Part Number: LM3444 Please provide amplifying information for the sin(θ) term in equation 28 from the LM3444 datasheet (SVNS682D), page 20. Specifically, what is the term accounting for when determining minimum voltage present to drive the LED stack.…
Part Number: LM3444 I have a design based on the LM3444 (using the typical application circuit) that is not behaving as specified in the datasheet.
On initial turn on current ramps up in the inductor and overshoots the setpoint applied at the FILTER…
Part Number: LM3444 Other Parts Discussed in Thread: TPS92074 Answer to why LM3444 V buck minimum calculation utilizes sin(θ), page 20, equation 28:
Currently in non-LED load, buck PFC applications, a commonly accepted output voltage that maintains…
Part Number: LM3444 Hi team,
I am working with LM3444 and interested in understanding how to use the FILTER pin for dimming. More specifically, I am interested in using this pin for dimming with a potentiometer. Are there any resources on how to use…
If you are using the LM3444 how do you intend on running it in critical conduction mode? The LM3444 regulates current by off-time control and peak current. It turns on the MOSFET until the current threshold is met then turns off a predetermined time by…
I'm looking at the A19 Edison evaluation board and it says that it's configured to drive 5-13 series LEDs. What is the forward voltage of these LEDs? Or alternately, what is the maximum LED string forward voltage of this reference design? This information…
Hello Brandon,
Before I start. The ground symbol on the LM3444 is not earth ground. The LEDs are driven between the + and - rails which are not tied to earth ground. The (+) rail will have peak voltages of 170 volts every half cycle and the (-) will…
Other Parts Discussed in Thread: LM3444 , LM3466 Hi,
I need review on my schematic. Please help me on this.
Here one schematic. There are two sections. Circuit-1 is taken from your application note snvu114a. I wanted to increase LED capacity to double…
