MAX16835:High-Voltage, 350mA, Adjustable Linear High-Brightness LED Driver

350mA LED Driver Provides 3.5% Current Accuracy for Long LED Strings

The MAX16835 current regulator operates from a 6.5V to 40V input voltage range and delivers up to a total of 350mA to one or more strings of high-brightness LEDs (HB LEDs). The output current of the MAX16835 is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range "pulsed" dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16835 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection. The MAX16835 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range.

Key Features
  • +6.5V to +40V Operating Range
  • Adjustable LED Current (35mA to 350mA)
  • ±3.5% Output Current Accuracy
  • Integrated Pass Element with Low-Dropout Voltage (0.55V typ)
  • Output Short-Circuit Protection
  • +5V Regulated Output with 4mA Source Capability
  • Thermal Shutdown
  • Differential LED Current Sense
  • High-Voltage Enable Pin for Dimming Interface
  • Low Shutdown Supply Current (35µA typ)
  • Low 200mV Current-Sense Reference Reduces Power Losses
  • Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
  • Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
  • -40°C to +125°C Operating Temperature Range
MAX16835: Simplified Diagram
MAX16835: Simplified Diagram
Applications/Uses
  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • Automotive Exterior: Tail Lights and CHMSL
  • Warning Lights for Emergency Vehicles
  • Navigation and Marine Indicators
  • General Illumination
  • Signage, Gasoline Canopies, Beacons
DataSheet
titleDownload file
MAX16835 Data SheetMAX16835.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
MAX16835Linear101Series0.351200PWM550200146.540338.6TQFN/16$1.36 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16835ATE+ActiveTQFN,;16 pin;26 mm²-40°C to +125°CLead Free
MAX16835ATE+TActiveTQFN,;16 pin;26 mm²-40°C to +125°CLead Free
MAX16835.pdf MAX16835
MAX16835.pdf MAX16835