Highly Integrated, High-Voltage LED Driver Ensures High Reliability in Automotive and General Lighting

Content Dam Leds En Ugc 2007 05 Highly Integrated High Voltage Led Driver Ensures High Reliability In Automotive And General Lightin Leftcolumn Article Thumbnailimage File
15142 0 thumb Date Announced: 23 May 2007

SUNNYVALE, CA -- Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX16831 high-voltage, high-power, constant-current LED driver with analog and PWM dimming.

This LED driver integrates a floating LED current-sense amplifier and dimming MOSFET driver to minimize component count and ensure high reliability in automotive and general lighting applications that utilize high-brightness (HB) LEDs. Designed to withstand harsh operating environments, the MAX16831 operates from a 5.4V to 76V input-voltage range, thus ensuring cold-start and load-dump (up to 80V) compliance. Specifically tailored to meet the requirements of the latest front-light automotive designs, it is ideal for high- and low-beam assemblies, adaptive front-light systems, daytime-running lights (DRLs), and fog lamps.

The MAX16831 features high-efficiency operation and a wide (1000:1) dimming range with analog or PWM control. The analog control signal is compared to an on-board 200Hz ramp and can be used to simplify designs that require multilevel brightness adjustment. Providing ±5% accurate LED-current control over the entire automotive operating-temperature range, this LED driver ensures excellent brightness matching. A very low 100mV LED current-sense reference and an internal gate driver with 1.4A/2A source/sink capability allow for high efficiency and, therefore, minimal heat dissipation. A dedicated enable/shutdown input ensures that the shutdown-mode current remains below 45 microamps.

The MAX16831 also features output overvoltage and overcurrent protection, as well as overtemperature and LED short-circuit protection. Fully specified for the -40 degrees Celsius to +125 degrees Celsius automotive temperature range, it is available in a lead-free, 5mm x 5mm, 32-pin TQFN package with exposed pad. Prices start at $2.33 (1000-up, FOB USA).

DATA SHEET: A Data Sheet for this product is available on the web.

Customer Service 1-800-998-8800


Web Site:www.maxim-ic.com/ledmag

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