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High-Voltage, 350mA, Adjustable Linear High-Brightness LED (HB LED) Driver

Product Details

The MAX16800 current regulator operates from a 6.5V to 40V input voltage range and delivers up to a total of 350mA to one or more strings of high-brightness LEDs. The output current of the MAX16800 is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range "pulsed" dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16800 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection.

The MAX16800 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range.

The MAX16835 is a newer and more cost effective product that provides the same performance and is pin-to-pin compatible with the MAX16800.

Key Features

  • +6.5V to +40V Operating Range
  • Adjustable Level (35mA to 350mA)
  • ±3.5% Output Current Accuracy
  • Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
  • Output Short-Circuit Protection
  • +5V Regulated Output with 4mA Source Capability
  • Thermal Shutdown
  • Differential LED Current Sense
  • High-Voltage Enable Pin for Dimming Interface
  • Low Shutdown Supply Current (12&µA typ)
  • Low 204mV Current-Sense Reference Reduces Power Losses
  • Wave-Shaped Soft Edges Reduce Radiated EMI During PWM Dimming
  • Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive Exterior: Tail Lights and CHMSL
  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • General Illumination
  • Navigation and Marine Indicators
  • Signage, Gasoline Canopies, Beacons
  • Warning Lights for Emergency Vehicles

Simplified Block Diagram

MAX16800: Simplified Diagram MAX16800: Simplified Diagram Zoom icon

Technical Docs

Design & Development

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Support & Training

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Parameters

Key Features

  • +6.5V to +40V Operating Range
  • Adjustable Level (35mA to 350mA)
  • ±3.5% Output Current Accuracy
  • Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
  • Output Short-Circuit Protection
  • +5V Regulated Output with 4mA Source Capability
  • Thermal Shutdown
  • Differential LED Current Sense
  • High-Voltage Enable Pin for Dimming Interface
  • Low Shutdown Supply Current (12&µA typ)
  • Low 204mV Current-Sense Reference Reduces Power Losses
  • Wave-Shaped Soft Edges Reduce Radiated EMI During PWM Dimming
  • Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive Exterior: Tail Lights and CHMSL
  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • General Illumination
  • Navigation and Marine Indicators
  • Signage, Gasoline Canopies, Beacons
  • Warning Lights for Emergency Vehicles

Description

The MAX16800 current regulator operates from a 6.5V to 40V input voltage range and delivers up to a total of 350mA to one or more strings of high-brightness LEDs. The output current of the MAX16800 is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range "pulsed" dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16800 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection.

The MAX16800 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range.

The MAX16835 is a newer and more cost effective product that provides the same performance and is pin-to-pin compatible with the MAX16800.

Simplified Block Diagram

MAX16800: Simplified Diagram MAX16800: Simplified Diagram 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