Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX16831
Edited by the Electronicstalk Editorial
Team on 25 May 2007
High-power LED driver targets automotive
uses
High-voltage high-power constant-current LED driver offers both analogue and PWM dimming.
Available now from Maxim Integrated Products, the MAX16831 is a high-voltage high-power constant-current LED driver with analogue and PWM dimming This LED driver integrates a floating LED current-sense amplifier and dimming MOSFET driver to minimise component count and ensure high reliability in automotive and general lighting applications that use high-brightness (HB) LEDs
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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Designed to withstand harsh operating environments, the MAX16831 operates from a 5.4 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 analogue or PWM control.
The analogue control signal is compared with an onboard 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 45uA.
The MAX16831 also features output overvoltage and overcurrent protection, as well as overtemperature and LED short-circuit protection.
Fully specified for the -40 to +125C automotive temperature range, it is available in a lead-free, 5 x 5mm, 32-pin TQFN package with exposed pad.
Prices start at US $2.33 (1000-up, FOB USA).
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