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TMS320F28035: 参考例程(…\ti\controlSUITE\development_kits\TMDSHVRESLLCKIT_v1.0\HVLLC)移植过程中,PWM3A死区波形部分异常

Part Number: TMS320F28035
Other Parts Discussed in Thread: CONTROLSUITE

1、开发环境

①主芯片:TMS320F28035

CCS版本:11.1.0.00011

③参考TI Demo:…\ti\controlSUITE\development_kits\TMDSHVRESLLCKIT_v1.0\HVLLC

 

2、问题复现

①当开关频率大于250KHz时,PWM1A/BPWM2A波形正常,PWM3A波形异常(※下降沿死区时间内输出未置低);

②当开关频率低于250KHz时,PWM1A/BPWM2APWM3A波形均正常。

3、其它

①PWM1A为LLC半桥上管驱动信号,PWM1B为LLC半桥下管驱动信号,PWM2A和PWM3A为同步整流信号;

②PWM4APWM5APWM5B均为测试引脚。