DC/DC Capacitor Charger Controller, Flyback, High Voltage, 4.75 V to 24 V, 1 Output, QFN-20

LT3751IUFD#PBF - DC/DC Capacitor Charger Controller, Flyback, High Voltage, 4.75 V to 24 V, 1 Output, QFN-20

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Product Overview

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


Lighting, Security, Power Management

Product Information

1 Output
MSL 1 - Unlimited
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