Part Number: LM3421 Hi Ti Team，
1， I use LM3421 to do a step-down parallel dimming. Figure 1 is my test PWM dimming and main switching waveforms. Is the following figure normal? The schematic diagram is refer to Figure 2
Figure 1：
Figure 2,
2,There…
Part Number: LM3421-Q1 Other Parts Discussed in Thread: LM3421 Hi, TI Support Team
OVP is not working properly.
Please review the contents below.
Applicaton: LOWBEAM HEADLAMP
TOPOLOGY: BUCK-BOOST
VIN : 10~36V
VLED: 17V
ILED: 1A
OVP TARGET: VIN + VLED…
Part Number: LM3421
Figure1: LM3421 Boost application
I am redesigning the LED driver circuit on the PCB which provides a constant current of 0.9 to 1A to the LED module. On my PCB I have 4 repeated lamp driver circuits. Every circuit uses the same components…
Hi Irwin,
Thank you so much! You pointed me the source of the problem. I have to reduce R_LIM to around 20 mR, I was just missing the right formula. With a 22 mR I had left and the appropriate dissipator I reach 3.2A.
Thank you again.
Best regards.
Note…
Part Number: LM3421 dear
If there have LM3421 low ripple current sulotion such as sch or calculated inductance excel? performace details show as below:
Input above 48V, output 43V, average current 3A, ripple current maximum plus or minus 200mA, thanks…
Part Number: LM3421 Hi,
Could you please check the SEPIC application circuit in Datasheet? I believe the L2 direction is incorrect. Is it correct direction?
Usually, SEPIC circuit seems to be as below.
Regards, Nagata.
Part Number: LM3421 HI All，
Can I make 300W for lm3421?If not, can you recommend a suitable model?The requirements are below：
Vin=24V-35V
Vout=50V6A
PWM or Analog dimming
