Patent ID: 7982447
Filing Date: 2011-07-19
Classification: H02M

Abstract:
1. In a switched mode power supply having an error amplifier coupled to an output voltage of the switched mode power supply and a compensated feedback loop, an input circuit comprising: a first resistor divider having one end coupled to the output voltage and a tap coupled to an input of the error amplifier for providing a signal representative of the output voltage to the error amplifier during steady-state conditions; a second resistor divider having one end coupled to the output voltage and a tap for providing a signal representative of the output voltage during a transient condition, the second resistor divider having a lower resistance than the first resistor divider; a switch coupled between the tap of the second resistor divider and the input of the error amplifier and coupling the tap of the second resistor divider to the input of the error amplifier during transient conditions.