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TLE2426 rail splitter higher current source/sink than 20mA alternative?

Other Parts Discussed in Thread: TLE2426, OPA2192, BUF634

Hi All,

I require a chip equivalent to TLE2426 with a higher current source/sink capability. The TLE2426 has 20mA source and sink capability.

Could you suggest me for 30mA current requirement?

Can I use 2 of such TLE2426 chips and tie the pins in parallel? Would that work? Is it a good engineering decision?

Best regards,

Harshang

  • Hi Harshang,

    We worked on a circuit a few weeks ago that uses an OPA2192 with both outputs operating in parallel to deliver greater than +/-30mA output current to a capacitive/resistive load in a supply-splitter application. We could modify this circuit to meet your circuit requirements but we'll need to know a little more information about this application. Please let us know the following:

    1.) Supply voltage and desired output voltage (i.e. V+ = 10V, V- = 0V, Vout = 5V)
    2.) The exact value *(or range) of capacitance that will be placed on the output of the op amp.
  • Hi Collin,

    Thanks for your reply.

    All I want to drive is an LED with 25mA current. Also An Op-amp in voltage follower config will be there, but this will have negligible current. I could also use BUF634 instead of an op-amp in voltage follower config. 

    So, I can use 2 of the rail splittersTLE2426 in parallel, or use a rail splitter followerd by BUF634 which will drive the LEL and then will come another BUF634 as a voltage follower stage.

    Driving the LED is essential with virtual ground due to other things we'd like to do with this circuit which I am not mentioning here.

    We can discuss this in detail on the phone today if you have time.

    -Best regards,

    Harshang Shah

  • Hi Harshang,

    You can use the BUF634 with an external resistor divider to perform the function that would be achieved with the TLE2426+BUF634.  An application example of this circuit is shown in the BUF634 datasheet, which I've pasted below.