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附件为28070调试问题,和芯片外围参数。测试限流PLIMT功能时出线不稳定,请TI提供技术支持。

1用于.6.6KW的28070峰值电流限制设置Vs=3.6V(R.PK1=10K;R.PK2=15K),限制电流为28A。调试时将Vs设置为1.52V(R.PK1=15K;R.PK2=5.1K),限制电流为11A。调试时出现次谐波震荡,震荡结束时电感电流有略微上翘。

2当负载1100W峰值电流限制时,输出电压没有下降,继续加载到1250W依旧没有下降。