Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 (if the system wokrs, there must be a link somewhere to a related question.... ) I ran into the same issue: The LM3409 draws current from the IADJ pin when EN is low. This current is much larger…
Hello,
EN dimming turns the gate off and on, the inductor limits the slew rate of the current so it will be much less "noisy". Shunt FET dimming is shunting the LED current through the shunt MOSFET, the transition is fast and will cause high di/dt which…
Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Hello,
we are experimenting unexpected second toff using LM3409HV. The schematic is reported below, please note that R3 is not fitted, then Rsns=0.3ohm. The IADJ pin is controlled to have…
Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Dear TI : My cusomer used LM3409HV for PWM dimming lighting design, when they do EMI test, the RE is a little over the limit.
Customers try many methods to optimize EMI, then they found that…
Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Tool/software: WEBENCH® Design Tools Hi,
I am trying to drive a 6A load with LM3409HV & it does not work. One of the devices had be replaced and then it worked for a 4A load. I am using,…
Part Number: LM3409HV Hello,
Consider a situation with two batteries of 1 kWh - with different state of charge (SoC), for example with output voltages of 65V and 55V. What we want is a solution when the higher SoC battery discharges into the lower SoC…
Part Number: LM3409HV Hi Team,
Customer is using LM3409HV and in the application they have now, the input of UVLO on LM3409HV can be connected to GND at some time.
But from datasheet figure 28, inside UVLO pin is a constant current source. Will it…
Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Hi,
I use 10 buck LM3409HV for driving 10 strings of 10 led (Vin = 48V and iled = 2.5 A)
each LM3409HV are managed by DAC (for analog dimming) or by PWM or both.
PWM frequency : 20 khz…
Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 I'm trying to apply the design example in the users guide for the LM3409HV Evaluation Board (SNVA390D/AN-1953). I must be doing something wrong, so have a couple of questions.
In the application…
