A sheriff's spokesman said the 44-year-old R&B singer was released after eight hours and outfitted with an electronic ankle monitor Thursday because of jail overcrowding and good behavior.
A spokeswoman for Brown said he is at home with his family.
Brown pleaded no contest to DUI and driving on a suspended license in February and turned himself in Wednesday. He will be required to serve four years on informal probation and complete an 18-month alcohol treatment program.
The conviction is Brown's second for DUI in less than a year. He avoided jail after pleading no contest to a March 2012 drunken driving case.