Products, Materials + Tools | Dec 04, 2007

Independently Dimmable, Three-Channel LED Drivers for Compact and Simple Driver Circuits

The MAX16824/MAX16825 three-channel LED drivers operate over a 6.5V to 28V input voltage range. These devices provide three open-drain constant-current-sinking outputs that are rated to 36V and deliver up to 150mA of current to each string of high-brightness LEDs (HB LEDs).

The current at each output is programmable by means of an external current-sense resistor. The MAX16824 features three PWM inputs that control the duty cycle of the output current, allowing a wide LED dimming range to be implemented. The PWM inputs also function as on/off control for each corresponding output. The MAX16825 offers a 2Mbps, 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The serial interface allows a microcontroller to configure the output channels using four inputs (DIN, CLK, LE, active-low OE) and a data output (DOUT). DOUT allows multiple drivers to be cascaded and operated together.

The MAX16824/MAX16825's on-board pass elements minimize the need for external components, while at the same time, providing ±5% LED current accuracy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection.

The MAX16824/MAX16825 are available in a thermally enhanced 16-pin TSSOP-EP package and specified over the -40°C to +85°C temperature range.

Key Features:
6.5V to 28V Operating Range
Outputs Connected to 36V Supply for Long LED Strings
Three 36V-Rated Output Channels with Independently Adjustable LED Current
150mA Output Current Per Channel
±5% LED Current Accuracy
PWM Dimming
Three Independent Dimming Control Inputs (MAX16824)
4-Wire Serial Interface LED Current Chopping (MAX16825)
+5V (±5%) Regulated Output with 4mA Source Capability
Fast Transient Dimming Response
200mV Current-Sense Reference Reduces Power Loss
Thermal Shutdown
-40°C to +85°C Operating Temperature Range
Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package

Applications/Uses:
Architectural and Decorative Lighting
Automotive Lighting
Indoor and Outdoor LED Video Displays
Industrial Lighting
LCD Display Backlighting
Mood Lighting
 
About Maxim Integrated Products:
Maxim Integrated Products was established in 1983. In 2001, Maxim acquired Dallas Semiconductor. Our mission is to continuously invent high-quality analog and mixed-signal engineering solutions that add value to our worldwide customers' microprocessor-based electronics. We have consistently served both our customers and our stockholders by meeting our cost and performance goals, minimizing time-to-market, and maximizing our engineering productivity.

Add comment

You can add a comment by filling out the form below. Plain text formatting. Comments are moderated.

Question: What is 1 + 5 ?
Your answer:
FEATURED

Edison Released Brand New DOB III Series Products

Edison Released Brand New DOB III Series Products The DOB III series increased the efficiency, dimming smoothness also provide ultra- low flicker function (flicker 5% and even 5% during dimming). It is compliant to the 2021 European flicker standard IEC TR61547( PstLM) and to CIE TN006 (SVM) on request. It can be applied in many different lighting ... Read more »

FEATURED

Versatile and Ultrafast – The New CAS 125 Series of Spectroradiometers for LED Production

Versatile and Ultrafast – The New CAS 125 Series of Spectroradiometers for LED Production Instrument Systems – a well-known manufacturer of light measurement technology – works closely with its customers in the field of LED production to develop modular and flexible components for quality inspection in mass production environments. For the new spectroradiometer CAS 125, Instrument ... Read more »