LED Driver First With Headroom Control

Introduced as the industry’s first LED driver with dynamic headroom control and multiple outputs for high-power applications, the LM3464 promises to maximize system efficiency and reduce system cost in LED-intensive applications. The device includes four channels to drive up to 20 LEDs per channel. Its headroom control feature dynamically adjusts the LED supply voltage through the power supply feedback to the lowest level required for optimal efficiency. Other features include a wide input voltage range up to 80V, a thermal foldback feature that protects the LEDs from unsafe temperatures, PWM and analog dimming interfaces, plus VIN under-voltage lock-out, LED open/short circuit, and over-temperature protection. Available in a 28-pin TSSOP, price is $4.50 each/1,000. NATIONAL SEMICONDUCTOR CORP., Santa Clara, CA. (800) 272-9959.