Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX16824 and MAX16825
Edited by the Electronicstalk Editorial
Team on 13 December 2007
LED driver dims three strings
Devices feature three 36V-rated open-drain constant-current sink outputs capable of delivering up to 150mA to three separate strings of HB LEDs.
Available now from Maxim, the MAX16824 and MAX16825 are three-channel high-brightness LED (HB LED) drivers each with a 6.5 to 28V input-voltage range These devices feature three 36V-rated open-drain constant-current sink outputs capable of delivering up to 150mA to three separate strings of HB LEDs
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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For optimal design flexibility, these ICs allow independent LED current setting of each channel.
To implement this functionality, the MAX16824 provides three PWM dimming inputs to independently control the brightness of each string of LEDs and switch each string on or off.
Conversely, the MAX16825 features a 3bit transparent latch, a 3bit shift register, and a 2Mbit/s four-wire serial interface.
The serial interface allows all output channels to be controlled through an external microcontroller; it also enables multiple MAX16825 drivers to be cascaded and operated together.
These flexible LED drivers are ideal for a wide range of applications including industrial, architectural, and decorative lighting; indoor and outdoor LED video displays; automotive interior lighting; and LCD backlighting.
The MAX16824 and MAX16825 integrate a pass element with a low dropout voltage, thus eliminating the need for an external power transistor.
Providing +/-5% accuracy LED current control, each of the three pass elements ensures excellent brightness matching while reducing the size, complexity and cost of the total driver solution.
The MAX16824 and MAX16825 provide an additional +5V regulated output with 4mA output current capability and thermal shutdown in the event of overheating.
Both devices are available in a thermally enhanced, 4mm x 4mm, 16-pin TSSOP package with exposed pad.
Prices start at US $0.91 (1000-up).
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