Other Parts Discussed in Thread: TL4242 I have a customer (Raytheon) using the TL4242 LED driver. He is driving a single LED at 20mA, using a 9.1 ohm resistor for the current sense resistor. The LED forward voltage varies from 2.2 to 3.8 and the power…
Hello,
Please see the attached file.
2860.20140220_TL4242 switching the shunt resistor.pdf
My customer change the LED current by switching the shunt resistor of REFpin by FET.
In this case are there any problem ?
I believe that , there…
Hello,
Sorry for bothering you. But please let me have the reply.
I updated the information as below.
ST pin is connected to PWM pin.Thus, TL4242 output is latched off when ST pin asserted Low. In this case, the led do not light again until power…
Hi Tibor,
Just to make sure that I have understood your idea correctly, is this what you had in mind for the 6 strings?
If so, then this solution will work. If you want to control all 6 TL4242 devices as a single unit, you can tie the PWM pins…
Other Parts Discussed in Thread: TL4242-Q1 Hello, Our customer evaluate TL4242-Q1 by the following conditions. Could you please let me know recommended pcb rayout or example ? --- Vin:9V to 16V Iout:450mA Vf(max) : 3V LED : 2series --- In this condition…
Other Parts Discussed in Thread: TPS92630-Q1 , TL4242-Q1 , TPS92638-Q1 Hello, Could you please let me know the minnimum regulation current of TPS92630-Q1 / TL4242-Q1 ? I understood that this device outoput current(min) is 10mA/ch. However our customer…
Other Parts Discussed in Thread: TL4242 , TLC555 I am working on a lighting solution for a small retail building where I wish to use 600 24v 7w LEDs in four separate arrays. The configuration of each array I want to use is as follows: 1) one transformer…
Other Parts Discussed in Thread: TL4242 , MSP430G2102 , LM2623 , LMR61428 Hello,
Currently I need to use LM2623, TL4242 and MSP430G2102.
How and where would get the models?
if not available, can one create the required models?
Best regards,
…
