Single String White LED Driver has fault-tolerant design.February 15, 2012 -
Supplied in eMSOP-10 or eTSSOP-16 package with integrated current-mode boost converter, internal power switch, and current sink, single-output A8513 backlights LCDs in automotive/consumer designs. Driver can operate from single 4.5-40 V power supply to accommodate start/stop, cold crank, and load dump requirements, and 2 MHz boost converter switching frequency enables operation above AM radio band. Fault flag can be used as part of circuit to drive external P-FET to disconnect input supply.
Original Press release
Allegro MicroSystems Inc.
115 N.E. Cutoff, P.O. Box 15036
Worcester, MA, 01615
USA
Allegro MicroSystems, Inc. Introduces New Wide Input Voltage Range High-Efficiency Fault Tolerant Single String LED Driver
Designed for Automotive and Consumer Backlighting LCD Displays
Worcester, MA - Allegro MicroSystems, Inc. introduces a new single-output white LED (WLED) driver designed for backlighting LCD displays for both automotive and consumer designs and the associated application, performance and protection requirements. Allegro's A8513 integrates a current-mode boost converter with an internal power switch and one current sink. It is a robust solution for applications such as automotive infotainment, cluster, and center-stack, industrial LCD displays, portable DVD players, flatbed scanners, and LED lighting.
The A8513 can operate from a single power supply from 4.5 to 40 V, to accommodate start/stop, cold crank, and load dump requirements. A 2 MHz boost converter switching frequency allows the A8513 to operate above the AM radio band. If required, the fault flag can be used as part of a circuit to drive an external P-FET to disconnect the input supply from the system in the event of a fault. The device provides protection against output short and overvoltage, open or shorted diode, open or shorted LED pin, shorted boost switch or inductor, shorted ISET resistor, and IC overtemperature. A dual level cycle-by cycle current limit function provides soft start and protects the internal current switch against high current overloads.
Allegro's A8513 is supplied in both eMSOP-10 and eTSSOP-16 packages. These devices will be offered in various oscillator frequencies - please contact Allegro for further details. Pricing in quantities of 1,000 is shown below:
- A8513KYLTR-T: $1.18
- A8513KLPTR-T: $1.25
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.
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