LT3750: Capacitor Charger Controller Data Sheet11/12/2007223K
Features and Benefits
- 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
The LT3750 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.
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.
- Emergency Warning Beacons
- Professional Photoflash Systems
- Security/Inventory Control Systems
- High Voltage Power Supply
- Electric Fences
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
DC891A: Demo Board for the LT3750 Capacitor Charger Controller.
Documentation & Resources
R365 Reliability Data3/23/201819 K
DC891A - Demo Manual9/24/2009948K
Tiny Controller Makes It Easy to Charge Large Capacitors3/1/2006 LT Journal
Tools & Simulations
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|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT3750EMS#PBF||Material Declaration||Reliability Data||10-Lead MSOP|
|LT3750EMS#TRPBF||Material Declaration||Reliability Data||10-Lead MSOP|
|Wafer Fabrication Data||R365 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.