MAX16824

High-Voltage, Three-Channel Linear High-Brightness LED Drivers

Independently Dimmable, Three-Channel LED Drivers for Compact and Simple Driver Circuits


Please check latest availability status for a specific part variant.

Description

The MAX16824/MAX16825 three-channel LED drivers operate over a 6.5V to 28V input voltage range. These devices provide three open-drain constant-current-sinking outputs that are rated to 36V and deliver up to 150mA of current to each string of high-brightness LEDs (HB LEDs). The current at each output is programmable by means of an external current-sense resistor. The MAX16824 features three PWM inputs that control the duty cycle of the output current, allowing a wide LED dimming range to be implemented. The PWM inputs also function as on/off control for each corresponding output. The MAX16825 offers a 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The serial interface allows a microcontroller to configure the output channels using four inputs (DIN, CLK, LE, active-low OE) and a data output (DOUT). DOUT allows multiple drivers to be cascaded and operated together.

The MAX16824/MAX16825's on-board pass elements minimize the need for external components, while at the same time, providing ±5% LED current accuracy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection.

The MAX16824/MAX16825 are available in a thermally enhanced 16-pin TSSOP-EP package and specified over the -40°C to +125°C temperature range.
MAX16824, MAX16825: Typical Operating Circuit MAX16824, MAX16825: Typical Operating Circuit Enlarge+

Key Features

  • 6.5V to 28V Operating Range
  • Outputs Connected to 36V Supply for Long LED Strings
  • Three 36V-Rated Output Channels with Independently Adjustable LED Current
  • 150mA Output Current Per Channel
  • ±5% LED Current Accuracy
  • PWM Dimming
    • Three Independent Dimming Control Inputs (MAX16824)
    • 4-Wire Serial Interface LED Current Chopping (MAX16825)
  • +5V (±5%) Regulated Output with 4mA Source Capability
  • Fast Transient Dimming Response
  • 200mV Current-Sense Reference Reduces Power Loss
  • Thermal Shutdown
  • -40°C to +125°C Operating Temperature Range
  • Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package

Applications/Uses

  • Architectural and Decorative Lighting
  • Automotive Lighting
  • Indoor and Outdoor LED Video Displays
  • Industrial Lighting
  • LCD Display Backlighting
  • Mood Lighting

See parametric specs for LED Drivers (81)


Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming RatioDimming ControlVDROPOUT
(mV)
VCURR_SENSE
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Package/PinsBudgetary
Price
maxmaxmaxtypminmaxmaxmaxSee Notes
MAX16824 Linear93Series-Parallel0.153200PWM750200156.5281038.6
TSSOP/16
$1.79 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX16825EVKIT: Evaluation Kit for the MAX16825
MAX16824EVKIT: Evaluation Kit for the MAX16824
Product Reliability Reports: MAX16824.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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