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MAX16839：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

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.

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

MAX16839: Typical Application Circuit 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

DataSheet

Parametrics

Design kits & evaluation modules

• MAX16839EVKIT

Quality and Environmental Data

• MAX16839.pdf

Ordering Information