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

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

Product Details

Key Features

Simplified Block Diagram

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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 +125°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

Description

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.

Simplified Block Diagram

MAX16824, MAX16825: Typical Operating Circuit MAX16824, MAX16825: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .