City attorney's spokesman Frank Mateljan says Brown was sentenced Tuesday after pleading no contest to charges he was under the influence and driving on a suspended license when he was arrested in October.
Brown was on probation for another DUI case at the time.
The 44-year-old "New Edition" singer was ordered to report to jail March 20. He also was placed on four years of informal probation and will be required to complete an 18-month alcohol treatment program.
Brown's attorney Tiffany Feder had no immediate comment on the sentence.
The sentence was first reported by celebrity website TMZ.