REFERENCE GUIDE: Nuventix LED Bulb Design
Ideal for LED applications running off 12V or 24V rails, this 4-layer board has input voltage and ground as the 2 internal planes. LM3429 LED driver converts 9 to 36 VDC input to a 700 mA constant current output designed to operate a load of 3 to 4 series LEDs.Works with Nuventix SynJet module to cool the LED luminaire/bulb replacement for MR16 or PAR20/25/30/38 form factors. + view resource.
WEBCAST: Light Sensors and their Role in LED Lighting
Intelligent lighting control systems for LED-based illumination rely on an ambient light sensor, power control circuitry, and a microcontroller. Hear our expert panel discuss selecting the right light sensor for the app, designing the control circuitry, choosing the appropriate microcontroller, and more. + view resource.
WHITEPAPER: Thermal Management for Solid-State Lighting
A common challenge solid-state lighting designers have to address is controlling the thermal environment. National's thermal management solutions address this issue with a portfolio of temperature sensors that complement National’s high-brightness LED drivers. + view resource.
SOLUTIONS GUIDE: LED Drivers for High-Brightness Lighting
Explore National’s PowerWise® energy-efficient LED drivers, reference designs and subsystems for automotive, indoor/outdoor, and other general illumination applications. Learn about the “ABCs of LEDs” and how National’s WEBENCH® LED Designer online tool enables quick and easy selection and simulation of a complete LED solution. + view resource.
WEB APP: WEBENCH LED Designer
Use National Semiconductor’s WEBENCH LED Designer online tool to build the optimal LED for your specifications in four easy steps. Choose an LED and enter your requirements for a list of LEDs. Design the power supply with a PowerWise® LED driver. Complete and verify the design. Then order a customized prototype kit. + view resource.
WHITEPAPER: Energy-Efficient Handheld Illumination
Portable battery sources are constantly challenged by the handheld applications’ increasing functionality and power demands. By better understanding the applications’ energy consumption, designers can produce energy-efficient solutions that will conserve battery life and provide a better end-user experience. + view resource.
WHITEPAPER: COT Drivers Control LED Ripple Current
The constant on-time (COT) control method used by constant-current buck regulators provides a balance between control over switching frequency and fast transient response. Normally this “quasi-hysteretic” control senses the input voltage and adjusts the on-time tON of the power MOSFET as needed to keep fSW constant. + view resource.
SOLUTIONS GUIDE: Automotive LEDs
National’s LED drivers offer dimming, protection, and thermal control suitable for a wide range of automotive lighting applications. These LED drivers provide a wide-input voltage range, constant current to regulate LED brightness, low-feedback voltage to minimize power dissipation, and zero shutdown current to maximize efficiency. + view resource.
WHITEPAPER: Dimming Techniques for LED Drivers
Exponential growth of LED lighting has ushered in a vast selection of integrated circuit devices to provide controlled power to LEDs. Switched-mode LED drivers have replaced linear current sources as the standard. This article describes basic LED theory and techniques used to provide dimming control to switched-mode LED drivers. + view resource.
REFERENCE GUIDE: LED Design Library
Inductive LED driver reference designs are available for powering a wide variety of white LED types of multiple colors and configurations with high power efficiency. Many designs offer high output current, for multiple LEDs in series, LED flash, or high-power LEDs. + view resource.
