Motor driven power steering and method for driving the same

A motor driven power steering (MOPS) may include: a vehicle speed sensor (10) configured to sense vehicle speed; a temperature sensor (40) configured to sense a temperature of a power pack; a current sensor (50) configured to sense an amount of current applied to the MDPS; a storage unit (60) configured to store a thermal resistance value based on the vehicle speed with respect to the temperature of the power pack; and a control unit (70) configured to calculate an estimated temperature by reflecting the thermal resistance value based on the vehicle speed with respect to the temperature of the power pack and the current amount applied to the MDPS into a temperature estimation function, and drive a motor (80) according to the calculated estimated temperature.