为什么TDA7498E应用电路在输出端有肖特基二极管但TDA7498没有？

嗨ST。关于TDA7498和TDA7498E的应用，我有几个问题。
TDA7498E应用电路在输出端有肖特基二极管，但TDA7498没有，有这样的原因吗？
由于音圈和交叉网络的组合电感约为4mH，我想要驱动的扬声器设计具有高电感。你能协助计算缓冲电路的C和R的正确值吗？我的低通滤波器基于6欧姆滤波器值（由于扬声器阻抗下降）。数据简报以330pF和22R为起点，我怀疑我需要与此不同。
扬声器系统是8欧姆系统，但最小阻抗为4.9欧姆。我更好地将PCB改为使用TDA7498而不是TDA7498，从可靠性的角度来看，IC更好。
该设计旨在尽可能可靠，从0.4K / W散热器开始，以保​​持封装冷却。
谢谢，
马库斯



以下为原文






Hi ST.  I have a few questions regarding the application of the TDA7498 and TDA7498E.

The TDA7498E application circuit has schottky diodes on the output but the TDA7498 does not, is there a reason for this?

The loudspeaker design I am wanting to drive has high inductance due to both the voice coil and crossover network with a combined inductance of approximately 4mH.  Can you assist in calculating the correct values for C and R for the snubber circuit.  I am basing my low pass filter on the 6 ohm filter values (due to speaker impedance dips).  The data brief says 330pF and 22R as a starting point, I suspect I need to differ from this.

The loudspeaker system is an 8 ohm system but has a minimum impedance of 4.9 ohms.  Is it better for me to change my PCB to use the TDA7498E instead of the TDA7498 and from a reliability point of view which IC is better.  

The design is intended to be as reliable as practically possible starting with a 0.4K/W heatsink to keep the package running cold.

Thanks,

Marcus