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High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

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

Product Details

Key Features

Applications/Uses

Parametric specs for LED Drivers
VIN (V) (min) 6.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.35
PWM Dimming Freq. (kHz) (max) 1
Dimming Ratio (max) 200
Dimming Control Analog
PWM
VDROPOUT (mV) (typ) 550
VCURR_SENSE (mV) 200
POUT (W) 14
ICC (mA) (max) 3
LED String Volt. (V) (max) 38.6
Package/Pins SOIC (N)/8
TQFN/16
Budgetary
Price (See Notes)
1.48
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 6.5
VIN (V) (max) 40
Max. No. of LEDs 10
# LED Channels 1
Regulation Topology Linear
LED Configuration Series
ILED per Channel (A) (max) 0.35
PWM Dimming Freq. (kHz) (max) 1
Dimming Ratio (max) 200
Dimming Control Analog
PWM
VDROPOUT (mV) (typ) 550
VCURR_SENSE (mV) 200
POUT (W) 14
ICC (mA) (max) 3
LED String Volt. (V) (max) 38.6
Package/Pins SOIC (N)/8
TQFN/16
Budgetary
Price (See Notes)
1.48

Key Features

  • +6.5V to +40V Operating Range
  • Adjustable LED Current (35mA to 350mA)
  • ±3.5% LED Current Accuracy
  • High-Voltage DIM Pin for Dimming Interface
  • Integrated Pass Element with Low-Dropout Voltage (0.55V typ)
  • +5V Regulated Output with 4mA Source Capability
  • Parallel Operation for LED Current > 350mA
  • Differential LED Current Sense
  • Low Shutdown Supply Current (35µA typ)
  • Low 200mV Current-Sense Reference Reduces Power Losses
  • Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
  • Thermal Shutdown
  • Output Short-Circuit Protection
  • Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package and in 8-Pin SO with Exposed Pad Package
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • Automotive Exterior: Tail Lights and CHMSL
  • Emergency Vehicle Warning Lights
  • Navigation and Marine Indicators
  • General Lighting
  • Signage, Gasoline Canopies, Beacons

Description

The MAX16836 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 MAX16836 is adjusted by using an external current-sense resistor in series with the LEDs. A dimming input allows wide-range "pulsed" PWM operation. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16836 is well suited for applications requiring a 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 MAX16836 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and in an 8-pin SO package with exposed pad. The MAX16836 is specified over the automotive -40°C to +125°C temperature range.

Simplified Block Diagram

MAX16836: Typical Operating Circuit MAX16836: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .