You can of course go higher, but it will reduce smoothness in brightness control. So if you want control over the lower ranges of duty cycle, you need to reduce the PWM frequency. But that’s just not practical in most cases. Even give you a headache. I am currently extremely busy with work.

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Here is the test circuit I used to check how long it takes for the circuit to draw a stable mA through the LED: Odd or even number of chips is leed.

Please do not expect a response from me quickly. Heat will be your enemy. At about 2kHz PWM frequency, things seem okay!

How fast can you run the PWM? But what if he eats the whole bag? PWM control will not be effective over all duty cycles.

That is, Turn-on time: Thanks for the info. In other words, Lo is. The higher you go, the less efficient your LED becomes. Skip to main content. When I take a Qlite up to 6A output, Lo is ld a percentage of that new 6A figure, but instead remains the same or very close to it as the original 3A board.


AMC7135 PWM LED control – works?

Thus, if you have 3, your LED will be given mA. I will be sure and keep all that in mind when reconfiguring my Terminator. The time to get stable actually depends on the load capacitance and how fast the source can ramp up the current ESR of source, etc matter too. There is nothing in amf7135 datasheet to hint that the current sink can switch in kHz range usually required in lighting control.

I have this documented in various lights at various total output figures. They are all using a single cell. Not caring about the settling time of the current sink will oed loss of total effective power delivered to the LED.

Excellent info for a newbie. Even give you a headache. Is that because of losses in the additional chips?

AMC – DC LED Driver CC [] : Sunrom Electronics/Technologies

Not only do we not have that we insist on putting them within a few mm of a powerful heat source. If you have the lee for multiple boards, use them and don’t use more than 8 chips each. It did not seem to make any huge difference.


See “exponential decay” or “radioactive decay”. According to the graph posted by ChiggerPepi: However, assuming that the AMC is a a,c7135 based current control system, you must consider the time that the device takes to settle to a stable constant current output.

AMC7135 – DC LED Driver CC

What is the effect of eld more or less of the AMC chips? Is there a better way to find the amperage delivery than regulation chips? Does it mean regardless of modes, I am better off getting a light with less chips if I want longer runtimes instead of am7135 one with more chips at medium and low modes? Each one allows mA. Does the qty of chips need to be even or odd numbered or is there an optimum number?