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US 2010/0164453 A1Published application
Current mode dc-dc converter
AssigneeDongbu HiTek Co., Ltd.
InventorsSung-Hoon Bea, Hwan Cho
Life of this patent
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Abstract
A voltage regulator uses a comparing apparatus having hysteresis characteristics. The voltage regulator includes a comparator for comparing a comparison voltage with a reference voltage, and outputs a result of the comparison; a switching controller for generating a plurality of switching signals in response to the comparison result; resistors connected in the form of a string, to divide the comparison voltage into a plurality of voltages; and a switching box for selecting one of the plural voltages, as the comparison voltage, in response to the switching signals.
Claims20
A device comprising:
- a pulse width modulation signal generator for outputting a power width modulation signal;
- a power switch unit connected between a first voltage and a ground voltage, the power switch unit being turned on or off based on the power width modulation signal;
- and
- a sense amplifier unit for sensing a current flowing through the power switch unit, and outputting a sensing current, the sense amplifier unit controlling the sensing current based on a load control signal,
- wherein the power width modulation signal is controlled based on the sensing current controlled by the sense amplifier unit.
2 more elements
A method comprising:
- outputting a pulse width modulation signal from a pulse width modulation signal generator;
- turning on or off a power switch based on the pulse width modulation signal, the power switch unit connected between a first voltage and a ground voltage;
- sensing, with a sense amplifier unit, a current flowing through the power switch unit, and outputting a sensing current, the sense amplifier unit controlling the sensing current based on a load control signal;
- and
- controlling the power width modulation signal on the sensing current controlled by the sense amplifier unit.
2 more elements
Dependencies are inferred from the claim text.