Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.
Hi Krupali,
I have talked with my colleagues. We think that although it is more common to place the class Y capacitor between the primary-side GND and secondary-side GND, it is also ok to place it between primary-side rectified power line and secondary…
Part Number: LM3447 Hi,
As per LM3447-PAR-230VEVM Schematic, rectified AC is connected to transformer pin no.1 and is connected to signal ground...
is it correct?? or transformer pin no 14 should be connected to auxiliary winding pin no. 4 through capacitor…
Part Number: LM3447 Hello, We're going to design a dimmable led driver. This circuit needs to be isolated(flyback topology) and operates at 30 to 50 watts. The LED chipset is COB 50W(28v-32v and max current 1500ma) but we can change the chipset to other…
Part Number: LM3447 Hi Power management team,
I am Eric, FAE based in Vietnam. One of my customer are working on "LED Lighting Dimming" project.
They use our LM3447 as a controller for LED lighting in their design. The Pout (LED Driver Output…
Part Number: LM3447-A19-120VEVM Other Parts Discussed in Thread: LM3447 Hello,
I am testing the LM3447-A19-120VEVM evaluation board to check the performance with different triacs. The IC works well but has a one major issue which I am trying to resolve…
Part Number: LM3447-A19-230VEVM hello i was wondering if someone could explain me the unusual LC filtering configuration used in the emi filter. It resembles a 4th order LC filter but is placed across the ac input.
Part Number: LM3447 Hello! The project is implemented on the device LM3447. The input voltage is 230AC 50 Hz. Load 16DC, 300 mA (4,8 W). However, at low brightness levels of 10-20% there is a slight flicker of the LEDs with a frequency of about 5-15 Hz…
Part Number: LM3447 Other Parts Discussed in Thread: TPS92075 Hello,
I have a doubt regarding the "Hold Current" circuit in the phase dimmable PFC flyback controller: LM3447 (or any similar phase dimmable PFC flyback controllers).
Datasheet…
