SI82390AD-IS Datasheet, PDF (14/38 Pages) Silicon Laboratories – 4.0 A ISODrivers with 2.5 V VDDI and Safety Features

3. Applications
The following examples illustrate typical circuit configurations using the Si8239x.
3.1 High-Side/Low-Side Driver
The following figure shows the Si82394/8 controlled by a single PWM signal.
Si8239x Data Sheet
Applications
Figure 3.1. Si82394/8 in Half-Bridge Application
In the above figure, D1 and CB form a conventional bootstrap circuit that allows VOA to operate as a high-side driver for Q1, which has
a maximum drain voltage of 1500 V. VOB is connected as a conventional low-side driver. Note that the input side of the Si8239x re-
quires VDDI in the range of 2.5 to 5.5 V, while the VDDA and VDDB output side supplies must be between 6.5 and 24 V with respect to
their respective grounds. The boot-strap start up time will depend on the CB cap chosen. Also note that the bypass capacitors on the
Si8239x should be located as close to the chip as possible.
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