RCL question???

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5150ed

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Joined 2005
Is the resistor current limit is only a common resistor or a resistor with coil?
 

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glennb

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5150ed said:
Is the resistor current limit is only a common resistor or a resistor with coil?
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Your image is from the Burr-Brown OPA541 datasheet. The opening paragraph of the datasheet makes it quite clear:
"Internal current limit circuitry can be user-programmed with a single external resistor, protecting the amplifier and load from fault conditions."
Page 6 describes the feature in detail.
 
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glennb

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home.pacific.net.au/~gnb/audio/
On further examination, it looks like someone has doctored an image cut from the datasheet, added the R1/C1 Zobel network and removed the 'External' caption from below RCL.

The datasheet does not refer to using a Zobel, so RCL does not include the resistance of a coil (inductor).

I would put a Zobel (whether R/C or R/L/C) *after* RCL, so that it is more closely associated with the load.
 
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