MAX16825
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MAX16825

High-Voltage, Three-Channel Linear High-Brightness LED Drivers

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

Part Details
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 +125°C Operating Temperature Range
  • Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package
Additional Details
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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 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 +125°C temperature range.

Applications

  • Architectural and Decorative Lighting
  • Automotive Lighting
  • Indoor and Outdoor LED Video Displays
  • Industrial Lighting
  • LCD Display Backlighting
  • Mood Lighting

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

MAX16824EVKIT

Evaluation Kit for the MAX16824

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MAX16824EVKIT

Evaluation Kit for the MAX16824

Evaluation Kit for the MAX16824

Features and Benefits

  • Operates from a 6.5V to 28V, 0.5A Supply
  • 3 Channels for Driving High-Brightness LEDs
  • 100mA LED Current per Channel
  • Three Independent PWM Inputs
  • PWM Dimming Control Up to 5kHz
  • Fully Assembled and Tested

Product Detail

The MAX16824 evaluation kit (EV kit) demonstrates a high-voltage, 3-channel, linear high-brightness LED (HB LED) driver using the MAX16824 IC. This EV kit is configured to supply an LED current of 100mA per channel and operates from a 0.5A, 6.5V to 28V rated power supply.

The EV kit eases evaluation of the MAX16824 pulse-width-modulation (PWM) dimming-control feature by providing three independent PWM inputs to all three channels. Each PWM input accepts a digital signal up to 5kHz.

Applications

  • Architectural and Decorative Lighting
  • Automotive Lighting
  • Indoor and Outdoor LED Video Displays
  • Industrial Lighting
  • LCD Display Backlighting
  • Mood Lighting

MAX16825EVKIT

Evaluation Kit for the MAX16825

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MAX16825EVKIT

Evaluation Kit for the MAX16825

Evaluation Kit for the MAX16825

Features and Benefits

  • Operates from a 6.5V to 28V, 0.5A Supply
  • 3 Channels for Driving High-Brightness LEDs
  • 100mA LED Current per Channel
  • Evaluates a Stand-Alone 4-Wire SPI Interface
  • USB-PC Interface (Cable Included)
  • Windows 2000/XP/Vista (32-Bit)-Compatible Software
  • Fully Assembled and Tested

Product Detail

The MAX16825 evaluation kit (EV kit) demonstrates a high-voltage, 3-channel, linear high-brightness LED (HB LED) driver using the MAX16825 IC. This EV kit is configured to supply an LED current of 100mA per channel and operates from a 0.5A, 6.5V to 28V rated power supply. The MAX16825 EV kit uses a standard 4-wire SPI™ interface for independently controlling each of the three LED channels. The MAX16825 EV kit also integrates a USB-to-SPI interface circuit based on Maxim's MAXQ2000 microcontroller. The EV kit includes Windows 2000/XP/Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX16825. The EV kit can also interface with a user-supplied SPI circuit for stand-alone operation.

Applications

  • Architectural and Decorative Lighting
  • Automotive Lighting
  • Indoor and Outdoor LED Video Displays
  • Industrial Lighting
  • LCD Display Backlighting
  • Mood Lighting

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