Product category:
Power Supply ICs and Controllers
News Release from: Micrel | Subject: MIC3289
Edited by the Electronicstalk Editorial
Team on 06 March 2007
White LED driver simplifies control
PWM white LED driver incorporates internal Schottky diode and true single-wire digital interface for brightness control and enable.
Micrel has launched the MIC3289, a 1.2MHz PWM white LED driver featuring internal Schottky diode and true single wire digital interface for brightness control and enable The MIC3289 is currently available in volume and in two package choices: a TSOT-23-6 and a 2 x 2mm MLF 8L package
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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"The single wire digital interface used in Micrel's MIC3289 provides both brightness control and the enable function".
"This reduces the number of GPIOs needed to control the device and is especially advantageous in clamshell phone designs where limited traces can be routed through the flex cable", noted Ralf Muenster, Micrel's Director of Marketing for Power Products.
"In addition, the part features 16 logarithmic dimming steps, mimicking the way the human eye perceives brightness levels, allowing to minimise programming steps when compared with industry standard products which offer 32 linear steps".
The MIC3289's full operating input voltage range of 2.5 to 6.5V supports use with popular power sources including Li-ion battery, multicell alkaline, 5V AC adapter and USB port.
The MIC3289 requires a mere four external components to provide a complete solution.
The integration of the Schottky diode and the tiny 2 x 2mm MLF packaging allows for solution sizes up to 50% smaller than the competition.
The device is also protected with an OVP circuit and is available in 16 and 24V overvoltage protection options, supporting up to six white LEDs at 20mA each.
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