I'm tired of designing in high voltage and having a lot of spares and components. My method will help get the best performance. I hope those who believe in me will receive good things. when building a class d filterless high voltage system.
[double H Bridge]
[Sorry, the circuit I posted still crashes.]
[double H Bridge]
[Sorry, the circuit I posted still crashes.]
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I'm not sure if the TPA3110D2 is filterless technology, but PAM. is a system that can be absolute no filter and using IR2110 will withstand more high pressure.
CD4000 series are slow. If you run the PAM8610 at 5V you can use 74HC14 inverters which switch much quicker. As it stands the delay in a slow inverter could create shoot-through (bad bad news - that's what often explodes MOSFETs).
I'd also consider a safer half-bridge driver, the IR2110 has no shoot-through prevention. The FAN73832 for instance has tunable dead-time programmed with a resistor. Alas it needs 15V supply though. There are many many half-bridge driver chips out there.
Another thing to be aware of is that the safety features of the PAM8610 won't be able to disable the IR2110 drivers, so if it
detects undervoltage, or has a de-thumping period, there's no guarantee this is passed on to your high voltage bridge - it might just park
it in the wrong state and blow your speakers. Some thought and testing is needed to be sure the main bridge is parked safely if the
PAM shuts down its output drivers in a high-Z state. (ie add some strategically placed pull-up/pull-down resistors etc).
I'd also consider a safer half-bridge driver, the IR2110 has no shoot-through prevention. The FAN73832 for instance has tunable dead-time programmed with a resistor. Alas it needs 15V supply though. There are many many half-bridge driver chips out there.
Another thing to be aware of is that the safety features of the PAM8610 won't be able to disable the IR2110 drivers, so if it
detects undervoltage, or has a de-thumping period, there's no guarantee this is passed on to your high voltage bridge - it might just park
it in the wrong state and blow your speakers. Some thought and testing is needed to be sure the main bridge is parked safely if the
PAM shuts down its output drivers in a high-Z state. (ie add some strategically placed pull-up/pull-down resistors etc).
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I know this technology very well. WARNING: First picture, my circuit is wrong. Do not follow.
my newly edited picture can actually be used.
my newly edited picture can actually be used.
