Hello,
Sorry for the mistake! Desat is referenced to GND2. I'll send in for a datasheet correction. Both the 9 V reference and the Desat blanking switch connect to GND2.
RSchnell
The ADuM4135 does have good performance, but we have come across cases where short bursts of RF can upset the DESAT operation of the parts causing a premature fault to register. We are working on addressing the issue. We should have an update…
Hi,
I am using the Adum4136 to drive IGBTs in DC-AC converter. The circuits have worked well but I am suffering occassionally damage of Adum4136. When it goes wrong, the fault pin keeps high and the ready pin keeps low. Some of them are damaged when…
I'm designing a motor driver using the ADuM4136.
From the datasheet Table 9, I've noticed that there are some conditions under which the READY and /FAULT pins have "UNKNOWN" states.
Can you explain this a bit more? For instance, if…
I have good and bad news. I've been able to reproduce some of the behavior you have described. Using a 1 Ω resistor, and a 47 nF load to simulate the power devices, operating at ±15 V, I ran a 20 kHz signal with narrow pulse widths of approximately…
Dear Sir / Madam :
I use ACPL-36JT in my Gate drive board design to drive IGBT model; there is DESAT fault problem on switch ringing.
For example:
my High voltage is 270V;
when switching, The switcher collector Pin can go to -10V; then ACPL-36 make…
Hello Chenmj,
As Brian has pointed out, the output voltage swing requirements for your system make the ADuM5230 not a suitable match. Also, let's estimate the power required to operate the gate drive. using total gate charge, we can calculate:
The ADuM7234 provides a means for delivering a higher driver strength signal to the power MOSFET gates, as well as the ability to level shift the highside gate signal. This is done in an isolated fashion, allowing the primary and secondary sides…
Yes, the Vgs voltage relative to the source node can be run negative since GNDa is floating. This is one of the advantages of digitally isolated gate drivers as compared to high-voltage level shifters. The VDDA/VOA/GNDA pins are on one silicon…
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