Power converter with ability for negative current and a low quiescent current usage

摘要

This application relates to a power converter for converting an input dc voltage into a dc output voltage. The power converter comprises: an output node, a passage means, which, with the output node of the power converter is connected, whereby the passage means is configured in accordance with a pwm - signal to operate and at least one part of a output current of the power converter to provide a pwm - comparator for generating the pwm - signal for controlling the operation of the passage means according to a current conducted through the passage means and a difference between an output voltage of the power converter and a reference voltage, wherein the pwm - comparator a first input terminal and a second input terminal, a first current detection circuit for outputting a first detection of current in a function of the current conducted through the passage means, wherein the first current detection circuit is configured for this purpose, the current conducted through the passage means to detect when the current passed through the passage means a given polarity, the first current detection circuit further comprising the pwm - comparator connected in such a way that a voltage as a function of the first forward direction detection current to the first input terminal of the pwm - comparator is supplied, and a second current detection circuit for outputting a second detection current in a function of the current conducted through the passage means, wherein the second current detection circuit is configured for this purpose, the current conducted through the passage means to detect when the current passed through the passage means of a polarity opposite to the given polarity, wherein the second current detection circuit further comprising the pwm - comparator connected in such a way that a voltage as a function of the second forward direction detection current to the second input terminal of the pwm - comparator is supplied to.