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LM5145: Power management forum

Part Number: LM5145

Tool/software:

  • 8.3.2 Output Voltage Setpoint and Accuracy (FB)The reference voltage at the FB pin is set at 0.8 V with a feedback system accuracy over the full junctiontemperature range of +1%. Junction temperature range for the device is - 40°C to +125'C. While dependent onswitching frequency and load current levels, the Livi5t45is-generally capable of providing output voltages in thebr slightly less than Viwhichever is lower. The DC output voltagerange of0.8Vto amaximum of 60 Vsetpoint during normal operation is set by the feedback resistor network, RrBt and RrB2, connected to theoutput.

    您好,有个问题可以帮确认下吗?我们有在用LM5145这颗 buck的DC-DC controller,看datasheet中FB这这边有这样的描述我可以理解成,当设置的输出电压高于输入电压时,反馈电阻设置的就无效,以接近输入电压的最高输出电压输出嘛?或者比如12V输入,FB配置的电压是13V,实际输出电压可能是11V,正常使用有没有风险?