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Author Topic: PSU CV CI Howland  (Read 721 times)

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Online iMoTopic starter

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PSU CV CI Howland
« on: March 04, 2019, 06:50:39 pm »
This is follow up of the topic Zero999 has started here:
https://www.eevblog.com/forum/beginners/0-30v-0-3a-psu-audiogurus-version/msg2240139/#msg2240139

It is a pretty interesting schematics, needs some elaboration however, therefore let us continue here.
The voltage and current could be set via DACs easily.


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Re: PSU CV CI Howland
« Reply #1 on: March 04, 2019, 06:54:30 pm »
And the ADI stability test (with lower values in dividers).
« Last Edit: March 04, 2019, 07:01:06 pm by imo »
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Re: PSU CV CI Howland
« Reply #2 on: March 04, 2019, 07:20:17 pm »
Transient with switching Rload 10ohm/1ohm, Cload made of 3 capacitors, Vout=15V, current limit=2A, OP27.
« Last Edit: March 04, 2019, 07:23:02 pm by imo »
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Re: PSU CV CI Howland
« Reply #3 on: March 04, 2019, 07:36:41 pm »
Stability with OP27. A perfect oscillator. Phase margin close to 0deg.
Interestingly in transient with the Iload switching 1.5A/15A there are no oscillation visible. Hmm.
« Last Edit: March 04, 2019, 08:01:28 pm by imo »
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Re: PSU CV CI Howland
« Reply #4 on: March 04, 2019, 08:18:10 pm »
Constant load 5ohm, switching Vset 0.5/2.0V for Vout 5V/20V while I_limit is 2A. Nice, except a small transient at the rising edge of the Vout and I(R_Load).
« Last Edit: March 04, 2019, 08:28:28 pm by imo »
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