Demonstration circuit 2339A is a high current synchronous step-down LED driver featuring the LT3744. The unique drive stage used on the LT3744 allows the anodes of three LEDs to be connected together for better heat sinking. This demonstration circuit 2339A is for customers to test the step-down configuration only.

This engineering report describes the design for a universal input, 22 V to 48 V, 180 mA LED driver. This power supply utilizes the LYT2004E device from the Power Integrations LYTSwitch-2 family.

The STEVAL-ILL066V1 evaluation board is a complete and configurable solution that efficiently controls a single dimmable high brightness LED string using the STLUX385A digital controller. The LED efficiency is high during all stages of dimming and the STEVAL-ILL066V1 can achieve a 92% efficiency during full load while maintaining a low, less than 200 mW power consumption during idle periods.

The AL5811 is an adjustable Linear LED driver offering excellent temperature stability and output handling capability. The AL5811 simplifies the design of linear and isolated or non-isolated LED drivers by setting the LED current with standard value resistors.

DC1573A is an 8-Channel 100mA High Voltage LED Driver featuring the LT®3760. The LT3760 drives up to 100mA per string and has a maximum LED string voltage of 45V. DC1573A is set at 1MHz switching frequency for smallest inductor and capacitor size as well as maximum PWM dimming performance. Overvoltage protection is set at 55V in case the LEDs are removed from the circuit. If the LEDs are opened, …

Demonstration circuit 2079A is a 40VIN, 40VOUT LED driver. It generates its own PWMOUT waveform from its internal PWM generator for accurate PWM dimming with up to 33:1 brightness ratio. It accepts an input voltage from 5V to 30V and drives up to 32V of LEDs at 650mA (when PVIN is less than VLED). DC2079A features both PWM and analog dimming of the LED string. It has an OPENLED flag that indicate…

Demonstration circuit 1319B-A/1319B-B is a high voltage and high current LED driver controller. The VIN pin input voltage is as high as 100V, and the LED output voltage is also as high as 100V. The demonstration circuit is assembled as a boost topology from 8V to 80V input and up to 80V LED output at 0.5A with an open-LED status pin (DC1319B-A) or a sync input pin (DC1319B-B). DC1319B features PW…

Demonstration circuit 507 features the LT1937 constant current white LED driver in a small SC70 package. The demo board consists of two circuits: an efficiency circuit designed to demonstrate high efficiency performance of the LT1937 using the Murata inductor and a size circuit highlighting the LT1937’s ability to work with a small ceramic chip inductor and a small output capacitor (0.22μF). The …

Demonstration circuit 871 is a low noise high current LED charge pump featuring the LTC®3215 and a cell phone camera flash LED. The board has three versions (-A, -B, -C) that are optimized separately for a short LED flash current or a lower but constant LED torch current with a single lithium ion battery input voltage range of 2.9V to 4.4V or three AAA batteries in series. The lithium ion battery…

Demonstration circuit 905 is a LED Driver in SC70 with built-in Schottky featuring the LT3491. The LT3491 is a fixed frequency step-up current mode DC/DC converter.