Invention Grant
US08885308B2 Input control apparatus and method with inrush current, under and over voltage handling 有权
具有浪涌电流,欠压和过压处理的输入控制装置和方法

Input control apparatus and method with inrush current, under and over voltage handling
Abstract:
Control circuitry handles inrush current, and may provide under voltage and/or over voltage monitoring and handling, as well as remote enable handling. The circuitry may advantageously employ a sense capacitor in parallel with an input capacitor (e.g., bulk input filter capacitor), and a current mirror to produce a signal proportional to input current. A clamp circuit may control a series pass device to regulate current in response to the proportional signal, or to interrupt current flow in response to an under voltage or over voltage condition or receipt of a signal indicative of a disable state. An enable signal may be summed into a comparator that handles under voltage condition determination.
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