应用笔记 1147

Simple Current Source Varies the Switching Frequency of a Power Supply for a Digital Still Camera


摘要 : This application note shows how a simple, discrete current source can determine oscillator frequency. Design uses the MAX1802 step-down power supply to vary the switching frequency for a digital still camera (DSC), video camera, or a PDA. In this design the input voltage varies from 2.6V to 5.5V to cover the use of Li+ battery or an adapter as input to the MAX1802.