Ex-Disney star Orlando Brown﻿ pulled into a police station parking lot while arguing with his girlfriend and then allegedly struck her, while he had meth on him.

Law enforcement sources tell us the bizarre incident went down in January in Torrance, CA when someone using a nearby ATM spotted the "That's So Raven" star in the car. We're told the witness saw the couple arguing and called police ... who were conveniently located.

Brown initially refused to leave his car, according to our sources -- but once cops got him into jail, they found methamphetamine on him. We're told his girlfriend was not seriously injured.

Brown's been charged with misdemeanor domestic battery, obstruction of justice and 2 felonies -- drug possession with intent to sell, and having contraband in jail.