Simon,
The PWM pin has a pull-down to assure that the output (Q) is disabled unless intentionally pulled high. If the pin is left floating, it will pull low and no current will go through the device. There are several things that impact the current…
The TL4242 is capable of supporting a 500mA load. The datasheet graph was taken with the TL4242 set to sink 375mA of current through three LEDs. The output current is less than 375mA at the lower voltages because the input voltage is not high enough to…
Other Parts Discussed in Thread: TL4242 I need to limit a higher current than what the TL4242 can handle (up to 1.5A).
Would it be possible to "stack" 3 TL4242 (connect I, ST, PWM, D, Q and REF)?
Would R_ref then just be one third of what it would…
Hi Rajesh,
The most suitable device according to your requirement is the TL4242: https://www.ti.com/product/TL4242?keyMatch=TL4242&tisearch=Search-EN-everything&usecase=GPN
Could you check whether it can meet your requirement?
BR
Sean
Other Parts Discussed in Thread: TL4242 Hi,
I want to find a LED dimming control solution, I would like to know if TL4242 is suitable for our design.
Our LED specification as below,
The voltage supply to the solution can be 3.3V,5V or 12V. (Based…
Part Number: TPS92515-Q1 Other Parts Discussed in Thread: TL4242-Q1 , TPS92513 Hi team,
I am looking for a LED driver who has <100uA standby current capability at PWM = Low.
VLED=3.5V
ILED=350mA
Vin = either 12V(car battery) or 5V or 3.3V
I…
HI, Hirotaka Matsumoto,
If you don't mind about difference in the brightness your solution could work. But in this case may be better to use something simpler for the current source. Something like LDO in the current source circuit or TL4242.
