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MAX16823
High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection

Highly Integrated, High-Voltage LED Driver Ideal for Automotive Applications


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 196kB)
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  Create a design and simulate with EE-Sim: [MAX16823]

The MAX16823 three-channel LED driver operates from a 5.5V to 40V input voltage range and delivers up to 100mA per channel to one or more strings of high-brightness LEDs (HB LEDs). Each channel's current is programmable using an external current-sense resistor in series with the LEDs. Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and off control of the outputs. Wave-shaping circuitry reduces EMI while providing fast turn-on and turn-off times.

The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy. Additional features include an active-high, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output current capability, short-circuit and thermal protections.

The MAX16823 is available in thermally enhanced 5mm x 5mm, 16-pin TQFN-EP and 16-pin TSSOP-EP packages and is specified over the -40°C to +125°C automotive temperature range.

An evaluation kit is available:  MAX16823EVKIT  

Key Features   Applications/Uses
  • 5.5V to 40V Operating Range
  • Adjustable Constant Output Current (5mA to 100mA and Up to 2A with External BJT)
  • ±5% Output Current Accuracy
  • Open LED Detection
  • Three Independent High-Voltage DIM Inputs
  • Three Integrated Pass Elements with Low Dropout Voltage (0.7V max)
  • Undervoltage Lockout
  • Output Short-Circuit Protection
  • 3.4V Voltage Regulator with 4mA Capability
  • Accurate, Low 203mV Current Sense
  • Overtemperature Shutdown
  • -40°C to +125°C Operating Temperature Range

 
  • Architecture and Industrial Lighting
  • Automotive Exterior: Rear Combination Lights (RCLs), CHMSL
  • Automotive Interior: RGB Ambient Lighting, Cluster Lighting, and LCD Backlighting
  • Emergency Vehicle Warning Lights
  • Navigation and Marine Indicators

    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 PWM Dimming Freq.
    (kHz)
    PWM Dimming Ratio Design Tools EV Kit Price
    min max max max max max See Notes
    MAX16823  Linear Current Regulator 5.5 40 No
    3
    3
    0.1 Vin-0.9V Yes 3 1:200 EE-Sim Yes $1.02 @1k
    See All High Brightness LED Drivers (26)

    Diagram
    MAX16823: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-0733; Rev 2; 2008-11-20
    This page last modified: 2008-11-20


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