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Solutions Search - Step-Down (Buck) LED Drivers

Low EMI LED Driver with Synchronous Internal 2A Switches

Keith Szolusha - Applications Engineering Section Leader Nov 17th 2016
The LT3922 40V, synchronous, Silent Switcher low EMI LED driver meets the demands of the next generation of LED systems. These LED drivers require more features and higher performance than ever before. Higher efficiency prolongs battery life and reduces heat in space-constrained applications. Wide voltage ranges are needed ...

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60V 8-Switch Matrix LED Dimmer

Keith Szolusha - Applications Engineering Section Leader Nov 10th 2015
LEDs are being used in current luxury model automotive headlights. Future automotive headlight designs include more powerful LEDs, more LEDs, and highly animated and multifunctional LED strings. These “matrix” LED headlights have the ability to change brightness and patterns. They allow control of individual LEDs ...

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60V LED Driver with Internal 4A Switch for Automotive Lighting

Keith Szolusha - Applications Engineering Section Leader Mar 31st 2015
LED lighting is an important feature in today’s and future automobile designs. LED lighting is efficient, robust, attractive, and artistic. LED lighting is used in many different ways in a vehicle, namely high and low beam headlights, daytime running lights, signal lighting, brake lights, dashboard displays, heads up displays, ...

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High Power Three-Channel LED Driver

Keith Szolusha - Applications Engineering Section Leader Oct 27th 2014
Large arrays of LEDs require high power and multi-string LED drivers. When many single channel, high power converters are used in an application, a better solution may be to reduce the cost and number of components by using a single converter with several drivers on the same IC. Eliminating or reducing duplication of features ...

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Spread Spectrum Frequency Modulation Reduces Automotive LED Driver EMI

Keith Szolusha - Applications Engineering Section Leader Dec 30th 2013
The large number of electronics in an automobile must have reasonably low electromagnetic interference (EMI) in order to avoid disturbing the radio reception, GPS navigation tools and other forms of communication and broadcast. Switch mode regulators are commonly used in this environment and they have to be designed to mitigate ...

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LT3743 High Current Synchronous Buck LED Driver with Three-State Control - Video Product Brief

Jeff Gruetter - Product Marketing Engineer Mar 4th 2011
The LT3743 is a fixed frequency synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). LED dimming is achieved through analog dimming on the CTRL_L, CTRL_H and CTRL_T pins ...

Video LTspice 

 

LT3956 80V VIN, 80V VOUT Constant-Current/Constant Voltage Multi-Topology LED Controller - Video Product Brief

Jeff Gruetter - Product Marketing Engineer Feb 22nd 2011
The LT3956 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It is ideally suited for driving high current LEDs. It features an internal low side N-channel power MOSFET rated for 84V at 3.3A and driven from an internal regulated 7.15V supply. The fixed frequency, current-mode ...

Video LTspice 

 

LT3592 36V 0.5A Constant-Current Buck LED Driver - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer Dec 13th 2010
The LT3592 is a fixed frequency step-down DC/DC converter designed to operate as a constant-current source. An external sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. The output current can be dimmed by a factor of 10 using an external signal for nighttime ...

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High Current LED Driver with Three-State Control

Walker Bai - Applications Enginneer Nov 15th 2009
There are many LED drivers on the market for low current LEDs and many others for high current LEDs. Low current LEDs are 20mA to 100mA LEDs. High current ones are 100mA to ~1A. But how many 20A LED drivers do you know? How about 40A? Not many. How about super fast µs rise time between 0A and 20A or between any two current ...

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