ZHCS389C June 2011 – December 2022 DRV8662
PRODUCTION DATA
The current limit of the boost switch may be adjusted via a resistor to ground placed on the REXT pin. The programmed current limit should be less than the rated saturation limit of the inductor selected by the user to avoid damage to both the inductor and the DRV8662. If the combination of the programmed limit and inductor saturation is not high enough, then the output current of the boost converter will not be high enough to regulate the boost output voltage under heavy load conditions. This will, in turn, cause the boosted rail to sag, possibly causing distortion of the output waveform.