  Thermodynamic properties of Schwarzschild-Anti de-Sitter (Sch-AdS) and
Reissner-Nordstr\"om-Anti de-Sitter (RN-AdS) blackholes in 3+1 dimensional
spacetime are studied critically with special reference to the warped
braneworld black holes with non-vanishing cosmological constant on the brane.
Explicit dependence of the thermodynamic variables on the parameters of the
braneworld model such as the induced three brane cosmological constant as well
as the bulk cosmological constant have been determined. Hawking-Page phase
transition has been discussed for both Sch-AdS and RN-AdS black holes. At the
phase transition point it is shown that the parameters mass, charge and
cosmological constant get correlated by an inequality relation which originates
from the background warped geometry model.
