The MCP1252-ADJ is an excellent choice for biasing the back lighting or driving other LED applications. Light intensity is controlled uniformly through the use of ballast resistors. Dimming is accomplished by pulse-width modulating the shutdown pin of the device.
Demonstration circuit DC2342A is a 60V synchronous boost LED controller featuring the LT3762. It drives a single string of LEDs at 2A up to 32V when VIN is between 7V and 28V. It runs down to 4VIN with reduced ILED and can withstand VIN transients as high as 30V.
The LM3492 integrates a boost converter and a two-channel current regulator to implement a highly efficient and cost effective LED driver for driving two individually dimmable LED strings with a maximum power of 15 W and an output voltage of up to 65 V. The boost converter employs a proprietary projected-on-time control method to give a fast transient response with no compensation required, and a…
The MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board is used to evaluate and demonstrate Microchip Technology’s MCP1643 device. This board demonstrates the MCP1643 in a boost converter application supplied by one AA battery, or from an external voltage source, which drives an LED with four selectable currents. The MCP1643 Synchronous Boost LED Constant Current Regulator E…
This document is an engineering report describing two constant current and constant voltage (CC/CV) power supplies utilizing DPA423G (at 20 W) and DPA424G (at 30 W).
This Application Note introduces Infineon’s Hysteritic Buck DC/DC LED driver ILD6150 for general lighting application. It describes the demo board, performance as well as design ideas for various applications. The ILD6150 offers high efficiency, various protection features, superior dimming performance & reliability for high performance lighting system.
Demonstration circuit 1315 features the LT®3475-1 dual step-down 1.5A LED driver in a 16-lead TSSOP thermally enhanced package. The demonstration circuit is designed to drive two 1.5A LED strings (one on each channel) from a high input voltage. The high switching frequency scheme permits the use of a small inductor and ceramic capacitors to save space and cost. The current mode PWM control scheme…
Demonstration circuit 1166 is a 48V Buck-Mode LED Driver featuring the LT3590. The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series from a 48V DC source. Series connection of the LEDs provides identical LED currents of up to 50mA, resulting in uniform brightness and eliminating the need for ballast resistors. A fixed frequency current mode arc…
Demonstration circuit 1039 is a 600mA Universal Multi-Output LED/CAM Driver with six white LEDs, two RGB LEDs, and a camera flash featuring the LTC3207/LTC3207-1. The LTC3207/LTC3207-1 is a low noise charge pump designed to drive 12 universal LED (ULED) current sources and one high current camera flash.