General Description
The MAX16809 is an integrated, high-efficiency white or
RGB LED driver. It is designed for LCD backlighting
and other LED lighting applications with multiple strings
of LEDs. The MAX16809’s current-mode PWM con-
troller regulates the necessary voltage to the LED array.
Depending on the input voltage and LED voltage
range, this device can be used with boost or buck-
boost (SEPIC) topologies.
The MAX16809 LED driver includes 16 open-drain, con-
stant-current-sinking LED driver outputs rated for 36V
continuous operation. The LED current-control circuitry
achieves ±3% current matching among strings and
enables paralleling of outputs for LED string currents
higher than 55mA. The output-enable pin is used for
simultaneous PWM dimming of all output channels.
Dimming frequency range is 50Hz to 30kHz and dim-
ming ratio is up to 5000:1. The constant-current outputs
are single resistor programmable and the LED current
can be adjusted up to 55mA per output channel.
The MAX16809 operates either in stand-alone mode or
with a microcontroller (μC) using an industry-standard, 4-
wire serial interface.
The MAX16809 includes overtemperature protection,
operates over the full -40°C to +125°C temperature
range, and is available in a 5mm x 7mm thermally
enhanced, 38-pin TQFN exposed paddle package.
Features
♦ 16 Constant-Current Output Channels (Up to
55mA Each)
♦ ±3% Current Matching Among Outputs
♦ Paralleling Channels Allows Higher Current per
LED String
♦ Outputs Rated for 36V Continuous Voltage
♦ Output-Enable Pin for PWM Dimming (Up to 30kHz)
♦ One Resistor Sets LED Current for All Channels
♦ Wide Dimming Ratio Up to 5000:1
♦ Low Current-Sense Reference (300mV) for High
Efficiency
♦ 8V to 26.5V Input Voltage or Higher with External
Biasing Devices
♦ 4-Wire Serial Interface to Control Individual
Output Channels
Applications
LCD White or RGB LED Backlighting:
LCD TVs, Desktop, and Notebook Panels
Automotive Navigation, Heads-Up,
and Infotainment Displays
Industrial and Medical Displays
Ambient, Mood, and Accent Lighting
MAX16809
Integrated 16-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
________________________________________________________________
Maxim Integrated Products
1
19-0656; Rev 2; 8/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
Ordering Information