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TPS62840: TPS62840DLC: Stop mode

Part Number: TPS62840

Hi, I have a question regarding the TPS62840DLC.

When stop pin and EN pin are high and the output voltage(Vout) is 0.5V lower than the set output voltage, whether the stop mode  will be blanked, and the chip will start to switch again to ensure that Vout is clamped to about 0.5V below the set output voltage?

Thanks.

  • Hi

        不太明确你的意思,是在stop mode下,输出电压异常偏高吗?

  • Hi

    麻烦问一下,若 TPS62840DLC的Stop pin置高后,芯片内部停止开关,但此时若输出负载不为零,输出电压会被负载拉低。当输出电压低于(输出设定值-0.5V)时,芯片理论上会如何动作?此时,芯片是否会重新开始开关以避免输出电压跌落到(输出设定值-0.5V)以下?

  • HI

      我的理解stop模式下,芯片内部switcher关闭后因为输出电容电荷而保持到0.5V左右,这个电压不足以启动负载(负载并非纯电阻式的消耗),所以不会导致芯片后续断续启动维持0.5V的电压。(之所以这样认为,是因为一般芯片设计,即便做出这个模式,但是在没有启动负载的情况下,不断的重启是要做消耗的,我觉得这个没有意义)