DLW5BTM series

Noise suppression technologies/case study introduction (Consumer)
INDEX
Since the high noise level on the power line and ground line causes noise to be emitted from the cable, inserting common mode choke coils before the USB connector on the output side of the DC-DC converter is likely to be effective.
DLW5BTM series
common mode choke coil chip
The DLW5BTM series supports current levels up to 6 A and provides high impedance at frequencies up to 1 GHz, making it ideal for this application.
We confirmed the effectiveness of common mode choke coils in curbing noise suppression on the evaluation board.
We inserted the DLW5BTM142TQ2 on the power line and ground line.
(Due to the processing conditions, we cut the power line and ground line of the cable for this evaluation.)
We confirmed that by inserting DLW5BTM142TQ2 common mode choke coils, noise was reduced by up to 10 dB in the 100~300 MHz range where the emission noise level is highest.
DLW5BTM series
Common mode choke coils are filters that reduce common mode noise.
They do not affect signals (due to their high cutoff frequency) and are ideal for eliminating common mode noise at frequencies ranging from several megahertz to several hundred megahertz.