LT3750AEMS#PBF

LT3750A 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, this device can operate from a variety of power sources. A typical application can charge a 100µF capacitor to 300V in less than 300ms. The CHARGE pin gives full control of the device to the user. The DONE pin indicates when the capacitor has reached its programmed value and the part has stopped charging. It is used in application like emergency warning beacons, professional photoflash systems, security/inventory control systems, high voltage power supply, electric fences, detonators etc.

• Charges any size capacitor
• Easily adjustable output voltage
• Drives high current NMOS FETs
• Primary-side sense—no output voltage divider necessary
• Wide input voltage range is 3V to 24V
• Drives gate to VCC -2V
• VCC quiescent current is 1.6mA typical at (not switching, CHARGE = 5V)
• GATE turn off propagation delay is 100ns typical at (CGATE = 1nF)
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic MSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party