LT3750 Datasheet | Linear Technology

.. LT3750 Capacitor Charger Controller Features - - - - - - - DESCRIPTIO U APPLICATIO S - - - - - - 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 Emergency Warning Beacons Professional Photoflash Systems Security/Inventory Control Systems High Voltage Power Supply Electric Fences Detonators 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 78m V 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. The CHARGE pin gives full control of the LT3750 to the user. The DONE pin indicates when the capacitor has reached its programmed value and the part has stopped charging. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. - Protected by U.S. Patents, including 6518733, 6636021. TYPICAL APPLICATIO VTRANS 10µF 300V, 6A Capacitor Charger T1 1:10 56µF ×2 D1 VOUT 300V - - + 100µF 300 VTRANS = 18V 250 VTRANS = 6V 200 VOUT (V) 150 100 VCC 12V 10µF 100k VCC DONE VTRANS RVOUT RDCM LT3750 GATE SOURCE 60.4k 43k...