LT3751IUFD#PBF Datasheet PDF - Linear Technology

●The LT3751IUFD#PBF 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.

● Charges any size capacitor

● Low noise output in voltage regulation mode

● Stable operation under a no-load condition

● User-selectable over/undervoltage detect

● Easily adjustable output voltage

● Primary or secondary side output voltage sense