Load driving system and method thereof
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United States of America Patent
Stats
-
Dec 9, 2003
Grant Date -
Sep 26, 2002
app pub date -
Mar 25, 2002
filing date -
Mar 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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