Actel Fusion Mixed-Signal FPGAs
CGS is not a fixed capacitance but, depending on the circuitry connected to its drain terminal, can
vary significantly during the course of a turn-on or turn-off transient. Thus, EQ 2-6 on page 2-94
can only be used for a first-order estimate of the switching speed of the external MOSFET.
1 µA
3 µA
10 µA
30 µA
AG
High
Current
1 µA
3 µA
10 µA
30 µA
Figure 2-75 • Gate Driver Example
Preliminary v1.7
2-95