Sleeping time ni newborn

Ilang hours ang normal sleeping time duration ni baby? Yung baby ko kasi, 1 week old, Tulog mula 11am to 8pm. Ginigising ko lang sya kaag dedede every 4 hours or diaper change. Tapos bangdang 10pm-12mn naman ay light sleep. Then 1 am-3 am or 4 am ay gising or hirap makatulog. Is it normal mga mamsh?