1. S

    LM3429: LED driver make a lot of noise on FM-radio

    Hi, everyone! I've made a LED buck-boost (BB) driver based on LM3429. It's for automotive lighting, so Vin = 9-14.5 V, LED string consist of 10 white leds. V_out is about 30V, I_out=1.3A. All components were calculated according to LM3429 datasheet for BB topology. All datasheet recommendations...
  2. E

    Controller gets hang on Relay switching

    I am using a relay to turn ON/OFF the AC load. But when i turn ON and turn OFF the AC load (230 VAC) 3-4 times my controller gets hang. Here is my circuit diagram for the relay. The ground is common in all over schematic. What changes do I need to do for improving the noise?
  3. M

    Who Knows MOSFETs - Can Noise be Reduced? (Dimmer circuit)

    Hi, I created the following circuit here. The DIM Control Pin sources a 10uA current. I am getting 0.5V of noise on that pin (looking at the oscilloscope). It probably has to do with the GNDA being connected to the MOSFETs. And probably to do with my PCB layout. Currently, I don't have...
  4. A

    Three-phase EMI filter. LTspice

    Hello. Could you help me understand how to create a three-phase EMI filter? For example, I chose a full-bridge inverter with parameters P = 100kW, f_switch = 100 kHz. The noise measurement is performed using the LISN. The results of the simulation (calculation time 0-50ms) In this graph...
  5. pratyush13

    How does Noise is effected by inverter switch technique, output current, modulation index?

    How is the noise on the supply side effected by DC bus voltage, rise and fall (di/dt, dV/dt), switching frequency and techniques, modulation index and load current? Is there any formula or analysis we can do? Analytically?