[alfsch]

Infineon macht mal was Neues: multi-level-d-amp chips... by Merus Audio’s Ultra-Efficient eximo switching amplifier technology. [/font][/size][/color]

https://www.edomtech.com/en/product/ins....dex_id=114

https://www.infineon.com/cms/de/product/...ifier-ics/

https://www.infineon.com/cms/de/product/...s/ma12040/

zb
https://www.infineon.com/dgdl/Infineon-M...50002861a5

   

   

[christianw.]

Hmm.. interessantes Device, auf Siliziumebene scheint aber noch Handlungsbedarf.

https://www.infineon.com/dgdl/Infineon-E...4d8ab40c6f

Description of the issue/limitation:
Hot plugging the PVDD pins can cause damage to the amplifier. Hot plugging can trigger the ESD-cells that are designed for ESD (Electro static discharge) and not the power/energy level of a fast voltage ramp up from power supply.

Workaround:
Make sure that the ramp up voltage stays below 0.25V/μs. This can be controlled by using the soft start function of the power supply or by using a load switch with a controlled ramp up voltage.


Device failure due to in-rush current
Description of the issue/limitation:
It is known that large output in-rush current cannot be handled well by the substrate of the IC. This might result in device breakdown. Large in-rush currents can occur when for example a double / simultaneous short is created at the output in combination with long (> 1m ) speaker cables.

Workaround:
If this is a likely scenario for the application, it is recommended to apply a schottky diode at each output node. This way large in-rush currents are diverted to PCB ground instead of IC substrate.