LED driver

Winfield Hill <winfieldhill@yahoo.com> wrote in
news:r1061q017eb@drn.newsguy.com:

jlarkin@highlandsniptechnology.com wrote...

On 30 Jan 2020, Winfield Hill wrote:

DecadentLinuxUserNumeroUno@decadence.org wrote...

Make me a LED amp driver with precision current ...

Make me an LED driver that can pulse a 3-volt theatre
LED to 350A at 20V (7kW). Make me an LED driver that
can pulse a 30V 3.3A 100W COB LED array to 33A (2kW).

http://www.highlandtechnology.com/DSS/D100DS.shtml
https://www.dropbox.com/s/rzxmgz6wsgc0l1l/D140_Top.JPG?raw=1
https://www.dropbox.com/s/qyqsjfhuxn9ldnk/D140_200A_Pulse.JPG?raw=1

We don't sell many of this kind of driver, because so
many people do it, it's a price war to the bottom.

Sigh> Is there nothing new under the sun? Well, OK,
maximum current so far is 600A vs 250A, and rise-fall
time is ~1us, faster than 10us. Plus 100W capability.
But this must be an easy-to-copy design. OK, it's in
AoE x-Chapters, and new design details are on DropBox.
Click to expand...

I would have a huge supply unit making a rail feeding individual
current controllers feeding small batches of the whole load. Then
the supply need only be hefty enough to keep the individual units
fed. The individual units all manage their duty cycles seperately.
Just like a motherboard has Point of Load units on it.
 
John S wrote:
On 1/30/2020 2:35 AM, Robert Baer wrote:
Steve Wilson wrote:
Version 4
SHEET 1 1056 712
WIRE -16 64 -208 64
WIRE 80 64 -16 64
WIRE 240 64 160 64
WIRE 272 64 240 64
WIRE 336 64 272 64
WIRE 448 64 336 64
WIRE 336 112 336 64
WIRE 448 112 448 64
WIRE -16 128 -16 64
WIRE -208 176 -208 64
WIRE 240 208 240 64
WIRE 448 240 448 176
WIRE -16 256 -16 208
WIRE 48 256 -16 256
WIRE 176 256 48 256
WIRE -208 304 -208 256
WIRE 240 320 240 304
WIRE 288 320 240 320
WIRE 336 320 336 176
WIRE 336 320 288 320
WIRE -16 336 -16 256
WIRE 336 336 336 320
WIRE 240 352 240 320
WIRE -16 464 -16 400
WIRE 240 464 240 432
WIRE 336 464 336 400
FLAG -16 464 0
FLAG 336 464 0
FLAG -208 304 0
FLAG 240 464 0
FLAG 448 240 0
FLAG 272 64 Q1C
FLAG 288 320 Q1E
FLAG 48 256 Q1B
SYMBOL LED 432 112 R0
WINDOW 0 39 77 Left 2
WINDOW 3 32 106 Left 2
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMBOL ind 64 80 R270
WINDOW 0 -32 56 VTop 2
WINDOW 3 -38 55 VBottom 2
SYMATTR InstName L1
SYMATTR Value 200u
SYMBOL npn 176 208 R0
WINDOW 0 -54 25 Left 2
WINDOW 3 -90 73 Left 2
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL cap 320 112 R0
WINDOW 0 52 26 Left 2
WINDOW 3 48 60 Left 2
SYMATTR InstName C1
SYMATTR Value 33n
SYMBOL cap 320 336 R0
WINDOW 0 49 23 Left 2
WINDOW 3 42 59 Left 2
SYMATTR InstName C2
SYMATTR Value 300n
SYMBOL cap -32 336 R0
WINDOW 0 52 9 Left 2
WINDOW 3 53 44 Left 2
SYMATTR InstName C3
SYMATTR Value 1u
SYMBOL res -32 112 R0
WINDOW 0 53 44 Left 2
WINDOW 3 44 79 Left 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL voltage -208 160 R0
WINDOW 0 54 44 Left 2
WINDOW 3 52 79 Left 2
SYMATTR InstName V1
SYMATTR Value 1.5
SYMBOL res 224 336 R0
WINDOW 0 -51 43 Left 2
WINDOW 3 -48 74 Left 2
SYMATTR InstName R2
SYMATTR Value 50
TEXT -168 -64 Left 2 ;'Single-Cell LED driver
TEXT 56 -8 Left 2 ;J Larkin  Jan 29  2020
TEXT -136 520 Left 2 ;CT = (33*300) / (33 + 300) = 29.e-9\n \nFc = 1
/ (2 *
pi * sqrt(200e-6 * 29e-9)) = 66,085\n \nXL = 2 * pi * 200e-6 * 66,085
= 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085 * 300e-9) =
8.02
TEXT -168 0 Left 2 ;.tran 0 5m 0 10u
TEXT -168 32 Left 2 ;.tran 0 100m
TEXT -168 -32 Left 2 !.tran 0 5m 0 10u
   "unknown schematic syntax" : pi * sqrt(200e-6 * 29e-9)) = 66,085\n
\nXL = 2 * pi * 200e-6 * 66,085 = 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085 * 300e-9) =
8.02

He *did* say watch the wrap (which you cut). I got the same message then
unwrapped the lines and it runs fine.
Thanks.
Click to expand...
 
Robert Baer <robertbaer@localnet.com> wrote in
news:TcVYF.179496$zI7.75747@fx37.iad:

John S wrote:
On 1/30/2020 2:35 AM, Robert Baer wrote:
Steve Wilson wrote:
Version 4
SHEET 1 1056 712
WIRE -16 64 -208 64
WIRE 80 64 -16 64
WIRE 240 64 160 64
WIRE 272 64 240 64
WIRE 336 64 272 64
WIRE 448 64 336 64
WIRE 336 112 336 64
WIRE 448 112 448 64
WIRE -16 128 -16 64
WIRE -208 176 -208 64
WIRE 240 208 240 64
WIRE 448 240 448 176
WIRE -16 256 -16 208
WIRE 48 256 -16 256
WIRE 176 256 48 256
WIRE -208 304 -208 256
WIRE 240 320 240 304
WIRE 288 320 240 320
WIRE 336 320 336 176
WIRE 336 320 288 320
WIRE -16 336 -16 256
WIRE 336 336 336 320
WIRE 240 352 240 320
WIRE -16 464 -16 400
WIRE 240 464 240 432
WIRE 336 464 336 400
FLAG -16 464 0
FLAG 336 464 0
FLAG -208 304 0
FLAG 240 464 0
FLAG 448 240 0
FLAG 272 64 Q1C
FLAG 288 320 Q1E
FLAG 48 256 Q1B
SYMBOL LED 432 112 R0
WINDOW 0 39 77 Left 2
WINDOW 3 32 106 Left 2
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMBOL ind 64 80 R270
WINDOW 0 -32 56 VTop 2
WINDOW 3 -38 55 VBottom 2
SYMATTR InstName L1
SYMATTR Value 200u
SYMBOL npn 176 208 R0
WINDOW 0 -54 25 Left 2
WINDOW 3 -90 73 Left 2
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL cap 320 112 R0
WINDOW 0 52 26 Left 2
WINDOW 3 48 60 Left 2
SYMATTR InstName C1
SYMATTR Value 33n
SYMBOL cap 320 336 R0
WINDOW 0 49 23 Left 2
WINDOW 3 42 59 Left 2
SYMATTR InstName C2
SYMATTR Value 300n
SYMBOL cap -32 336 R0
WINDOW 0 52 9 Left 2
WINDOW 3 53 44 Left 2
SYMATTR InstName C3
SYMATTR Value 1u
SYMBOL res -32 112 R0
WINDOW 0 53 44 Left 2
WINDOW 3 44 79 Left 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL voltage -208 160 R0
WINDOW 0 54 44 Left 2
WINDOW 3 52 79 Left 2
SYMATTR InstName V1
SYMATTR Value 1.5
SYMBOL res 224 336 R0
WINDOW 0 -51 43 Left 2
WINDOW 3 -48 74 Left 2
SYMATTR InstName R2
SYMATTR Value 50
TEXT -168 -64 Left 2 ;'Single-Cell LED driver
TEXT 56 -8 Left 2 ;J Larkin  Jan 29  2020
TEXT -136 520 Left 2 ;CT = (33*300) / (33 + 300) = 29.e-9\n
\nFc = 1 / (2 *
pi * sqrt(200e-6 * 29e-9)) = 66,085\n \nXL = 2 * pi * 200e-6 *
66,085 = 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085
* 300e-9) = 8.02
TEXT -168 0 Left 2 ;.tran 0 5m 0 10u
TEXT -168 32 Left 2 ;.tran 0 100m
TEXT -168 -32 Left 2 !.tran 0 5m 0 10u
   "unknown schematic syntax" : pi * sqrt(200e-6 * 29e-9)) =
66,085\n \nXL = 2 * pi * 200e-6 * 66,085 = 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085 *
300e-9) = 8.02

He *did* say watch the wrap (which you cut). I got the same
message then unwrapped the lines and it runs fine.
Thanks.
Click to expand...

Found a neat video that could be used for a driver chip for this...

<https://www.youtube.com/watch?v=ra7bT74EGUs>
 
DecadentLinuxUserNumeroUno@decadence.org wrote...
Found a neat video that could be used for a driver chip for this...

https://www.youtube.com/watch?v=ra7bT74EGUs
Click to expand...

The ATtiny10-TSHR, 12MHz controller in sot-23-6
package, includes ADC. Costs $0.33 each single.
The youtube video is complete 53-minute how-to,
detailing the best ways to program the ATtiny10.

With an added MOSFET, etc., an ATtiny10 can make
tiny smart goodies, like fan controllers, etc.


--
Thanks,
- Win
 
DecadentLinuxUserNumeroUno@decadence.org wrote...
Winfield Hill wrote:
jlarkin@highlandsniptechnology.com wrote...
On 30 Jan 2020, Winfield Hill wrote:
DecadentLinuxUserNumeroUno@decadence.org wrote...

Make me a LED amp driver with precision current ...

Make me an LED driver that can pulse a 3-volt theatre
LED to 350A at 20V (7kW). Make me an LED driver that
can pulse a 30V 3.3A 100W COB LED array to 33A (2kW).

http://www.highlandtechnology.com/DSS/D100DS.shtml
https://www.dropbox.com/s/rzxmgz6wsgc0l1l/D140_Top.JPG?raw=1
https://www.dropbox.com/s/qyqsjfhuxn9ldnk/D140_200A_Pulse.JPG?raw=1

We don't sell many of this kind of driver, because so
many people do it, it's a price war to the bottom.

Sigh> Is there nothing new under the sun? Well, OK,
maximum current so far is 600A vs 250A, and rise-fall
time is ~1us, faster than 10us. Plus 100W capability.
But this must be an easy-to-copy design. OK, it's in
AoE x-Chapters, and new design details are on DropBox.

I would have a huge supply unit making a rail feeding individual
current controllers feeding small batches of the whole load. Then
the supply need only be hefty enough to keep the individual units
fed. The individual units all manage their duty cycles seperately.
Just like a motherboard has Point of Load units on it.
Click to expand...

A big part of 250A drivers, etc., is the storage caps:
four small polymer types for low esr (390uF 18mR), two
large electrolytics (2200uF 22mR) for high capacitance.
At low duty cycles the source supply sees light loads.


--
Thanks,
- Win
 
Winfield Hill <winfieldhill@yahoo.com> wrote in news:r11dpn0ae4
@drn.newsguy.com:

DecadentLinuxUserNumeroUno@decadence.org wrote...

Found a neat video that could be used for a driver chip for
this...

https://www.youtube.com/watch?v=ra7bT74EGUs

The ATtiny10-TSHR, 12MHz controller in sot-23-6
package, includes ADC. Costs $0.33 each single.
The youtube video is complete 53-minute how-to,
detailing the best ways to program the ATtiny10.

With an added MOSFET, etc., an ATtiny10 can make
tiny smart goodies, like fan controllers, etc.
Click to expand...

Oh it is an excellent vid. 32 Bytes RAM!

I like his ASCII UART coding... "oops... oh yeah!".
 
On 1/31/2020 6:54 AM, DecadentLinuxUserNumeroUno@decadence.org wrote:
[snip]

Found a neat video that could be used for a driver chip for this...

https://www.youtube.com/watch?v=ra7bT74EGUs
Click to expand...

Good find. Thanks.
 
On Friday, January 31, 2020 at 12:54:58 PM UTC, DecadentLinux...@decadence.org wrote:
Robert Baer <robertbaer@xxx.com> wrote in
news:TcVYF.179496$zI7.75747@fx37.iad:

John S wrote:
On 1/30/2020 2:35 AM, Robert Baer wrote:
Steve Wilson wrote:
Version 4
SHEET 1 1056 712
WIRE -16 64 -208 64
WIRE 80 64 -16 64
WIRE 240 64 160 64
WIRE 272 64 240 64
WIRE 336 64 272 64
WIRE 448 64 336 64
WIRE 336 112 336 64
WIRE 448 112 448 64
WIRE -16 128 -16 64
WIRE -208 176 -208 64
WIRE 240 208 240 64
WIRE 448 240 448 176
WIRE -16 256 -16 208
WIRE 48 256 -16 256
WIRE 176 256 48 256
WIRE -208 304 -208 256
WIRE 240 320 240 304
WIRE 288 320 240 320
WIRE 336 320 336 176
WIRE 336 320 288 320
WIRE -16 336 -16 256
WIRE 336 336 336 320
WIRE 240 352 240 320
WIRE -16 464 -16 400
WIRE 240 464 240 432
WIRE 336 464 336 400
FLAG -16 464 0
FLAG 336 464 0
FLAG -208 304 0
FLAG 240 464 0
FLAG 448 240 0
FLAG 272 64 Q1C
FLAG 288 320 Q1E
FLAG 48 256 Q1B
SYMBOL LED 432 112 R0
WINDOW 0 39 77 Left 2
WINDOW 3 32 106 Left 2
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMBOL ind 64 80 R270
WINDOW 0 -32 56 VTop 2
WINDOW 3 -38 55 VBottom 2
SYMATTR InstName L1
SYMATTR Value 200u
SYMBOL npn 176 208 R0
WINDOW 0 -54 25 Left 2
WINDOW 3 -90 73 Left 2
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL cap 320 112 R0
WINDOW 0 52 26 Left 2
WINDOW 3 48 60 Left 2
SYMATTR InstName C1
SYMATTR Value 33n
SYMBOL cap 320 336 R0
WINDOW 0 49 23 Left 2
WINDOW 3 42 59 Left 2
SYMATTR InstName C2
SYMATTR Value 300n
SYMBOL cap -32 336 R0
WINDOW 0 52 9 Left 2
WINDOW 3 53 44 Left 2
SYMATTR InstName C3
SYMATTR Value 1u
SYMBOL res -32 112 R0
WINDOW 0 53 44 Left 2
WINDOW 3 44 79 Left 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL voltage -208 160 R0
WINDOW 0 54 44 Left 2
WINDOW 3 52 79 Left 2
SYMATTR InstName V1
SYMATTR Value 1.5
SYMBOL res 224 336 R0
WINDOW 0 -51 43 Left 2
WINDOW 3 -48 74 Left 2
SYMATTR InstName R2
SYMATTR Value 50
TEXT -168 -64 Left 2 ;'Single-Cell LED driver
TEXT 56 -8 Left 2 ;J Larkin  Jan 29  2020
TEXT -136 520 Left 2 ;CT = (33*300) / (33 + 300) = 29.e-9\n
\nFc = 1 / (2 *
pi * sqrt(200e-6 * 29e-9)) = 66,085\n \nXL = 2 * pi * 200e-6 *
66,085 = 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085
* 300e-9) = 8.02
TEXT -168 0 Left 2 ;.tran 0 5m 0 10u
TEXT -168 32 Left 2 ;.tran 0 100m
TEXT -168 -32 Left 2 !.tran 0 5m 0 10u
   "unknown schematic syntax" : pi * sqrt(200e-6 * 29e-9)) > >>> 66,085\n \nXL = 2 * pi * 200e-6 * 66,085 = 83
\n \nQ = 83 / 1e-3 =   83,000\n \nXC2 = 1 / (2 * pi * 66,085 *
300e-9) = 8.02

He *did* say watch the wrap (which you cut). I got the same
message then unwrapped the lines and it runs fine.
Thanks.



Found a neat video that could be used for a driver chip for this...

https://www.youtube.com/watch?v=ra7bT74EGUs
Click to expand...

Thanks for the neat idea.
Mr Heck would do to have an EE check his video before posting.
He is missing a resistor to limit the base-current into Q1 (PNP)
- a rookie error.
Also w.r.t. switches "pole" and "throw" are not the same things.
I stopped watching after 9 minutes...
 
On Thu, 30 Jan 2020 06:55:10 -0800, bloggs.fredbloggs.fred wrote:

On Wednesday, January 29, 2020 at 10:25:47 PM UTC-5,
jla...@highlandsniptechnology.com wrote:
This is a single-cell, single inductor, single transistor LED driver.
The values are all my first wild guesses, none tuned or tweaked, so it
could be improved.

Efficiency is 70% with 1.6 mW into the LED.


(snip)

Definitely scraping the bottom of the topics barrel with this one.
Click to expand...

Not at all. Puts me in mind of Watson A. Name, the Dark Remover, and
the Joule Thief.
 
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