dspic30F2023在低频PWM生成中出现问题

亲爱的各位，问候！我们使用的是DSPIC30F2023控制器，用于交错Buck变换器和Boost应用。我们需要2.5 kHz相移脉冲（交织）用于巴克以及Boost应用。为了使用PSPWM模块，我们需要打开被固定到X32的PLL部分。现在，即使内部快速RC，当PTPER值超出范围时，我们也不能够产生脉冲。我们能用什么方法来产生这些脉冲。我们还使用了低频CR。在HS+PLL模式下用StAR（2MHz）来完成任务。该设备支持2MHz晶体，因为我们无法在文件中找到这个信息与我们。您的支持是高度赞赏。谢谢和问候，Shrikant Lokhande



      以下为原文

    Dear All,

Greetings!!

We are using dspic30F2023 controller for interleaved Buck converter and Boost applications.
We require 2.5 KHz phase shifted pulses (interleaved) for the Buck as well as for Boost application. To use PSPWM modules we need to turn On the PLL section which is fixed to x32.
Now even with the internal fast RC we are unble to generate the pulses as the PTPER value goes out of range.
Is there any way with which we will be able generate these pulses.

We have also though of using a low frequency crystal (say 2MHz) in HS + PLL mode to get the things done. Do the device support 2MHz crystal as we couldn't find this info in documents available with us.


Your support is highly appreciated.

Thanks and Regards,
Shrikant Lokhande