LT3751IUFD#PBF

LINEAR TECHNOLOGY  LT3751IUFD#PBF  芯片, 电容充电控制器, 20QFN

The is a high input voltage capable Flyback Controller designed to rapidly charge a large capacitor to user-adjustable high target voltage set by the transformer turns ratio and three external resistors. Optionally, a feedback pin can be used to provide a low noise high voltage regulated output. The LT3751 has an integrated rail-to-rail MOSFET gate driver that allows for efficient operation down to 4.75V. A low 106mV differential current sense threshold voltage accurately limits the peak switch current. Added protection is provided via user-selectable overvoltage and undervoltage lockouts for both VCC and VTRANS. A typical application can charge a 1000µF capacitor to 500V in less than one second. The CHARGE pin is used to initiate a new charge cycle and provides ON/OFF control. The DONE pin indicates when the capacitor has reached its programmed value and the part has stopped charging.

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Charges any size capacitor

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Low noise output in voltage regulation mode

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Stable operation under a no-load condition

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User-selectable over/undervoltage detect

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Easily adjustable output voltage

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Primary or secondary side output voltage sense