Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3750
Edited by the Electronicstalk Editorial Team on 10 May 2006
Flyback controller charges quickly
The LT3750 flyback controller can charge a 100uF capacitor to 300V in less than 300ms making it ideal for applications such as professional photoflash systems.
Linear Technology has announced the LT3750, a flyback controller designed to rapidly charge large capacitors to voltages as high as 1000V The LT3750 drives an external high current N-channel MOSFET and can charge a 100uF capacitor to 300V in less than 300ms making it ideal for applications such as professional photoflash systems, RF security, inventory control systems and specialised high voltage power supplies
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Its input voltage range of 3 to 24V enables it to operate from a variety of power sources and its patented boundary mode control scheme minimises transition losses and reduces transformer size.
Packaged in a tiny MSOP-10, it provides a very compact high voltage/current capacitor charger solution.
The LT3750's primary-side sensing topology eliminates the need for an external output voltage divider.
It uses a single high current N-channel MOSFET and delivers charging efficiencies above 90%.
A low 78mV current sense accurately limits peak switch current while optimising efficiency.
Output voltages can be easily adjusted using the transformer turns ratio and two external resistors.
Additional features include a charge pin, offering full control of the LT3750 to the user and a "done" pin that indicates when the capacitor has reached its programmed value and has stopped charging.
The LT3750EMS is available from stock in a 10-lead MSOP-10 package.
1000-piece pricing starts at $3.50 each. Request a free brochure from Linear Technology Corp ...
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