the thing
switching wave-forms at max.-min. load
[Eop]
switching wave-forms at max.-min. load
[Eop]
Friday, October 26, 2018
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
[Eop]
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
[Eop]
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 ::
[Eop]
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]
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
[Eop]
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
[Eop]