Recently I purchased a TAS5548EVM evaluation module for testing the capabilities of the TAS5558 in order to enable a possible implementation in a class-D audio amplifier as yet under development.
In a current setting of the class-D amplifier I make use of a CPLD to protect the discreet switching power output stage from being malfunctioning in case the time between a rising and a falling edge or contrariwise of an incoming PWM signal is less than 100ns including glitches.
Furthermore it is most important for the application, that a PWM output of the TAS5558 never stops during power on and therefore in case of a muted or an absence of an incoming signal a 50:50 duty cycle will be provided at all times. This feature is also provided by the CPLD.
Now my question is; does a TAS5558 employ a noise filter that prevents a transient pulse of less than 100ns in duration including glitches (as being set for the modulation limit) from being passed to a PWM output of the TAS5558, in which the TAS5558 will surplus the CPLD improving overall specs, costs, etc.?
Best regards,
Henk
