DC1280A

LINEAR TECHNOLOGY  DC1280A  演示板, LT3471 开关稳压器

demonstration board is a dual output converter featuring LT3471EDD in boost and converter configuration. The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. Both converters are powered from the same 4.5V to 10V input source. The boost converter outputs 12V at 300mA and the inverter outputs -12V at 200mA. The LT3471 operates with inputs as high as 16V but in this demo board the input is limited by the magnitude of the boost output. In a Boost converter the input needs to be less than the output. The DC1280A is designed so that the inverting converter can easily be configured as a boost. Both circuits are designed to demonstrate the soft start feature, advantages of the 1.2MHz switching frequency and the internal 42V/1.3A switches. Both outputs on this demo board can be modified for higher voltages.

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1.2MHz switching frequency

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High output voltage of up to 40V

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Wide input range from 2.4V to 16V

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Inverting capability

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5V at 630mA from 3.3V input

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12V at 320mA from 5V input

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-12V at 200mA from 5V input

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Low shutdown current