POWER SUPPLY WITH A SWITCH CONVERTER

摘要

A power supply has a switch converter, a circuit breaker, a storage inductor and a peak current controller, wherein a first shunt resistor is arranged in a positive cable, a first operational amplifier is connected the first shunt resistor to detect a voltage drop across the first shunt resistor, an auxiliary measuring signal at the output of the first operational amplifier is reflected via a current mirror to ground, a second operational amplifier is connected to the second shunt resistor for impedance amplification such that a DC measuring signal is present at the output of the second operational amplifier, an RC element having a resistor and capacitor is connected to an inductor, the RC element being configured such that an AC measuring signal at the output of the RC element reproduces a current through the storage inductor, and where the AC measuring signal is added to the DC measuring signal.

主权项

1. A power supply including a switch converter, and which is connectable to an input-side voltage by a positive cable and to a ground potential by a negative cable, the power supply comprising:
a circuit breaker; a storage inductor; a peak current controller; a first operational amplifier; a first shunt resistor arranged in the positive cable and connected to the first operational amplifier to detect a voltage drop across the first shunt resistor; a second shut resistor; a current mirror which reflects an auxiliary measuring signal at the output of the first operational amplifier via the second shunt resistor onto the ground potential; a second operational amplifier connected to the second shunt resistor to provide impedance amplification such that a DC measuring signal is present at an output of the second operational amplifier; and an RC element comprising a resistor and capacitor, the RC element being connected to the storage inductor and configured such that an AC measuring signal at an output of the RC element reproduces a current through the storage inductor, the AC measuring signal being added to the DC measuring signal.