The Control Circuit for Currnet Progammed Control Swiching Mode DC-DC Converter

摘要

The present invention relates to a control circuit of the current driving a switch-mode DC-DC converter, a current-driven Converter system for the inductor current of the detection method, the sub-harmonic oscillation (Sub-Harmonic Oscillation) to prevent the occurrence of the signal for the generation of Artificial Ramp method Artificia Ramp signal of the line as well as to improve the transient response for the DC-DC converter to the control It relates to a circuit. According to the present invention more specifically, the inductor current (I _L ) in order to detect the common gate amplifier (M _N1 ) of a structure of a boost converter (Boost Converter) a current detection unit for; The current waveform detected by the current detector, a predetermined input through the VI converter voltage (V _IN ) and generates a predetermined current (I _ART ) with the ramp signal is generated by adding the sub-harmonic oscillation (Sub-harmonic Oscillation) light signal to compensate for the generator; And a common gate amplifier (M _N1 ) of a current flowing into the drain stage (I _CS ) by copying the common gate amplifier with a current mirror structure of the current detecting unit ( M _N1 ) re-introduced into the drain currents compensation unit for the stage; It provides a control circuit of the current driving the switch mode DC-DC converter comprising a. Further, according to another aspect of the present invention, buck-boost converter (Buck-Boost Converter) of the inductor current (I _L ) of the common gate amplifier in order to detect (M _P8 ) current detector having a structure; The current waveform detected by the current detector, a predetermined input through the VI converter voltage (V _IN ) and generates a predetermined current (I _ART ) with the ramp signal is generated by adding the sub-harmonic oscillation (Sub-harmonic Oscillation) light signal to compensate for the generator; And the common gate amplifier with a common gate amplifier, copy (M _P8 ) the drain current flowing to the stage (I _CS ) of the current mirror structure of the current detecting unit ( M _P8 ) current compensation unit that re-introduced into the source end; It provides a control circuit of the current driving the switch mode DC-DC converter comprising a.