06.05.2019, 02:40 PM
(Dieser Beitrag wurde zuletzt bearbeitet: 06.05.2019, 02:43 PM von 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.
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.