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High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect

Industry's Most Cost-Effective Solution for Linear HB LED Driving with Open-LED Detect; Ideal for Automotive Lights

Product Details

Key Features

Applications/Uses

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.1
PWM Dimming Freq. (kHz) (max) 10
Dimming Ratio (max) 200
Dimming Control PWM
VCURR_SENSE (mV) 203
POUT (W) 4
ICC (mA) (max) 10
LED String Volt. (V) (max) 39.1
Package/Pins SOIC (N)/8
TDFN/6
Budgetary
Price (See Notes)
0.9
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.1
PWM Dimming Freq. (kHz) (max) 10
Dimming Ratio (max) 200
Dimming Control PWM
VCURR_SENSE (mV) 203
POUT (W) 4
ICC (mA) (max) 10
LED String Volt. (V) (max) 39.1
Package/Pins SOIC (N)/8
TDFN/6
Budgetary
Price (See Notes)
0.9

Key Features

  • 5V to 40V Operating Range
  • Integrated 2Ω Open-Drain Pass Transistor
  • 15mA to 100mA Programmable LED Current
  • PWM Dimming
  • Open-LED Fault Detection
  • Open-LED Fault Event Status Memory
  • LED Open-Fault Detect Latches Off Multiple LED Strings
  • Multichip Synchronized LED Current Sink
  • ±5% LED Current Accuracy
  • -40°C to +125°C Operating Temperature Range
  • Thermal Protection
  • Undervoltage Lockout
  • 6-Pin TDFN-EP and 8-Pin SO-EP Packages

Applications/Uses

  • Automotive Exterior: Turn Signal Light, Brake Light, Tail and Marker Lights
  • Automotive Interior: Cluster and Warning Lights, Dome and Map Lights
  • General Lighting: Signage, LED Lamps
  • Truck, Train, Airplane, and Emergency Car LED Lighting

Description

The MAX16839 programmable current regulator operates from a 5V to 40V input voltage range and features an open-drain, constant-current-sink output capable of sinking up to 100mA. The MAX16839 is well suited for automotive applications and other applications that require a general-purpose linear LED driver. The device directly withstands automotive load-dump events of up to 45V.

An on-board pass element minimizes external component count while providing ±5% output current accuracy. The MAX16839 includes a dimming input that controls the duty cycle of the output current, allowing a wide LED dimming range. In addition, the dimming input functions as an on/off control of the output current. In multiple LED-string applications, the dimming input synchronizes the LED current-sink turn-on, ensuring simultaneous brightness in LED strings.

Additional features include thermal and open-LED protection and an open-LED fault-detection output. In multiple LED string applications where all FLTS pins are connected together, an open-LED detection in one LED string turns off all the strings simultaneously. Open-LED protection also features fault memory, to avoid LED flashing during subsequent power-up cycles.

The MAX16839 is available in thermally enhanced, 6–pin TDFN-EP and 8-pin SO-EP packages and is specified over the -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX16839: Typical Application Circuit MAX16839: Typical Application Circuit 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 .