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Solutions Search - Step-Down (Buck) LED Drivers

DC2286A - LT3932 Demo Board | VIN = 8V to 36V driving two series LEDs (1ALED/6.6VLED) at 2MHz

Oct 27th 2017
Demonstration circuit DC2286A is a 36V, 2A synchronous 2MHz buck LED driver featuring the LT3932. It drives one or two series LEDs at 1A when VIN is between 8V and 36V. It can run down to 4VIN with a single LED (if UVLO is adjusted). DC2286A runs at 2MHz switching frequency. Spread spectrum frequency modulation (SSFM) can be ...

Demo Board 

 

DC2424A - LT3964 Demo Board | VIN = 5V to 36V driving two separate LED strings (1ALED/~3.6VLED) at 2MHz

Aug 22nd 2017
The DC2424A is a 36V synchronous dual LED driver with I 2C featuring the LT®3964. It drives two separate LEDs (or channels of LEDs) at 1A when VIN is between 5V and 36V. DC2424A runs at 2MHz switching frequency. Its two channels can drive separate LED strings which can have different currents, voltages, or dimming ratios. ...

Demo Board 

 

DC1784B - LT3797EUKG Demo Board: 2.5V to 40V input to 1A output at up to 50V

Jul 24th 2017
DC1784B is a triple boost LED driver featuring the LT3797 triple boost LED controller. It accepts an input voltage from 2.5V to 40V (with higher transient) and drives three independent strings of up to 50V LEDs at 1A. DC1784B features independent PWM and analog dimming of each of the three LED strings. Each of the three channels ...

Demo Board 

 

36V, 2A Monolithic Synchronous Step-Down LED Driver with Silent Switcher Topology Minimizes EMI Concerns

Jul 11th 2017
MILPITAS, CA and NORWOOD, MA – July 11, 2017 – Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LT3932, a monolithic, synchronous, step-down DC/DC converter with internal 36V, 2A power switches and an internal PWM generator. Its fixed frequency, peak current mode control ...

Press Release 

 

High Efficiency Solar MPPT Battery Charger Using LT8611 and AD5245

Perry Faubert - FAE Jul 10th 2017
Introduction Outdoor applications that use solar panels in the range of a few watts often use a microcontroller-based MPPT (Maximum Power Point Tracking)  function to extract the maximum power available over the full range of environmental operating conditions. Many microcontroller-based MPPT solutions designed for ...

Blog Post LTspice 

 

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 ...

Video 

 

Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lighting

Keith Szolusha - Applications Engineering Section Leader Oct 12th 2016
Design Note DN557: Introduction The breadth of LED applications has grown to encompass everything from general lighting to automotive, industrial and test equipment, sign boards and safety instruments. Feature requirements for LED drivers have become more extensive. The latest LED solutions require drivers that are compact, ...

Blog Post 

 

3A, 1MHz Buck Mode LED Driver with Integrated Voltage Limiting

Matthew Grant - Sr Design Eng Oct 3rd 2016
Design Note DN556: Introduction The LT3952 monolithic LED driver includes a 4A, 60V DMOS power switch, excellent for driving high current LEDs in buck mode. Among its many features is an input current sense amplifier, which can be leveraged to provide built-in LED voltage limiting in buck mode.   In buck mode, the ...

Blog Post 

 

36V, 2A Monolithic Synchronous Step-Up Silent Switcher LED Driver

Sep 19th 2016
MILPITAS, CA – September 19, 2016 – The LT3922 is a monolithic, synchronous, step-up DC/DC converter with internal 40V, 2A power switches and an internal PWM generator. Its fixed frequency peak current mode control accurately regulates current within ±2% for a string of LEDs up to 34V. Its integrated PWM generator ...

Press Release 

 

LT3517 Buck Mode 1A LED Driver

Sep 13th 2016
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3517 350mA, 5V to 12V Boost Converter with Accurate Input Current Limit

Sep 13th 2016
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3517 Low Side current Sensing Load Dump Protected Buck-Boost Mode LED Driver

Sep 13th 2016
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3517 Boost 100mA LED Driver with LED Open Protection

Sep 13th 2016
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3517 5.5V SEPIC Convener with Short-Circuit Protection

Sep 13th 2016
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3476 5V to 25V Buck-Boost Mode Driver for 2 Series 350mA LEDs

Sep 12th 2016
The LT3476 is a quad output DC/DC converter designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between ...

Circuit 

 

LT3476 Buck Mode 100W Quad 1A × 8 LED Driver

Sep 12th 2016
The LT3476 is a quad output DC/DC converter designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 200kHz ...

Circuit 

 

LT3476 Quad Boost 200mA × 8LED Driver

Sep 12th 2016
The LT3476 is a quad output DC/DC converter designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 200kHz ...

Circuit 

 

LT3744 Boost Mode 3A LED Driver with 98% Efficiency

Sep 9th 2016
The LT®3744 is a fixed frequency synchronous step-down DC/DC controller designed to drive a LED load at up to 20A continuous or 40A pulsed. The peak current mode controller will maintain ±3% LED current regulation over a wide output voltage range, from VEE to VIN. By allowing VEE to float to negative voltages, several ...

Circuit 

 

LT3474 Step-Down 1A LED Driver with PWM Dimming

Sep 9th 2016
The LT3474/LT3474-1 are fixed frequency step-down DC/DC converters designed to operate as constant-current sources. An internal sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA ...

Circuit 

 

LT3474 Step-Down 1A LED Driver with Two Series Connected LED Output

Sep 9th 2016
The LT3474/LT3474-1 are fixed frequency step-down DC/DC converters designed to operate as constant-current sources. An internal sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA ...

Circuit 

 

LT3474 Step-Down 1A LED Driver with Four Series Connected LED Output

Sep 9th 2016
The LT3474/LT3474-1 are fixed frequency step-down DC/DC converters designed to operate as constant-current sources. An internal sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA ...

Circuit 

 

LT8611 12V Step-Down with 1A Output Current Limit

Sep 9th 2016
The LT®8611 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor ...

Circuit 

 

LT8611 1V Step-Down with 2A Output Current Limit

Sep 9th 2016
The LT®8611 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor ...

Circuit 

 

LT8611 Coincident Tracking Step-Downs Each with 2A Output Current Limit

Sep 9th 2016
The LT®8611 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor ...

Circuit 

 

LT8611 2A LED Driver

Sep 9th 2016
The LT®8611 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor ...

Circuit 

 

LT3478 15W, 6 LEDs at 700mA, Boost LED Driver

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3478 17W, 15 LEDs at 350mA, Boost LED Driver plus LT3003

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3478 16W, 12 LEDs at 350mA, Buck-Boost Mode LED Driver plus LT3003

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3478 4W, 1 LED at 1A, Buck-Boost Mode LED Driver

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3478 24W, 4 LEDs at 1.5A, Buck Mode LED Driver

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3478 6W, 6 LEDs at 250mA, Boost LED Driver

Sep 9th 2016
The LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor ...

Circuit 

 

LT3795 Short-Circuit Robust Boost LED Driver with Input Current Limit and Spread Spectrum Frequency Modulation

Sep 8th 2016
The LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply ...

Circuit 

 

LT3795 SEPIC LED Driver with Input Current Limit

Sep 8th 2016
The LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply ...

Circuit 

 

LT3795 Buck Mode LED Driver

Sep 8th 2016
The LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply ...

Circuit 

 

LT3795 Buck Mode LED Driver with 3000:1 PWM Dimming

Sep 8th 2016
The LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply ...

Circuit 

 

LT3518 Buck Mode 1.5A LED Driver

Sep 8th 2016
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3518 Buck-Boost Mode LED Driver

Sep 8th 2016
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3518 Buck Mode 1A LED Driver with Open LED Protection and Sync Input

Sep 8th 2016
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3518 Boost 300mA LED Driver with LED Open Protection

Sep 8th 2016
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. ...

Circuit 

 

LT3755 20W SEPIC LED Driver

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3755 Buck Mode 1.4A LED Driver

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3755 Buck Mode 500mA LED Driver for 20kHz PWM Dimming

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3755 21W Buck-Boost Mode with 250:1 PWM Dimming and Open LED Protection

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3755 Buck-Boost LED Driver for Automotive

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3756 30W White LED Headlamp Driver with Thermal Derating

Sep 6th 2016
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3756 Buck-Boost Mode LED Driver

Sep 6th 2016
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3756 90% Efficient, 20W SEPIC LED Driver

Sep 6th 2016
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3756 Buck Mode 1A LED Driver with High Dimming Ratio and Open LED Reporting

Sep 6th 2016
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3741 20A LED Driver

Sep 6th 2016
The LT®3741 and LT3741-1 are fixed frequency synchronous step-down DC/DC controllers designed to accurately regulate the output current at up to 20A. The average currentmode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). The regulated current is set by an ...

Circuit 

 

LTM8040 Step Down 1A Drive with Single Red or White LED

Sep 2nd 2016
The LTM8040 is a fixed frequency 1A step-down DC/DC μModule (power module) regulator designed to operate as a constant current source. Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs. High output current accuracy is maintained over a wide ...

Circuit 

 

LTM8040 Step Down 350mA Drive with Three Series Red LEDs

Sep 2nd 2016
The LTM8040 is a fixed frequency 1A step-down DC/DC μModule (power module) regulator designed to operate as a constant current source. Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs. High output current accuracy is maintained over a wide ...

Circuit 

 

LTM8040 Step Down 1A Drive with Four Series Red LEDs

Sep 2nd 2016
The LTM8040 is a fixed frequency 1A step-down DC/DC μModule (power module) regulator designed to operate as a constant current source. Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs. High output current accuracy is maintained over a wide ...

Circuit 

 

LTM8042 Boost Operation, Driving 6 White LEDs at 1A

Sep 2nd 2016
The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog ...

Circuit 

 

LTM8042 Boost Operation, Driving 9 White LEDs at 100mA

Sep 2nd 2016
The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog ...

Circuit 

 

LTM8042 Buck-Boost Mode, Driving 5 White LEDs at 500mA with PWM Dimming

Sep 2nd 2016
The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog ...

Circuit 

 

LTM8042 Buck Mode, Driving 4 White LEDs at 1A

Sep 2nd 2016
The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog ...

Circuit 

 

LTM8042 Boost Operation, Driving 9 Red LEDs at 350mA with Analog Dimming

Sep 2nd 2016
The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog ...

Circuit 

 

LT3965 Matrix LED Dimmer Powered by a Dual Buck Mode LED Driver with a Boost Pre-Regulator

Sep 2nd 2016
The LT®3965 is an LED bypass switching device for dimming individual LEDs in a string using a common current source. It features eight individually controlled floating source 17V/330mΩ NMOS switches. The eight switches can be connected in parallel and/or in series to bypass current around one or more LEDs in a string. ...

Circuit 

 

LT3965 Matrix LED Dimmer Powered by a Boost-Buck LED Driver

Sep 2nd 2016
The LT®3965 is an LED bypass switching device for dimming individual LEDs in a string using a common current source. It features eight individually controlled floating source 17V/330mΩ NMOS switches. The eight switches can be connected in parallel and/or in series to bypass current around one or more LEDs in a string. ...

Circuit 

 

LT3763 20A, Pulse Width Modulated, Single LED Driver

Sep 2nd 2016
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an ...

Circuit 

 

LT3763 1A, Five LED Driver

Sep 2nd 2016
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an ...

Circuit 

 

LT3763 350W White LED Driver

Sep 2nd 2016
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an ...

Circuit 

 

LT8613 5A LED Driver

Sep 2nd 2016
The LT®8613 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 3μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor ...

Circuit 

 

LT3922 Low EMI 400kHz, 96°/o Eificient 10W (30V, 333mA) Boost LED Driver with SSFM

Aug 31st 2016
The LT3922 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. The LT3922 will maintain ±2% current regulation through an ...

Circuit 

 

LT3922 500mA Boost LED Driver Using Pulse Duty Cycle CTRL Input

Aug 31st 2016
The LT3922 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. The LT3922 will maintain ±2% current regulation through an ...

Circuit 

 

LT3922 2MHZ, 95% Efficient 15W (15V, 1A) Buck Mode LED Driver

Aug 31st 2016
The LT3922 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. The LT3922 will maintain ±2% current regulation through an ...

Circuit 

 

LT3922 500mA, 5V to 12V Boost Convener with Accurate Input Current Limit

Aug 31st 2016
The LT3922 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. The LT3922 will maintain ±2% current regulation through an ...

Circuit 

 

LT3922 Low EMI 2MHZ, 333mA Boost LED Driver with SSFM

Aug 31st 2016
The LT3922 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. The LT3922 will maintain ±2% current regulation through an ...

Circuit 

 

DC780B - LT1618 Demo Board | CC/CV Boost, 3.3V ≤ VIN ≤ 4.2V, Vout = 12V@250mA(CV) or 3.5V@500mA(CC)

Jul 25th 2016
Demonstration circuit 780B is a Constant-Current Constant- Voltage 1.4MHz Step-up DC/DC Converter featuring the LT ® 1618. DC780B demonstrates a general purpose Boost converter with a 12V, 250mA output from a 3.3V-4.2V source. The demo board can also be used as an LED driver, where a Luxeon LED (not installed), is driven ...

Demo Board 

 

95% Efficient at 2MHz 42V Sync Buck

Jun 24th 2016
Linear Technology’s family of high voltage synchronous step-down DC/DC switching regulators offer up to 95% efficiency. Switching at 2MHz, these low EMI parts utilize the Silent Switcher technology. Other features include spread spectrum frequency modulation, ultra-low quiescent current and are available with single, dual, ...

Blog Post 

 

DC2218A - LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, Up to 30VLED @ 500mA (8 LEDs/String)

Dec 16th 2015
Demonstration circuit DC2218A is a matrix LED dimmer system featuring the LT3965 8-switch matrix LED dimmer IC. There are 16 500mA LEDs that can be individually turned on, off, or PWM dimmed with two 8-switch LED dimmer LT3965 ICs. The two strings of LEDs are driven with two buck LED driver outputs of the LT3797 triple LED controller ...

Demo Board 

 

42V High Power Density Buck Regulators in a Tiny QFN Package

Ying Cheng - Sr Apps Eng Dec 7th 2015
Design Note 1038: Introduction Power dissipation is a significant problem facing the designers of DC/DC converters in industrial and automotive applications, where high currents are required, but space is limited. It is possible to produce a highly efficient regulator from high performance discrete components, but expense and ...

Blog Post 

 

DC1930A - LT3744 Demo Board | Inverting Buck-Boost LED Driver, 3.3V ≤ VIN ≤ 30V, Drives 3 LEDs @ up to 12A

Dec 4th 2015
Demonstration circuit 1930A is a high current synchronous inverting buck-boost LED driver featuring the LT®3744. The unique drive stage used on the LT3744 allows the anodes of three LEDs to be connected together for better heat sinking in both the inverting buck-boost configuration (LED anodes at ground) and the step-down ...

Demo Board 

 

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 ...

Video 

 

Spread Spectrum Frequency Modulation Reduces EMI

Kevin B. Scott - Senior Strategic Marketing Engineer
Greg Zimmer - Senior Product Marketing Engineer
Nov 4th 2015
Electromagnetic Radiation (EMR), Electromagnetic Interference (EMI) and Electromagnetic Compliance (EMC) are terms that pertain to energy from electrically charged particles and the associated magnetic fields that can potentially interfere with circuit performance and signal transmissions. With the proliferation of wireless ...

Blog Post 

 

LT3952 Short-Circuit Robust Boost LED Driver with Spread Spectrum Frequency Modulation

Sep 8th 2015
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage ...

Circuit 

 

LT3952 SEPIC LED Driver with Input Current Limit

Sep 8th 2015
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage ...

Circuit 

 

LT3952 2MHz Boost LED Driver with 4000:1 PWM Dimming and Overvoltage Protection

Sep 8th 2015
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage ...

Circuit 

 

LT3952 3MHz Buck-Boost LED Driver with Internal PWM Dimming and Fade Start

Sep 8th 2015
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage ...

Circuit 

 

LT3952 3A Buck Mode LED Driver

Sep 8th 2015
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage ...

Circuit 

 

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