Other Parts Discussed in Thread: TPS562209
Ti专家你们好:
最近用了一款电源芯片,使用控制模式为d-cap模式,看datasheet说,shot time 时间与输入电压成正比,与输出电压成反比,但是我看介绍dcap控制模式的文档里面的原理图发现,应该与上面所说情况相反,这点比较迷惑,这个shot time 是固定的吗?上面说是自适应,但是你们公司介绍工作原理的视频说是固定的,这也有点迷惑,能否详细介绍一下相关工作原理。谢谢!
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你好,
The adaptive on-time control adjusts the on-time to be inversely proportional to the input voltage and proportional to the output voltage。
频率不变时,输入电压高,占空比小,开通时间变短,所以与输入电压成反比,谢谢。