Part Number: LM3405 Other Parts Discussed in Thread: LM3410 Hi Sir,
our customer want to use LED Cree XPL (800lm),
But, we can’t found out the best solution for flashlight application.
Do you have any suggest for this Spec?
Vin 3V~4.2
Vout 3.16…
Part Number: LM3405 Dear all,
Could you teach about the way to set the ratio of ripple current to LED current?
You say that 'The ratio of ripple current to LED current is optimized when it is set between 0.3 and 0.4 at 1A LED current.'.
And…
Part Number: LM3405 Dear all,
At 'Setting the LED Current' section, you recommend to use above 200 mA for stable operation and to use PWM dimming less than 200mA.
Why should we use this device above 200mA with resistor setting? and Why does this…
Part Number: LM3405A Other Parts Discussed in Thread: LM3405 , , TPS92515 , TPS92518 , LM3409 Hello,
we use in our application 2 LM3405 devices.
Each of the LM3405A drives a Group of 4 LED´s in series.
Both of the LM3405A get the same PWM-Signal at the…
Part Number: LM3404 Other Parts Discussed in Thread: LM3405 Hi,
we have an application where we want to use the LM3404 to drive one or multiple LED string in parallel. The LED strings are remote. We want the same current on all the strings. To get that…
Other Parts Discussed in Thread: LM3405 HI Team,
I would like to know the minimum duty of PWM dimming of LM3405.
I could find graph of average LED current vs Duty Cycle of PWM Dimming sigal at EN/DIM pin.
I think the graph plots down to about 5%? likely…
Other Parts Discussed in Thread: LM3405 Hello!
I'm having problems with font based on lm3405.
I have the boost derived from a 4.7V zener with a capacitor .01uF
capacitors are (following the data sheet naming):
C1= 10uF C2 = C5 = 1uF
the inductor is…
Other Parts Discussed in Thread: LM3405
We use LM3405 .
error phenomenon(condition : Vin is the state that is still supplied)
When Dimming off, is maintained in a state in which the LED is faintly conduct.
Test Condition
: The same phenomenon can…
hi kim
Glad to hear that. Would you mind my asking the application here for LM3405 and why this is chosen? Does the reason is that this can support Vin down to 3V?
Other Parts Discussed in Thread: LM3405 Hi,
I am trying to drive constant 1A current using LM3405 connected to a single OSRAM IR LED "SFH 4715" .
Below is the circuit using which I am trying to achieve the above:
Setup I used:
VIN = 5V
EN/DIM…