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TIDA-010062: TIDA-010062的PFC部分疑问

吹过的风
Prodigy 10 points
Part Number: TIDA-010062

上午好，

         关于TIDA-010062的PFC部分里面，对PID的输出值取了绝对值，如果PID输出值为负数时，对负数取绝对值，那是不是变成正反馈，那是不是会出问题；比如在异常状态的时候，电流没有即时爬不起来，这时候对于下管来说，D应该是增大的，但由于取了绝对值，D反而会减少。

dutyPWMReg = (uint32_t)((float32_t)(TTPLPFC_PFC_PWM_PERIOD

                                        / 2.0f) * fabsf(duty));