers). This is because the IGBT shows an instable thermal behavior when it is driven with VGE<9V (as you can see in Figure 7 of the datasheet).

Best Regards,
Giuseppe

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Giuseppe_De_Fal
Moderator
Moderator 10 solutions authored 10 replies posted 10 sign-ins
Moderator
Hi Franz,
conduction losses of the IGBT can be calculated based on the output characteristic that is shown in Figure 5 (Tj=25°C) and Figure 6 (Tj=175°C).

In any case you should be very careful in using this device in an amplifier circuit because this IGBT is intended to operate in switched operations (Class D amplifiers) and it is not recommended in linear operations (Class A, AB amplifiers). This is because the IGBT shows an instable thermal behavior when it is driven with VGE<9V (as you can see in Figure 7 of the datasheet).

Best Regards,
Giuseppe
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