I’m using the mentioned device in a typical gate drive circuit. If the voltage switched by the actuated half-bridge exceeds 85V, the DC-DC converter seems to stop clocking for about 600ns (t1) which results in a voltage drop on the Viso output (measurement between pin 16 and 15; purple curve).
The driver output (measurement between pin 12 and 14; red curve) does also behave very unpredictable.
What can affect the dc-dc converter to stop operating?
When the converter starts clocking again (t2), the driver output behaves very crazy; looks a little bit like a high impedance state.
Why does the driver output behave like that? Is this normal?
The Circuit is realized like advised in the datasheet.