DESCRIPTION

The LT®3750 is a flyback converter designed to rapidly charge large capacitors to a user-adjustable target voltage. A patented boundary mode control scheme minimizes transition losses and reduces transformer size. The transformer turns ratio and two external resistors easily adjust the output voltage. A low 78mV current sense accurately limits peak switch current and also helps to maximize efficiency. With a wide input voltage range, the LT3750 can operate from a variety of power sources. A typical application can charge a 100µF capacitor to 300V in less than 300ms.

FEATURES

■ Charges Any Size Capacitor
■ Easily Adjustable Output Voltage
■ Drives High Current NMOS FETs
■ Primary-Side Sense—No Output Voltage Divider Necessary
■ Wide Input Range: 3V to 24V
■ Drives Gate to VCC– 2V
■ Available in 10-Lead MS Package

APPLICATIONS

■ Emergency Warning Beacons
■ Professional Photoflash Systems
■ Security/Inventory Control Systems
■ High Voltage Power Supply
■ Electric Fences
■ Detonators