Sunnyvale, Calif. Maxim Integrated Products introduced 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 in automotive and general lighting applications which use high-brightness (HB) LEDs. Designed to withstand harsh operating environments, the MAX16831 operates from a 5.4 V to 76 V input-voltage range, thus supplying a cold-start and load-dump (up to 80 V) compliance. Tailored to meet the requirements of the latest front-light automotive designs, it is suitable 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 1000:1 dimming range with analog or PWM control. The analog control signal is compared to an on-board 200 Hz ramp and can be used to simplify designs which require multilevel brightness adjustment. The LED driver provides ±5% accurate LED-current control over the entire automotive operating-temperature range. A low 100 mV LED current-sense reference and an internal gate driver with 1.4 A/2 A source/sink capability allow for high-efficiency and minimal heat dissipation. An enable/shutdown input ensures the shutdown-mode current remains below 45 µA.
The MAX16831 also features output overvoltage and overcurrent protection, as well as overtemperature and LED short-circuit protection. Fully specified for the -40°C to 125°C automotive temperature range, it is available in a lead-free, 5 x 5-mm, 32-pin TQFN package with exposed pad.
Availability: Production quantities available third quarter 2007
Pricing: Begins at $2.33 each in 1,000-piece quantities
Data Sheet: MAX16831 LED driver
Maxim Integrated Products, 408-737-7600, www.maxim-ic.com