Power Control is essential for CDMA based Mobile Communication Systems. Power Control treats the near far problem, enhances the coverage and the capacity and overcomes fading. Adaptive Power Control improves the system performance in case of severe fading conditions. This paper considers the design of the Power Control module of TD-SCDMA system in fast fading condition. A closed loop adaptive step size power control algorithm is suggested. The proposed power control module can be easily implemented within the TD-SCDMA chipset.