Zetex - AN23 - Zetex SPICE models - understanding ... - Diodes, Inc.
Zetex - AN23 - Zetex SPICE models - understanding ... - Diodes, Inc.
Zetex - AN23 - Zetex SPICE models - understanding ... - Diodes, Inc.
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<strong>AN23</strong> - 18<br />
Application Note 23<br />
Issue 2 March 1996<br />
Figure 15<br />
Complementary Emitter Follower MOSFET Gate Driver using ZTX618/718. (Note 1).<br />
Complementary Emitter Follower<br />
MOSFET Gate Driver. A high current<br />
buffer is often required to supply the<br />
high transient currents demanded by<br />
Power MOSFETs operating at high<br />
switching speeds, say within off-line<br />
converters. This buffer is used to<br />
interface the power devices to the PWM<br />
controller IC which may have limited<br />
current source/sink capability. Figure 15<br />
shows a conceptual circuit of a typical<br />
gate driver pair using the high gain 3A<br />
DC rated transistors ZTX618 and<br />
ZTX718. Figure 16 shows the gate<br />
voltage waveform, and the total gate<br />
charging current for a pair of power<br />
MOSFETs.
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