DESCRIPTION
The LT®3751 is a high input voltage capable fl yback controller designed to rapidly charge a large capacitor to a user-adjustable target voltage set by the transformer turns ratio and three external resistors. An optional feedback pin can be used to provide a low noise high-voltage regulated output.

FEATURES
Charges Any Size Capacitor
Low Noise Output in Voltage Regulation Mode
Stable Operation Under a No-Load Condition
Integrated 2A MOSFET Gate Driver with Rail-to-Rail Operation for VCC ≤ 8V
Selectable 5.6V or 10.5V Internal Gate Drive Voltage Clamp
User-Selectable Over/Undervoltage Detect
Easily Adjustable Output Voltage
Primary or Secondary Side Output Voltage Sense
Wide Input VCC Voltage Range (5V to 24V)
Available in a 20-Pin QFN 4mm × 5mm

APPLICATIONS
High Voltage Regulated Supply
High Voltage Capacitor Charger
Professional Photofl ash Systems
Emergency Strobe
Security/Inventory Control Systems
Detonators