ANALOG INTERNAL SOFT-START AND CLAMP CIRCUIT FOR SWITCHING REGULATOR

摘要

The present invention is an analog circuit and a lamp opening relates to the start (soft-start) circuit to analog for soft switching regulator (for example, step-down converter) which includes the loop analog bolt clamp circuit. The voltage ramp circuit is very low and uses a relatively small capacitor including the integration capacitor for generating a voltage ramp signal in accordance with the very low current signal and the two-stage current-divider circuit for generating a stable current signal. Analog voltage clamp circuit clamps the adjusted output signal until the voltage increases to the level set, the lamp voltage signal group to the lamp voltage, and thereby the output voltage is controlled by the soft-start characteristics exhibit a. An analog clamp circuit clamping device until the level is set, the lamp voltage signal group (e.g., a diode) and a through the current mirror circuit for generating a clamp current to drop the error amplifier output stage. ; An analog clamp circuit, switching regulator