Load driving system and method thereof
AssigneeYazaki Corporation
InventorsYasuhiro Tamai, Tetsuya Hasegawa
Life of this patent
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Abstract
A system and method for driving a load at a voltage higher than a normal driving voltage, being capable of reducing switching losses and heat generation amount. A load driving system 1 has a microcomputer 2, a DC/DC converter 3, and a semiconductor relay 5 provided to each lamp 4 as a load. The DC/DC converter 3 has a main switch 6, an auxiliary switch 7, and a resistor R1. A rectangular pulse signal at a desired duty ratio is given to the main switch 6 to turn the main switch 6 on and off, thereby to output a rectangular waveform voltage. A drive signal is given to the semiconductor relay 5 to supply the rectangular waveform voltage outputted from the DC/DC converter 3 to the lamp 4, illuminating the lamp 4.
Claims11
A driving system connected to a DC power source which supplies a predetermined output voltage, for driving at least one load, comprising:
- a voltage converter having a first switch adapted to convert a voltage outputted from the power source to a pulse voltage having a desired duty ratio for output, the first switch being adapted to generate the pulse voltage in response to a first control signal;
- and
- a second switch connected between the voltage converter and the load, the second switch being adapted to turn on and off in response to a second control signal.
A driving system connected to a DC power source which supplies a predetermined output voltage, for driving at least one load, comprising:
- a voltage converter having a first switch adapted to convert a voltage outputted from the power source to a pulse voltage having a desired duty ratio for output;
- and
- a second switch connected between the voltage converter and the load, the second switch being controlled to switch from an off state to an on state during an off state of the output of the voltage converter.
A method for driving at least one load using a DC power source supplying a predetermined output voltage, comprising the steps of:
- converting a voltage outputted from the power source to a pulse voltage having a desired duty ratio for output;
- and
- selectively switching between conductive and non-conductive states of the pulse voltage to the load in response to a control signal;
- wherein,
- to make the load in a conductive state, the control signal is outputted to switch from the non-conductive state to the conductive state during an off state of the pulse voltage.
Dependencies are inferred from the claim text.