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LED驱动器应用中升压转换器的简单开路保护

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LED驱动器应用中升压转换器的简单开路保护
Texas Instruments Incorporated Power Management




Simple open-circuit protection for boost
converters in LED driver applications
John Caldwell, Analog Applications Engineer,
and Gregory Amidon, Analog Field Applications Engineer
Introduction boost configuration, the output voltage, VOUT, is monitored
One method for driving high-brightness LEDs is to modify by using a voltage divider to produce a feedback voltage,
the standard boost-converter topology to drive a constant VFB, for the circuit. The converter regulates the output
current through the load. However, there is a major prob- voltage to keep VFB equal to the on-chip ref……
LED驱动器应用中升压转换器的简单开路保护
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