High-Voltage HB LED Driver targets automotive applications.
July 29, 2010 -
Model MAX16833 for boost, buck-boost, and buck configurations can sustain battery load-dump peaks up to 65 V. It provides single-wire connection to LEDs and includes high-side dimming p-channel MOSFET driver and current-sense amplifier that detect short-circuits, with protection between output and ground, and input and output. Frequency dithering is included on MAX16833, while MAX16833B has ±2%-accurate 1.64 V reference voltage output. Both operate over -40 to +125°C temperature range.
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Original Press release
Maxim Integrated Products
120 San Gabriel Dr.
Sunnyvale, CA, 94086
USA
High-Voltage HB LED Driver Enables More Reliable, Fault-Tolerant Automotive LED Driver Applications with Lower EMI Noise
High-voltage, switching HB LED driver reduces EMI and fault events.
Maxim's new HB LED driver offers unique fault detection and protection features, single-wire connection to LEDs, and improved EMI.
SUNNYVALE, CA - Maxim Integrated Products (NASDAQ: MXIM) announces the MAX16833, a high-voltage HB LED driver for boost, buck-boost, and buck configurations. The device's unique architecture offers comprehensive short-circuit protection, single-wire connection to LEDs, and internal frequency dithering. These features make it easier for designers to meet the demanding reliability requirements of high-power automotive lighting applications such as DRLs (daytime running lights), position lights, turn signals, and high-/low-beam assemblies.
The MAX16833 allows the design of more fault-tolerant, reliable LED driver applications. Thanks to its wide input-voltage range, it can sustain battery load-dump peaks up to 65V during normal operation. The integrated high-side dimming p-channel MOSFET driver and high-side current-sense amplifier detect short-circuit events and protect the LEDs, the driver, and the battery if those events occur. This short-circuit protection is provided between the output and ground, and also between the input and output. Additionally, this architecture allows a single-wire connection to the LEDs, thus reducing LED-to-driver wiring cost and complexity. The MAX16833 also includes output overvoltage and overtemperature protections, as well as a fault-detection output.
Another feature is its internal frequency dithering, which improves EMI considerably, thus easing the board designer's task and reducing EMI filter component costs substantially. The MAX16833B version of this HB LED driver does not include this frequency dithering, but instead features a ±2%-accurate 1.64V reference voltage output that can be used by other devices on the driver board.
Both versions are available in a thermally enhanced, 16-pin TSSOP package and are fully specified to operate over the -40°C to +125°C automotive temperature range. Prices start at $1.53 (1000-up, FOB USA).
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6300 products serving the industrial, communications, consumer, and computing markets.
Maxim reported revenue in excess of $1.6 billion for fiscal 2009. A Fortune 1000 company, Maxim is included in the Nasdaq 100, the Russell 1000, and the MSCI USA indices. For more information, go to www.maxim-ic.com.
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