Advertisement
Product Releases
Advertisement

LED Driver Addresses Medium LCD Display Backlighting

Fri, 04/02/2010 - 6:54am
driver for med LCD displaysAllegro MicroSystems, Inc. introduced a new high power LED driver with output disconnect for backlighting medium LCD displays. This driver targets in-dash navigation systems, automotive infotainment, and back-up camera displays. A commercial version is also available for industrial and consumer applications. Allegro’s A8501 integrates a boost converter and four 100 mA current sinks. LED channels can be tied together for up to 400 mA sink capability. It can work from a single power supply of 8 V to 21 V and withstand up to 40 V. The boost converter is a constant frequency, current-mode converter. The operating frequency can be set up to 2 MHz in order to avoid interference with the AM radio band in automotive applications. The integrated boost DMOS switch is rated for 40 V at 3.6 A. PWM dimming allows LED currents to be controlled at up to a 1000:1 ratio. Additional 4:1 dimming can be achieved by using the DIM pin. As part of an extensive list of protection features, the A8501 provides protection against output connector shorts through an integrated output disconnect switch. It also includes adjustable overvoltage protection (OVP) and protects against open or shorted LEDs and an open OVP resistor or boost diode.

Allegro MicroSystems, Inc.
508-853-5000, www.allegromicro.com
Advertisement

Share this Story

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading