NS launches a high brightness LED driver with a wide range of integration and high input voltage

National Semiconductor Corporation Ns announced that the company's PowerWise series of high efficiency products and add two new LED drive. These two models are LM3401 and LM3405A LED driver can drive 1W to 5W high brightness LED, especially for industrial, automotive and general lighting systems, such as solid state lamps and advertising light boxes. The two chip input voltage range is very wide, can output constant current to control the brightness of LED. In addition, lower feedback voltage helps to reduce power consumption.

National Semiconductor's high efficiency LM3401LED driver for 4.5V to 35V input voltage, the output can be more than 3A drive current, and the current size can be adjusted flexibly, duty cycle up to 100%. In addition, the feedback voltage of the chip is only 0.2V, and the accuracy of the high accuracy of the influenza virus (no more than 3% of the error), so it can provide constant current for the LED, to ensure the stability of LED light color.

LM3405ALED driver for 3V to 22V input voltage, but also can be used loosely coupled 12V AC voltage supply voltage regulator for industrial and commercial lighting applications. Because the chip uses a small SOT-23 package, so the LED can be placed in a small bulb, and lighting efficiency is higher than the traditional quartz lamp and tungsten lamp, so it is a good choice to replace these two types of light.

Technical specifications for LM3401LED drives

LM3401

Chip is a high efficiency hysteresis PFET switch controller, can provide constant drive current for series LED, excellent performance can ensure the output light color stability. This chip is equipped with adjustable hysteresis window, in the selection of components and simplify system design has a strong flexibility. Another advantage of this chip is no need to add external compensation circuit. This chip can sense the current of the LED regulator, and then the LED current and 0.2V low feedback voltage compared with each other, without the need to add an output capacitor can also control the feedback constant current. The LM3401 chip is equipped with programmable overcurrent protection function, but also can control the light input by PWM input signal through the DIM input pin. Packaging, this chip uses 8 pin Mini SOIC package. For further information on the LM3401 chip or order samples and evaluation circuit board, you can browse the http://www.national.com/pf/LM/LM3401.html page.

Technical specifications for LM3405ALED drives

The latest launch of the national semiconductor LM3405A chip is suitable for up to 22V of the input voltage, the voltage range is higher than previously listed on the LM3405 chip. LM3405A chip is a small 6 pin SOT-23 package with constant current buck regulator, can output up to 1A of current, drive 3W or 5W LED. In addition, the LM3405A chip can provide the implementation of constant current 0.2V reference voltage feedback control is required, and can provide internal compensation, the switching frequency is fixed on the operation of 1.6MHz, it is a simple and efficient LED driver solution. LM3405A chip with EN/DIM pin, can support PWM dimming control function. LM3405A can use 12V AC and 12V DC drive general lighting systems, including industrial and commercial lighting applications.

National semiconductor power management products

Multifunctional portable electronic products and the use of alternating current of the larger equipment volume and energy also have to face the restriction of the problem, therefore, national semiconductor has been committed to providing a variety of design schemes for these applications, the design of the power management system to solve the problem. Whether it is the design of power supply system for the novice or power management experts can make full use of national semiconductor products, technical experience and design tools, such as power supply system, they can use the company's development, more complex, electronic products designed to meet environmental standards, and can in the shortest time the product launch market. National Semiconductor offers a variety of high performance chip products, including switching regulators, such as the company's flagship SIMPLE SWITCHER theory series, and special application products such as white LED driver and PoE controller. For further information on the national half power management products, visit the http://power.national.com/CHS website.

Prices and availability

LM3401 and LM3405A two chips are based on the purchase of 1000 units, single chip LM3401 price of $0.75, while the LM3405A chip single price of $1.30, the two chips have been bulk supply.

Source: EEPW