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Maxim > Products > [Automotive] 
MAX16819, MAX16820
2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming

High-Brightness Step-Down LED Driver Controllers with High-Side Current-Sensing and Rapid Current-Pulsing Capability


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 220kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX16819/MAX16820, step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective solution for automotive interior/exterior lighting, architectural and ambient lighting, LED bulbs such as MR16 and other LED illumination applications.

The MAX16819/MAX16820 operate from a 4.5V to 28V input voltage range and feature a 5V/10mA on-board regulator. A high-side current-sense resistor adjusts the output current and a dedicated PWM input (DIM) enables a wide range of pulsed dimming.

The MAX16819/MAX16820 are well suited for applications requiring a wide input voltage range. The high-side current-sensing and an integrated current-setting circuitry minimize the number of external components while delivering an LED current with ±5% accuracy. A hysteretic control algorithm ensures excellent input-supply rejection and fast response during load transients and PWM dimming. The MAX16819 features a 30% inductor current ripple and the MAX16820 features a 10% current ripple. These devices operate up to 2MHz switching frequency, thus allowing for small component size.

The MAX16819/MAX16820 operate over the -40°C to +125°C automotive temperature range and are available in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.

An evaluation kit is available:  MAX16820EVKIT  

Key Features   Applications/Uses
  • High-Side Current Sense
  • Dedicated Dimming Control Input
  • 20kHz Maximum Dimming Frequency
  • Hysteretic Control: No Compensation
  • Up to 2MHz Switching Frequency
  • ±5% LED Current Accuracy
  • Adjustable Constant LED Current
  • 4.5V to 28V Input Voltage Range
  • Over 25W Output Power
  • 5V, 10mA On-Board Regulator
  • -40°C to +125°C Operating Temperature Range

 
  		• Architectural, Industrial, and Ambient Lighting
  		• Automotive RCL, DRL, and Fog Lights
  		• Heads-Up Display
  		• Indicators and Emergency Lighting

    Key Specifications:  High Brightness LED Drivers
    Part Number Topology VIN
    (V)    		 VIN
    (V)    		 Extended VIN with External Bias LED Channels ILED per Channel
    (A)    		 LED String Volt. Internal Pwr. MOSFETs Freq. PWM Dimming Freq.
    (kHz)    		 PWM Dimming Ratio EV Kit Price
    min max max max max max See Notes
    MAX16819  Buck 4.5 28 No
    1
    1
    		 3 26V No 20kHz to 2MHz 20 1:5000 No $0.58 @1k
    MAX16820  Yes $0.58 @1k
    See All High Brightness LED Drivers (26)

    Diagram
    MAX16819, MAX16820: Simplified Diagram
    Simplified Diagram

    Application Notes
  		• Application Note 4381: MR-16 LED Driver with a 5V Auxiliary Output to Power a Pulsating LED Cooler - MAX16820
  		• Application Note 4382: Reference Design for a 5S2P AR111 Lamp LED Driver - MAX16820

    Evaluation Kits
  		• MAX16820EVKIT

    Design Guides
  		• Automotive (PDF)

    Reliability Reports
  		• Reliability Report: MAX16820.pdf
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
  		• MAX16820 Inductor and Sense Resistor Design Tool
  		• LED Driver Macromodel

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    MAX16819 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16819ATT+  
    		Active TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16819ATT+T    
    		Active TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16820 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16820ATT+  
    		Active TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16820ATT+T    
    		Active TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX16819 MAX16820
  		• New Product Press Release 2007-02-08 
  		• Product Ad: Download
  		• Design Calculator for the MAX16819/MAX16820

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    Document Ref.: 19-0706; Rev 1; 2007-03-20
    This page last modified: 2007-11-19


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