Hi Team,
My customer's CAR OEM need to pass the ISO16750-2 4.4
http://www.compel.ru/wordpress/wp-content/uploads/2017/05/ISO-16750-22010E-.pdf
Power supply superimposed ripple |
ISO16750-2 4.4 |
The test conditions are as follows: Input resistance: <100 mΩ Test time: 10 min Frequency range: 50Hz-25kHz Duration: 2min Peak-to-peak value: 4 V Working mode: USB play video |
When customer use our TPA6404-Q1 to test this, they also add 100uH and 2200uF in 12Vsupply.
But when they superimposed noise ripple to power supply from 50Hz-25kHz, they could heard that the speaker have output noise.
Their requirement is even having superimposed noise, the ear can't hear the noise from speaker.
Could you please give some advice about passing ISO 16750-2 4.4?
Thanks!