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High Voltage Capacitor Charger Controller with Regulation
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LT3751
High Voltage Capacitor
Charger Controller with Regulation
FEATURES DESCRIPTION Charges Any Size Capacitor
nn Low Noise Output in Voltage Regulation Mode
nn Stable Operation Under a No-Load Condition
nn Integrated 2A MOSFET Gate Driver with Rail-to-Rail
Operation for VCC ≤ 8V
nn Selectable 5.6V or 10.5V Internal Gate Drive
Voltage Clamp
nn User-Selectable Over/Undervoltage Detect
nn Easily Adjustable Output Voltage
nn Primary or Secondary Side Output Voltage Sense
nn Wide Input V
CC Voltage Range (5V to 24V)
nn Available in 20-Pin QFN 4mm × 5mm and 20-Lead
TSSOP Packages The LT®3751 is a high input voltage capable flyback controller designed to rapidly charge a large capacitor to a
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. nn APPLICATIONS 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 …