US 2024/0405672 A1 · LOAD DRIVING DEVICE

Abstract

A load driving device includes a step-up converter for raising a voltage provided by a power supply and supplying same to a load unit, by comprising a first driving unit and a second driving unit, the first driving unit comprising an inductor and a first fly capacitor, and charging energy provided by the power supply, as the inductor and the first fly capacitor are connected in parallel in a first phase, and discharging the charged energy, as the inductor and the capacitor are connected in series in a second phase, and the second driving unit comprising a second fly capacitor for charging energy provided by the power supply in the second phase and discharging the energy charged in the second phase; and a current control unit for controlling a current provided to the load unit by detecting the current flowing in the load unit and controlling the step-up converter.

Claims18

Dependent claims

A load driving device comprising:

a step-up converter which includes a first driving unit including an inductor and a first fly capacitor and configured to charge energy provided from a power supply by connecting an inductor and a first fly capacitor in parallel in a first phase and discharge the charged energy by connecting the inductor and the first fly capacitor in series in a second phase, and a second driving unit including a second fly capacitor configured to charge energy provided by the power supply in the second phase and discharge the energy charged in the first phase, which boosts a power supply voltage provided by the power supply and provides the power supply voltage to a load unit;
and
a current controller configured to detect a load current flowing in the load unit and control the step-up converter to control a current provided to the load unit.

A load driving device comprising:

a bipolar driving unit configured to receive a power supply voltage from a power supply and output a negative driving voltage and a positive driving voltage in different phases;
and
a current controller configured to detect a load current provided to a load by the bipolar driving unit and generate a control signal for controlling the bipolar driving unit,
wherein the current controller includes:
a detection voltage generating unit configured to generate a detection voltage corresponding to the load current from a scaled-down current generated by scaling the load current down;
a low-pass filter configured to receive the detection voltage and generate and output a detection signal corresponding to an average of the load current;
and
a control signal generating unit configured to generate a control signal for controlling operations of the first driving unit and the second driving unit from the detection signal.

5 more elements

Dependencies are inferred from the claim text.

Load driving device

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Load driving device

Life of this patent

Abstract

Claims18