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Hello, everyone, let's talk about the enable signal

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The enable signal is often called EN, or enable

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It is also called ON, OFF, or disable

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It is also called SHUTDOWN in some schematics

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This EN is short for enable

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If there is no # sign, it means that the high level is valid

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When it is high level, it is on;

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when it is low level, it is off

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If it is marked with a #, it means that the low level is valid

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When it is low level, it is on; when it is high level, it is off

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For example, this SHDN#, SHDN means off

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With # is valid for low level, low level means OFF, high level means ON

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High and low levels need to be understood in combination with their signal names

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The following chip, VR6101

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Its 4th pin is an EN signal,

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the chip wants to work, first need to get power,

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and then get the enable signal of high level

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Because the EN does not have a # sign, the high level is valid

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When it gets an enable signal of high level,

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it outputs power from the OUT pin

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Without this EN signal,

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the chip will not work and the OUT pin will not output power

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That's what the enable signal does, it's like a switch

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Okay, that's the enable signal