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【網友提問】
The features a constant off-time control
scheme. The Housekeeping provides a bandgap
reference used to control the output voltage.
When the voltage at the FB pin is less than trip
point, the input comp amplifier enables the
device and the NMOS switch is turned on
pulling the SW pin to ground. When the NMOS
switch is on, current begins to flow through
inductor L while the load current is supplied by
the output capacitor Cout. Once the current in the
inductor reaches the current limit, the CL Comp
trips and the timer turns off the NMOS switch.
The inductor current will now begin to decrease.
At the same time, the energy stored in the
inductor transferred to Cout and the load. After
the 400ns off time the NMOS switch is turned on
and energy is stored in the inductor again.
When FB reaches the trip point, the input comp
amplifier then disables the device and turns off
the NMOS switch. The SHND pin can be used to
turn off the device. In the shutdown mode the
output voltage will be a diode drop lower than the input voltage.

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【最佳解答】

你好!以下是我的翻譯! 特點一份恆定的經常的控制計劃。家務提供bandgap 參考使用控制產品電壓。當電壓在FB 別針比旅行點是較少, 輸入comp 放大器使能設備並且NMOS 開關被轉動在拉扯SW 別針對地面。當NMOS 開關打開, 潮流開始流經感應器L 當裝載潮流由產品電容器Cout 供應。潮流在感應器一次到達當前的極限, CL Comp 旅行並且定時器關閉NMOS 開關。感應器潮流現在將開始減少。同時, 能量被存放在感應器轉移了到Cout 和裝載。在4……