Maxim Introduces MAX16831 High-Voltage LED Driver

Topic: Maxim, a leading supplier of analog devices for technology analog devices, introduces the MAX16831 high-voltage, high-power, constant-current LED driver with built-in analog and PWM dimming. The LED driver integrates a floating LED current sense amplifier with a dimming MOSFET driver to minimize component count and meet the high reliability requirements of automotive and general lighting applications with high brightness (HB) LEDs.

The MAX16831 operates at high frequencies with a wide (1,000:1) dimming range, built-in analog and PWM control. The LED driver provides ±5% precision LED current control throughout the automotive operating temperature range, ensuring excellent brightness matching. This component has been specifically optimized to meet the latest automotive headlamp design requirements, ideal for high beam and low beam, adaptively adjusted headlight systems, daytime running lights and fog lights. Operating from a 5.4V to 76V input voltage range, it withstands harsh operating conditions, thus ensuring compatibility with cold and dry loads (up to 80V).

The chip's LED current sense reference as low as 100mV and an internal gate driver with 1.4A/1.2A source/sink current capability enable high efficiency, minimizing component heat generation. A dedicated enable/disconnect input reduces the current in the off mode to less than 45μA.

The MAX16831 features output overvoltage and overcurrent protection, as well as overtemperature and LED short-circuit protection. Components operate over the automotive temperature range of -40°C to +125°C and are available in lead-free, 5mm x 5mm, 32-pin TQFN packages.

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