Sunday, December 30, 2018
Sunday, December 23, 2018
Comparing Different 6LF22 to +5V supplies
Circuits ::
Cross Ref. ::
Cross Ref. ::
Param. | 100 | 110 | 120 | 122 | 124 | 128 |
Description | Pos. collector-load linear-reg. | Pos. collector-load linear-reg. with fold-back | Pos. experimental Op-Amp regulated collector-load linear-reg. | Neg. j-Fet - emitter-load linear-reg. with fold-back | Pos. emitter-load linear-reg. with current lim. | Pos. VF-PWM buck conv. |
Average Efficiency | 51% | 53% | 57% | 38% | 28% | 83% |
Short-Circuit Current | 120 mA | 1.7 mA | NOT Ltd. | 2.6 mA | * 57 mA | NOT Ltd. |
Voltage Regulation | ± 600 µV | ± 250 µV | ± 300 µV | ± 15 µV | (± 550µV) | ± 54 mV |
Output Current : Nominal (Max.) | 80 (85) mA | 80 (145) mA | 80 (150) mA | 50 (105) mA | * 50 (54) mA | 200 (>400) mA |
Source Circuits ::
↑↑ src :: ISBN 5-440-00345-2
↑↑ src :: GE Transistor Manual 1964 ↑↑
↑↑ found from :: LED Torch Circuits ↑↑
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Thursday, December 20, 2018
Monday, December 3, 2018
The КР140УД1208 (µA776) variants' Comparison
as by control current range -- i can telll -- i still don't have the Model 4 the Op Amp in question ...
anyway , here's the variations in between what i've come up with ::
↑ and this is better ↑ than nothing -- because it reveals the SR being dependent on the supply voltage and the control current . . . ← but also the Outp.Zero or Balance changes along . . . so the uA776 is a head-ake . . . -- to be set up with the floating supply --and/or-- with the wide-varying signal amplitude/-frequency range
► a small signal pulse response test -- it necessarily won't have the best performer being the best match2® dependency ...
► a small signal sine test -- reveals (as and brought below) the offset and phase/SR differences
-- the unit is -- (µ-"ns") per (µA)² -- the delay is revealed indirect from ::
dt(for 776) = dt(776.Outp , Fn.Gen.Outp) – dt(LT1013.Outp , Fn.Gen.Outp)
near the ~AC.zero --or-- the SG (Signal Ground) , e.g. -- near/@ ±0V in the circuit below
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anyway , here's the variations in between what i've come up with ::
↑ and this is better ↑ than nothing -- because it reveals the SR being dependent on the supply voltage and the control current . . . ← but also the Outp.Zero or Balance changes along . . . so the uA776 is a head-ake . . . -- to be set up with the floating supply --and/or-- with the wide-varying signal amplitude/-frequency range
► a small signal pulse response test -- it necessarily won't have the best performer being the best match2® dependency ...
► a small signal sine test -- reveals (as and brought below) the offset and phase/SR differences
-- the unit is -- (µ-"ns") per (µA)² -- the delay is revealed indirect from ::
dt(for 776) = dt(776.Outp , Fn.Gen.Outp) – dt(LT1013.Outp , Fn.Gen.Outp)
near the ~AC.zero --or-- the SG (Signal Ground) , e.g. -- near/@ ±0V in the circuit below
[Eop]
Friday, October 26, 2018
9V-to-5V Step-down concep design
Labels:
5V,
6F22,
9v,
buck,
DC-DC,
step-dn,
switching regulator,
voltage supply
Saturday, October 20, 2018
? Inductorless Flash-light energy efficient ?
about ::
src. :: Single-Cell Programmable Constant Current Boost LED Driver
src. :: Питание Для Светодиодов (Started by vanPelt, April 26, 2012)
Principal functional analog (or better)
-- about the 500mΩ being enough to regulate the current
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src. :: Single-Cell Programmable Constant Current Boost LED Driver
src. :: Питание Для Светодиодов (Started by vanPelt, April 26, 2012)
Principal functional analog (or better)
-- about the 500mΩ being enough to regulate the current
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Saturday, October 6, 2018
revised the yy78Lxx 5V variants
tests so far ::
PS! -- although the following setups perform well the real tings may not coz the Spice models use highly accurate fixed current sources - - - while there's no indication the real 78Lxx-s had any implemented //// the last time i tested my real 78Lxx-s showed an ulta poor performance where the voltage started to drop already at !!!above 30-/40 mA drain and significantly differed from the nominal at 50mA (while i didn't notice them getting hot -- so that a possible thermal prot. feature could have had engaged ???)
partial apx. match to d/s ::
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PS! -- although the following setups perform well the real tings may not coz the Spice models use highly accurate fixed current sources - - - while there's no indication the real 78Lxx-s had any implemented //// the last time i tested my real 78Lxx-s showed an ulta poor performance where the voltage started to drop already at !!!above 30-/40 mA drain and significantly differed from the nominal at 50mA (while i didn't notice them getting hot -- so that a possible thermal prot. feature could have had engaged ???)
partial apx. match to d/s ::
[Eop]
Labels:
12V,
18V,
5V,
78L05,
9v,
Linear regulator,
LM6142,
voltage regulator
Monday, October 1, 2018
Improved the К554СА3 model
some tests ::
PS! : because the low CE voltage drop transistors used i cannot guarantee the device will work down to that it does in simulations but i guess it does significantly below the specified ±13.5V
PS#2 ! : the LM311 model is obviously an over idealized one . . . is just included for the comparison
! Update :: "Unlimited" frequency range oscillator
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PS! : because the low CE voltage drop transistors used i cannot guarantee the device will work down to that it does in simulations but i guess it does significantly below the specified ±13.5V
PS#2 ! : the LM311 model is obviously an over idealized one . . . is just included for the comparison
! Update :: "Unlimited" frequency range oscillator
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Tuesday, September 18, 2018
Friday, September 7, 2018
Thursday, August 30, 2018
YX8018 ~about "guessing the operation"
→NB←! the following has pretty much nothing to do with the actual chip !!! ←
i just matched some known or guessed data into random simulation substitute
from what we can conclude ::
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i just matched some known or guessed data into random simulation substitute
from what we can conclude ::
- the device operates best at certain fixed supply voltage (there might be one built in to YX8018)
- the best efficiency is occurring below the certain output power = you should not replace the inductor to lesser inductance one without making sure :
a) that there's enough power to drive the inductor (somewhat aided by the 1µF and 5µH caps inductors at the schematic) ,
b) that the inductor won't be driven into saturation
( ↑↑ ← both are primarily indicated by a notable drop in efficiency compared to initial -- however the lesser inductance does, by the idea, give a* higher output power and usually there is some efficiency drop for "trade" to such* ) - the onboard inductor in my particular solar lantern has 4Ω series resistance (it might be useful to protect the mosfet from peak power ? from accidental out of cycle re-trigger . . . or provide some voltage regulation for more up to charge battery) , otherwise there's a plenty of room to install a better inductor (such might also cause the over-voltage at the switch drain -- it must be tested out at max input power)
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Tuesday, August 28, 2018
Predicate research for using the LED as a photodiode
in prior of doing the following i measured the target Blue LED that did output some millivolts but no nanoamps , then a high efficiency Blue LED that i used for below experiments (← the series array of theses gave pretty much alike data than the single one) . . . then the iR LED parallel array from the (used for . . . ?? pre-clearing the image in) laser printer , it output over 1V and i guess several microamps . . .
. . . all that illuminated from the narrow beam 1W Power LED
the conflicting data (with web) is that when illuminating the LED it outputs fw.-polarity voltage -- e.g. [+] from anode and [-] from cathode * . . . all 3-types of the above without the exception ???
Note* :: no conflict (http://www.ques10.com/p/9330/explain-with-neat-diagram-construction-and-worki-1/) , conflict ( . . . there was a site that actually textually claimed that ? intentionally or not . . . can't re-find it at this time . . . and it was not the only one such . . .)
first couple of web found setups (slightly modified)
and my own guesses of j-Fet setups
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. . . all that illuminated from the narrow beam 1W Power LED
the conflicting data (with web) is that when illuminating the LED it outputs fw.-polarity voltage -- e.g. [+] from anode and [-] from cathode * . . . all 3-types of the above without the exception ???
Note* :: no conflict (http://www.ques10.com/p/9330/explain-with-neat-diagram-construction-and-worki-1/) , conflict ( . . . there was a site that actually textually claimed that ? intentionally or not . . . can't re-find it at this time . . . and it was not the only one such . . .)
first couple of web found setups (slightly modified)
and my own guesses of j-Fet setups
[Eop]