Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

EMI Suppression Filters (EMC and Noise Suppression)Examples of measures to suppress noise in USB 2.0 mode CISPR25 Class 5 power lines

Details of noise suppression measures taken in USB 2.0 mode

The same power lines are used in both operation modes equivalent to USB 2.0 and the SuperSpeed operation mode that is the USB 3.0 full standard.
This means that components supporting the 900 mA current in compliance with the USB 3.0 standard are required.

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

BLM31PG601SH1 chip ferrite beads inserted into power (Vbus) line

Click hereOpen in New Windowfor details of the measurement conditions.

Noise measurement results (for measures to suppress noise in USB 2.0 power lines)

BLM31PG601SH1 used

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles
  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehiclesBy adding chip ferrite beads (BLM31PG601SH1), the noise was successfully reduced (approx. 14 dB reduction at a horizontally polarized wave frequency of 76 MHz and approx. 13 dB reduction at a vertically polarized wave frequency of 227 MHz).
  • <Measures to suppress noise in power lines>