how high PWM frequency can produce tms320f28027 for 16bit resolution? Actually 16bit is not enough in 2018, at least 24bit needed.. If tms320f28027 has no noise-shaper, which used in tas5558 to obtain high resolution at 384kHz carrier(there is low bit timer adjusted with noise-shaper for every cock), I've doubt about tms320f28027 has a chance even for 16 bit resolution for 384kHz PWM.
ok, I'll try to translate my Q by google:
PWM频率有多高可以产生tms320f28027 16位分辨率？ 实际上，在2018年16位是不够的，至少需要24位。如果tms320f28027没有噪声整形器，它在tas5558中用于在384kHz载波上获得高分辨率（对于每个旋钮都有用噪声整形器调整的低位定时器），I 对于tms320f28027对于384kHz PWM的16位分辨率有疑问。
wow, tms320f28027 at least $3-4 or 20RMB, is there any reason for so complicated SMPS? Do you planing to implement audio modulated rails of your SMPS?
PS: I using stm8s003f3 for 1RMB/pcs to control LLC SMPS, including all types of protections, softstart and such regulation dynamic what I need for audio amp.
I recollect my old project on the stm8s003f3 Qi wireless charger, where STM8 MCU 1RMB/1pcs communicate with smartphone thru the air transformer and provides regulation according that communication. BTW, it was resonant LLC topology as well. So it was stm8s003f3 + 4 SOT23 mosfets and PCB coil as the secondary winding of air transformer. Strange right, no any TMS320, but with some digital filtering yet ;) https://yadi.sk/i/o8UgLcQX3Trrig
楼主
发表于 2018-3-23 15:56
