Design of a Photoflash Charger System with a Controllable Charge Time for Digital Still Cameras

This paper proposes the off-line fly back circuit structure together with the integrated control circuit, which can control the charge circuit and reduce the charge time for the flashlight of digital still cameras. The advantage of this control structure is better than the conventional RCC charge circuit. Moreover, the structure has a small volume, high efficiency and optimal control charge time. Nowadays, the system is very suitable for digital still cameras that require simple, small and highly efficient components. Recently, the similar integrated IC which has uniqueness by itself is made in succession. Measured waveform can be obtained from the experiment so that successful performance of this method can be verified and competitiveness can be proven.