BOOSTING SYSTEM FOR IC CARD BY USING CHARGE BOOSTING CIRCUIT AND CONTROL METHOD THEREOF

摘要

PURPOSE: A boosting system for an IC card system and a control method thereof are provided to boost a voltage to a desired level in a short time by using an internal voltage in a case that a voltage higher than an internal operation voltage is needed when an IC card system is driven. CONSTITUTION: The circuit comprises a charge storage(130), a booster(150), switches(140, 141), and a switching controller(120). The charge storage(130) stores the power supplied by a power supplier. The booster(150) boosts the voltage, stored at the charge storage(130), to a desired level, and supplies the boosted voltage for the internal circuit of the IC card system. The switches(140, 141) store the power at the charge storage(130) or supply the power according to a switching control signal. The switching controller(120) transmits the switching control signal to the switches(140, 141) according to an operation mode of the internal circuit of the IC card system. The switching controller(120) determines whether the IC card system is in a simple operation mode or a high voltage operation mode in order to transmit the switching control signal, and detects the charge stored at the charge storage(130).