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

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

Product Details

Key Features

Applications/Uses

Parametric specs for LED Drivers
VIN (V) (min) 5.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 3
Regulation Topology Linear
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.1
PWM Dimming Freq. (kHz) (max) 3
Dimming Ratio (max) 200
Dimming Control PWM
VDROPOUT (mV) (typ) 700
VCURR_SENSE (mV) 203
POUT (W) 12
ICC (mA) (max) 3
LED String Volt. (V) (max) 39.1
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
1.82
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 5.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 3
Regulation Topology Linear
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.1
PWM Dimming Freq. (kHz) (max) 3
Dimming Ratio (max) 200
Dimming Control PWM
VDROPOUT (mV) (typ) 700
VCURR_SENSE (mV) 203
POUT (W) 12
ICC (mA) (max) 3
LED String Volt. (V) (max) 39.1
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
1.82

Key Features

  • 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

Applications/Uses

  • 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

Description

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.

Simplified Block Diagram

MAX16823: Block Diagram MAX16823: Block 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 .