Difference: ElectronicsSandbox (1 vs. 9)

Revision 9
13 Jan 2011 - Main.ClifCox
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META TOPICPARENT name="WebHome"

Electronics Sandbox

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META FILEATTACHMENT attachment="tdc_hpr1xxc.pdf" attr="" comment="Small DC-DC modules" date="1289941668" name="tdc_hpr1xxc.pdf" path="tdc_hpr1xxc.pdf" size="108690" stream="tdc_hpr1xxc.pdf" tmpFilename="/var/tmp/CGItemp35429" user="clif" version="1"
META FILEATTACHMENT attachment="black_12v_clean.png" attr="" comment="My 12V Black converter" date="1289950088" name="black_12v_clean.png" path="black_12v_clean.png" size="30319" stream="black_12v_clean.png" tmpFilename="/var/tmp/CGItemp39053" user="clif" version="4"
META FILEATTACHMENT attachment="black_12v_gaw.png" attr="" comment="NGspice simulation of the 12v converter" date="1289948388" name="black_12v_gaw.png" path="black_12v_gaw.png" size="45248" stream="black_12v_gaw.png" tmpFilename="/var/tmp/CGItemp35421" user="clif" version="1"
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META TOPICMOVED by="clif" date="1294951444" from="Sites.ElectonicsSandbox" to="Sites.ElectronicsSandbox"
Revision 8
13 Jan 2011 - Main.ClifCox
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META TOPICPARENT name="WebHome"

Electronics Sandbox

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  Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.Yes Robert, it's called PWM and for the load it has on it which is somewhat different than Roman's example, this is the pattern it uses to regulate the voltage. It's caused by the fixed off time and that it falls a little bit behind on the short cycle but makes up for it on the long one. If I turned up the current draw I think they would even out.

Notes:

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  • DeviceModels?
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Links:

Small DC-DC modules:
Revision 7
13 Jan 2011 - Main.ClifCox
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

Electronics Sandbox

Line: 15 to 15
  Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.Yes Robert, it's called PWM and for the load it has on it which is somewhat different than Roman's example, this is the pattern it uses to regulate the voltage. It's caused by the fixed off time and that it falls a little bit behind on the short cycle but makes up for it on the long one. If I turned up the current draw I think they would even out.

Notes:

Added:
>
>
  • DeviceModels?
 

Links:

Small DC-DC modules:
Revision 6
30 Nov 2010 - Main.ClifCox
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

Electronics Sandbox

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Here is my version of the 12V Black converter: black_12v_clean.png And the NGspice simulation: black_12v_gaw.png The turn on / off times are about 250 - 350ns.Compare the green trace with Roman's: cro.jpg
Changed:
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Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.Yes Robert, it's called PWM and for the load it has on it which is somewhat different than Roman's example this is the pattern it uses to regulate the voltage. It's caused by the fixed off time and that it falls a little bit behind on the short cycle but makes up for it on the long one. If I turned up the current draw I think they would even out.
>
>
Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.Yes Robert, it's called PWM and for the load it has on it which is somewhat different than Roman's example, this is the pattern it uses to regulate the voltage. It's caused by the fixed off time and that it falls a little bit behind on the short cycle but makes up for it on the long one. If I turned up the current draw I think they would even out.
 

Notes:

Links:

Revision 5
29 Nov 2010 - Main.ClifCox
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

Electronics Sandbox

Line: 12 to 12
 

Here is my version of the 12V Black converter: black_12v_clean.png And the NGspice simulation: black_12v_gaw.png The turn on / off times are about 250 - 350ns.Compare the green trace with Roman's: cro.jpg
Changed:
<
<
Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.
>
>
Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.Yes Robert, it's called PWM and for the load it has on it which is somewhat different than Roman's example this is the pattern it uses to regulate the voltage. It's caused by the fixed off time and that it falls a little bit behind on the short cycle but makes up for it on the long one. If I turned up the current draw I think they would even out.
 

Notes:

Links:

Revision 4
23 Nov 2010 - Main.RobertKelley
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

Electronics Sandbox

Line: 11 to 11
  Now my friend Gary says I should just get an dev kit like the SLUU068C for $100 and add beefy power blocks to it.

Here is my version of the 12V Black converter: black_12v_clean.png And the NGspice simulation: black_12v_gaw.png The turn on / off times are about 250 - 350ns.Compare the green trace with Roman's: cro.jpg
Added:
>
>

Clif, your circuit seems to alternate long and short cycles somehow, the trace does not look like Roman's.
 

Notes:

Links:

Revision 3
17 Nov 2010 - Main.ClifCox
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META TOPICPARENT name="WebHome"

Electronics Sandbox

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  Small DC-DC modules:
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Chip level controlers
  -- ClifCox - 2010-11-16

META FILEATTACHMENT attachment="sluu068c-1.pdf" attr="" comment="SLUU068C data sheet" date="1289940507" name="sluu068c-1.pdf" path="sluu068c-1.pdf" size="110412" stream="sluu068c-1.pdf" tmpFilename="/var/tmp/CGItemp35481" user="clif" version="1"
Revision 2
17 Nov 2010 - Main.ClifCox
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

Electronics Sandbox

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Bootstrap supplies

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I've been dabbleing in SMPS arena, and might need some low power high voltage bootstrap supplies for a project. I'm thinking of baseing them on Roman Black's very minimalistic converter: http://www.romanblack.com/smps/smps.htm Which is based on Richard Ottosen's SMPS.
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I've been dabbleing in the SMPS arena, and might need some low power high voltage bootstrap supplies for a project. I'm thinking of baseing them on Roman Black's very minimalistic converter: http://www.romanblack.com/smps/smps.htm Which is based on Richard Ottosen's SMPS.
 

Now my friend Gary says I should just get an dev kit like the SLUU068C for $100 and add beefy power blocks to it.
Changed:
<
<
Here is my version of the 12V Black converter: black_12v_clean.png
>
>
Here is my version of the 12V Black converter: black_12v_clean.png And the NGspice simulation: black_12v_gaw.png The turn on / off times are about 250 - 350ns.Compare the green trace with Roman's: cro.jpg
 

Notes:

Added:
>
>
 

Links:

Small DC-DC modules:
Line: 21 to 22
 

META FILEATTACHMENT attachment="sluu068c-1.pdf" attr="" comment="SLUU068C data sheet" date="1289940507" name="sluu068c-1.pdf" path="sluu068c-1.pdf" size="110412" stream="sluu068c-1.pdf" tmpFilename="/var/tmp/CGItemp35481" user="clif" version="1"
META FILEATTACHMENT attachment="tdc_hpr1xxc.pdf" attr="" comment="Small DC-DC modules" date="1289941668" name="tdc_hpr1xxc.pdf" path="tdc_hpr1xxc.pdf" size="108690" stream="tdc_hpr1xxc.pdf" tmpFilename="/var/tmp/CGItemp35429" user="clif" version="1"
Changed:
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META FILEATTACHMENT attachment="black_12v_clean.png" attr="" comment="My 12V Black converter" date="1289944754" name="black_12v_clean.png" path="black_12v_clean.png" size="32629" stream="black_12v_clean.png" tmpFilename="/var/tmp/CGItemp39134" user="clif" version="3"
>
>
META FILEATTACHMENT attachment="black_12v_clean.png" attr="" comment="My 12V Black converter" date="1289950088" name="black_12v_clean.png" path="black_12v_clean.png" size="30319" stream="black_12v_clean.png" tmpFilename="/var/tmp/CGItemp39053" user="clif" version="4"
META FILEATTACHMENT attachment="black_12v_gaw.png" attr="" comment="NGspice simulation of the 12v converter" date="1289948388" name="black_12v_gaw.png" path="black_12v_gaw.png" size="45248" stream="black_12v_gaw.png" tmpFilename="/var/tmp/CGItemp35421" user="clif" version="1"
 
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