MAX16824:High-Voltage, Three-Channel Linear High-Brightness LED Drivers

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

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.

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
MAX16824, MAX16825: Typical Operating Circuit
MAX16824, MAX16825: Typical Operating Circuit
Applications/Uses
  • Architectural and Decorative Lighting
  • Automotive Lighting
  • Indoor and Outdoor LED Video Displays
  • Industrial Lighting
  • LCD Display Backlighting
  • Mood Lighting
DataSheet
titleDownload file
MAX16824-MAX16825 Data SheetMAX16824-MAX16825.pdf
Parametrics
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
MAX16824Linear93Series-Parallel0.153200PWM750200156.5281038.6TSSOP-EP/16$1.70 @1k
MAX16825SPI SerialTSSOP-EP/16$1.42 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16824AUE+ActiveTSSOP-EP,;16 pin;33.2 mm²-40°C to +125°CLead Free
MAX16824AUE+TActiveTSSOP-EP,;16 pin;33.2 mm²-40°C to +125°CLead Free
MAX16824AUE/V+ActiveTSSOP-EP,;16 pin;33.2 mm²-40°C to +125°CLead Free
MAX16824AUE/V+TActiveTSSOP-EP,;16 pin;33.2 mm²-40°C to +125°CLead Free
MAX16824-MAX16825.pdf MAX16825
MAX16824-MAX16825_cn.pdf MAX16825
MAX16824.pdf MAX16824
MAX16824-MAX16825_cn.pdf MAX16825