ADI LT1932ES6#TRMPBF

Регулятор постоянного тока DC1V10V40 мА

Overview

The LT1932ES6 is a fixed frequency step-up DC/DC converter designed to operate as a constant-current source. Because it directly regulates output current, the LT1932ES6 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the voltage across their terminals.

With an input voltage range of 1V to 10V, the device works from a variety of input sources. The LT1932ES6 accurately regulates LED current even when the input voltage is higher than the LED voltage, greatly simplifying battery-powered designs. A single external resistor sets LED current between 5mA and 40mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal. When the LT1932ES6 is placed in shutdown, the LEDs are disconnected from the output, ensuring a quiescent current of under 1µA for the entire circuit. The device’s 1.2MHz switching frequency permits the use of tiny, low profile chip inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

Features

Applications

• Portable lighting
• Gallery lighting
• Museum lighting
• High-end retail lighting
• Medical surgery lighting
• Replacement lamps
• Panel lighting
• Down lights
• Linear fluorescent
• A- lamps