LT3750A

RECOMMENDED FOR NEW DESIGNS

Capacitor Charger Controller

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.12

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Overview

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 V_CC – 2V
Available in 10-Lead MS Package

The LT3750A is a flyback converter designed to rapidly charge large capacitors to a user-adjustable target volt-age. 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 LT3750A 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 LT3750A to the user. The DONE pin indicates when the capacitor has reached its programmed value and the part has stopped charging.

APPLICATIONS

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

All registered trademarks and trademarks are the property of their respective owners.
*Protected by U.S. patents, including 6518733, 6636021.

Part Models: 2
1ku List Price: Starting From $4.12

Documentation

Data Sheet 1

LT3750A: Capacitor Charger Controller Data Sheet (Rev.0) 06/17/2021

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT3750AEMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3750AEMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3750AEMS#PBF	PRODUCTION
LT3750AEMS#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT3750

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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