There are multiple values given in the table with various resistor values, but when you scroll down to the graphs, there are two called:
1. OUTPUT-VOLTAGESWINGHIGH vs. TEMPERATURE
2. OUTPUT-VOLTAGESWINGLOW vs. TEMPERATURE
Now these values from the graphs are much lower than those from the table. For the “table values”, there is a resistor RL connected to the OpAmp, but I don’t know how it is connected.
Is RL connected between the output and VDD/2, to show how near the OpAmp can get to the rail with a load on it, and the graphs, when there’s no load?
I am far from an expert in data sheets but I have learned that the graphs generally do show better numbers then the official ratings. This is due to the built in error margin that the companies build in the way I understand it. Also most of the official ratings are max ratings, so what they guarantee the components will not go over.
Thus the real world specs can generally be a fair amount better in most cases and these are what you see in the graphs.
In “real” manufacturing they design off the max ratings and then just get a nice bonus if the parts preform better.
Also I noticed this at the top of the graphs page :
Quote:
VDD = +3.3V, VGND = 0V, outputs have RL = 100kI connected to VDD/2. TA = +25NC, unless otherwise specified.
So looks like it has some resistance connected in the graphs as well.
But there is such a huge difference, 11-12mV compared to ~0.3mV
Yeah, I am not sure this is the case, just my best guess. I have seen pretty big differences before and the ratings are listed as max ratings. But that is a bit extreme I admit.
The new 17mm high-power boost driver will open up some interesting possibilities for triple lights. It will be possible to use high-Vf LEDs like the Cree XP-G2 and Osram Black Flat in a triple configuration with a high current through each LED.
The new 17mm high-power boost driver will open up some interesting possibilities for triple lights. It will be possible to use high-Vf LEds like the Cree XP-G2 and Osram Black Flat in a triple with a high current through each LED.
Yep, I plan to swap out the driver in my EDC with this one for just that reason. I still have a hard time finding a better tint then my mixed tint EDC. Although the 90CRI XHP50.2 I have been playing with looks promising, if I could find it in 4500k it would be perfect.
Why is xpg2 so interesting when we have xpl hi, nichia, sst40, samsung, luxeon? What am i missing here?
Not sure on the XP-G2 in a triple, I have xp-G3’s in my EDC right now as they provided the best high CRI tints I have found so far.
I have high hopes for the XHP50.2 though, early tests say it should be able to give around 1500 more lumens OTF compared to my existing setup and have technically higher CRI (mine is around 85cri right now).
If I could just find a 4500k 90CRI xhp50.2 it would be perfect based on tests with a 4000k and 5000k 90CRI xhp50.2.
As LD-40 is discontinued, there is currently no buck driver for red leds running from a single li-ion cell. (In the hobbyist laser land, they have flexdrive for current upto 1A) It is really a shame since efficiency of red leds keeps improving and we still drive them with 7135s. I have plans for building XPEEPR (deep red, 51% wpe) triple using a Sofirn C8F and run it at 2-3A.
I have searched a lot on TI, Linear, Onsemi – the best chips are made only for CV type application (2.5V rail), LTC3561A and LTC3612 are very promising. To design a pcb from their app note is a huge challenge for me (could take a year), because I could not just copy the app note circuit, I also should use another fet and mcu to support momentary switch and modes!
EDIT: Maybe using an Ledengin lz-4 (4 deep red dies in series) in a Convoy L6 is a better way to go, but that’s too expensive.
I plan to make a buck driver for an EDC build for myself (after I finished the 17mm boost circuit). I could make a 17mm version as well. It would be 1S only though.
I plan to make a buck driver for an EDC build for myself (after I finished the 17mm boost circuit). I could make a 17mm version as well. It would be 1S only though.
Do you plan to make a boost driver for XHP35? If so, will it boost from 1S, 2S or both?
"Over 2000000 hours (about 200 years) standby time" (DQG Tiny 4th)
"27,157 results for zoomable flashlight" (ebay)
Done:
BLF Q8 Janus --- Emisar D4 RGBW --- Green Lantern and HAL 9000
My 6th Annual Scratch Made Light Contest Entry
Awesome, so this allows you to change firmware without removing or soldering anything right?
Yes, very easy to operate and reliable. Using this for a couple of weeks, no failure up to now. Soldering the pogo pins was a challenge though.
BLF Q8 Janus --- Emisar D4 RGBW --- Green Lantern and HAL 9000
My 6th Annual Scratch Made Light Contest Entry
BLF Q8 2S/2P and 4S combinated driver 10 or 20A regulated output
XPL, XHP35, XHP50
MF01/MT03 20A regulated 4S Input 2S Output 10 or 20A
[Reviews] Miboxer C4-12, C2-4k+6k, C2, C4 / Astrolux K1, MF01, MF02, S42, K01, TI3A / BLF Q8 / Kalrus G35, XT11GT / Nitefox UT20 / Niwalker BK-FA30S / Sofirn SF36, SP35 / Imalent DM21TW / Wuben I333 / Ravemen PR1200 / CL06 lantern / Xanes headlamp
[Mods] Skilhunt H03 short / Klarus XT11GT, XT12GTS / Zebralight SC50+ / Imalent DM21TW / colorful anodisation
[Sale]
Drivers: TA based drivers NarsilM or Bistro OTSM 17-22mm, S42, L6, Q8, MF01, SRK, TN42 / Narsil based buck driver for 20-30mm MF01/02, TN40/42, GT, MT09R / Remote switch tail DD board with FET
Aux boards: Emisar D1, D1S, D4, D4S, D18, Lumintop FW3A, Fireflies ROT66, Astrolux MF01, Tail boards like S2+
Is there a blf style buck driver (good, customizable UI ), that can do 2s input and have 8-11A output for 3v led?
The MTNmax buck stops at 5.5-6A.
With some of the newer leds they dont really stand out from the crowd till they hit 7+A.
I have such a driver in 30mm based on BLF GT design, the boards arrived yesterday
shrinking it to 22mm wont be possible with the limited choice of the MOSFET
[Reviews] Miboxer C4-12, C2-4k+6k, C2, C4 / Astrolux K1, MF01, MF02, S42, K01, TI3A / BLF Q8 / Kalrus G35, XT11GT / Nitefox UT20 / Niwalker BK-FA30S / Sofirn SF36, SP35 / Imalent DM21TW / Wuben I333 / Ravemen PR1200 / CL06 lantern / Xanes headlamp
[Mods] Skilhunt H03 short / Klarus XT11GT, XT12GTS / Zebralight SC50+ / Imalent DM21TW / colorful anodisation
[Sale]
Drivers: TA based drivers NarsilM or Bistro OTSM 17-22mm, S42, L6, Q8, MF01, SRK, TN42 / Narsil based buck driver for 20-30mm MF01/02, TN40/42, GT, MT09R / Remote switch tail DD board with FET
Aux boards: Emisar D1, D1S, D4, D4S, D18, Lumintop FW3A, Fireflies ROT66, Astrolux MF01, Tail boards like S2+
I have a small problem reading this OpAmp datasheet here: https://datasheets.maximintegrated.com/en/ds/MAX9617-MAX9620.pdf
To be precise it’s the “Output Voltage-Swing”.
There are multiple values given in the table with various resistor values, but when you scroll down to the graphs, there are two called:
1. OUTPUT-VOLTAGE SWING HIGH vs. TEMPERATURE
2. OUTPUT-VOLTAGE SWING LOW vs. TEMPERATURE
Now these values from the graphs are much lower than those from the table. For the “table values”, there is a resistor RL connected to the OpAmp, but I don’t know how it is connected.
Is RL connected between the output and VDD/2, to show how near the OpAmp can get to the rail with a load on it, and the graphs, when there’s no load?
I am far from an expert in data sheets but I have learned that the graphs generally do show better numbers then the official ratings. This is due to the built in error margin that the companies build in the way I understand it. Also most of the official ratings are max ratings, so what they guarantee the components will not go over.
Thus the real world specs can generally be a fair amount better in most cases and these are what you see in the graphs.
In “real” manufacturing they design off the max ratings and then just get a nice bonus if the parts preform better.
Also I noticed this at the top of the graphs page :
So looks like it has some resistance connected in the graphs as well.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
But there is such a huge difference, 11-12mV compared to ~0.3mV
Yeah, I am not sure this is the case, just my best guess. I have seen pretty big differences before and the ratings are listed as max ratings. But that is a bit extreme I admit.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
The new 17mm high-power boost driver will open up some interesting possibilities for triple lights. It will be possible to use high-Vf LEDs like the Cree XP-G2 and Osram Black Flat in a triple configuration with a high current through each LED.
Project Excalibur - Next Generation LED Thrower (UPDATE 2018-01-15: 1.7Mcd)
Portable Thrower Comparison
Yep, I plan to swap out the driver in my EDC with this one for just that reason. I still have a hard time finding a better tint then my mixed tint EDC. Although the 90CRI XHP50.2 I have been playing with looks promising, if I could find it in 4500k it would be perfect.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
Why is xpg2 so interesting when we have xpl hi, nichia, sst40, samsung, luxeon? What am i missing here?
Not sure on the XP-G2 in a triple, I have xp-G3’s in my EDC right now as they provided the best high CRI tints I have found so far.
I have high hopes for the XHP50.2 though, early tests say it should be able to give around 1500 more lumens OTF compared to my existing setup and have technically higher CRI (mine is around 85cri right now).
If I could just find a 4500k 90CRI xhp50.2 it would be perfect based on tests with a 4000k and 5000k 90CRI xhp50.2.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
It has a higher luminance at the same current. Instead of 7A you can drive it with 4A for the same throw.
Project Excalibur - Next Generation LED Thrower (UPDATE 2018-01-15: 1.7Mcd)
Portable Thrower Comparison
It has a higher luminance at the same current. Instead of 7A you can drive it with 4A for the same throw.
Project Excalibur - Next Generation LED Thrower (UPDATE 2018-01-15: 1.7Mcd)
Portable Thrower Comparison
As LD-40 is discontinued, there is currently no buck driver for red leds running from a single li-ion cell. (In the hobbyist laser land, they have flexdrive for current upto 1A) It is really a shame since efficiency of red leds keeps improving and we still drive them with 7135s. I have plans for building XPEEPR (deep red, 51% wpe) triple using a Sofirn C8F and run it at 2-3A.
I have searched a lot on TI, Linear, Onsemi – the best chips are made only for CV type application (2.5V rail), LTC3561A and LTC3612 are very promising. To design a pcb from their app note is a huge challenge for me (could take a year), because I could not just copy the app note circuit, I also should use another fet and mcu to support momentary switch and modes!
EDIT: Maybe using an Ledengin lz-4 (4 deep red dies in series) in a Convoy L6 is a better way to go, but that’s too expensive.
I plan to make a buck driver for an EDC build for myself (after I finished the 17mm boost circuit). I could make a 17mm version as well. It would be 1S only though.
Do you plan to make a boost driver for XHP35? If so, will it boost from 1S, 2S or both?
Courui D01 -Mod ZY-T08 Small Sun -Mod Shadow JM30 Mod - copper edition Brinyte 158B mod - copper brass hybrid
Small sun ZY-T08 Mod II - The Next Generation Small Sun ZY-T08 Best Of Both Worlds Warsun X50 mod - a complete makeover
Maglite 3C Mod - old school style
Yes, and both
Very nice
. What max current do you expect?
Courui D01 -Mod ZY-T08 Small Sun -Mod Shadow JM30 Mod - copper edition Brinyte 158B mod - copper brass hybrid
Small sun ZY-T08 Mod II - The Next Generation Small Sun ZY-T08 Best Of Both Worlds Warsun X50 mod - a complete makeover
Maglite 3C Mod - old school style
roughly 6A with 6V config, up to 3A with 12V config
Waiting impatiently
….
Courui D01 -Mod ZY-T08 Small Sun -Mod Shadow JM30 Mod - copper edition Brinyte 158B mod - copper brass hybrid
Small sun ZY-T08 Mod II - The Next Generation Small Sun ZY-T08 Best Of Both Worlds Warsun X50 mod - a complete makeover
Maglite 3C Mod - old school style
Will it have the custom firmwares normally used here?
Project Excalibur - Next Generation LED Thrower (UPDATE 2018-01-15: 1.7Mcd)
Portable Thrower Comparison
Initially Bistro HD, as to others – there’s hope that at least some will be ported.
3A @12V and 1-2s will be a nice option to have. I like the H2-C based XHP35 HI light I built, but I’d really like to push it past 1.5A.
Looking for Emisar D1 firmware, simple 3-4 modes, temperature controled
Really good thread about loneoceans’ new driver: http://budgetlightforum.com/node/59137
This driver has many similarities compared to the driver I’m currently developing (with the help of some others).
I have another wish:
A compact boost driver for COB LEDs in the 30-40V range with all the usual features of flashlight drivers.
Project Excalibur - Next Generation LED Thrower (UPDATE 2018-01-15: 1.7Mcd)
Portable Thrower Comparison
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