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High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

Smallest, High-Voltage, 350mA High-Brightness LED Driver Simplifies LED Lighting Applications, Minimizes External Part Counts, and Saves Cost and Space

Product Details

Key Features

Parametric specs for LED Drivers
VIN (V) (min) 6.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.35
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 200
Dimming Control PWM
VDROPOUT (mV) (typ) 500
VCURR_SENSE (mV) 198
POUT (W) 14
ICC (mA) (max) 3
LED String Volt. (V) (max) 38.6
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.45
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 6.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.35
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 200
Dimming Control PWM
VDROPOUT (mV) (typ) 500
VCURR_SENSE (mV) 198
POUT (W) 14
ICC (mA) (max) 3
LED String Volt. (V) (max) 38.6
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.45

Key Features

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

Applications/Uses

  • Automotive Exterior: Rear Combination Lights (RCL)
  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • Emergency Vehicle Warning Lights
  • General Lighting
  • Navigation and Marine Indicators
  • Signage, Gasoline Canopies, Beacons

Description

The MAX16803 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 (HB LEDs). The output current of the MAX16803 is adjusted by using an external current-sense resistor in series with the LEDs. A dimming input allows widerange "pulsed" PWM operation. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16803 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 MAX16803 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 MAX16836 is a newer and more cost effective product; except for different PWM dimming current slew rates, it provides the same performance and is pin-to-pin compatible with the MAX16803.

Simplified Block Diagram

MAX16803: Simplified Diagram MAX16803: 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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.