Implantable medical device and power controlling method thereof

An implantable medical device interworking with an external terminal having a primary coil, the implantable medical device comprising;

• a secondary coil configured to receive an RF signal from the external terminal by an induction of an induced electromotive force between the primary coil and the secondary coil, the RF signal including a power signal for energizing the implantable medical device and a data signal generated upon modulation of the power signal for use in controlling the implantable medical device;
• a power processing block configured to convert the received power signal into a DC power to be used by the implantable medical device;
• a charge unit configured to charge a battery with the DC power supplied from the power processing block;
• a communication signal detector configured to detect the data signal;
• a data communication circuit configured to be energized by the DC power supplied from the power processing block while the data signal is detected and to demodulate a modulated data;
• and
• a control unit configured to be energized by an operation power supplied from the battery, to control the implantable medical device according to a demodulated data signal, and to selectively connect or disconnect the power supply from the battery depending on the presence of the data signal detected by the communication signal detector.

A power control method for an implantable medical device, comprising:

• detecting an RF signal induced from a primary coil provided at an external terminal to a secondary coil provided at the implantable medical device, the RF signal including a power signal for energizing the implantable medical device and a data signal generated upon modulation of the power signal for use in controlling the implantable medical device;
• supplying a control unit, in response to a detection of the data signal, with an operation power from a battery of the implantable medical device, and supplying a data communication circuit for communicating with the external terminal with a DC power from a power processor after a conversion from the RF signal;
• and
• cutting off a power supply to the control unit and the data communication circuit in the absence of the detection of the data signal.