NCV7683: LED Driver, Automotive, Octal, 100 mA Sequencing

Datasheet: Enhanced 100 mA Linear Current Regulator and Controller for Automotive Sequenced LED Lighting
Rev. 4 (214kB)
Product Overview
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The NCV7683 consists of eight 100 mA linear programmable constant current sources. The part is designed for use in the regulation and control of LED based Rear Combination Lamps and blinking functions for automotive applications. System design with the NCV7683 allows for two programmed levels for stop (100% Duty Cycle) and tail illumination (programmable Duty Cycle), or an optional external PWM control can be implemented. LED brightness levels are easily programmed (stop is programmed to the absolute current value, tail is programmed to the duty cycle) with two external resistors. The use of an optional external ballast FET allows for power distribution on designs requiring high currents. Set back power limit reduces the drive current during overvoltage conditions. This is most useful for low power applications when no external FET is used. Sequencing functionality is activated, controlled, and programmed by individual pins. In addition to programming of the sequence interval, the device can sequence 8 individual output channels, 4 pairs of output channels, 2 quad output channels, or all 8 at once (for multi IC use at high currents). Enhanced features of this device are a global enable function and display sequencing. The device is available in a SSOP−24 package with exposed pad.
Features   Benefits
  • Constant Current Outputs for LED String Drive
  • Current source drive optimized for LED drive.
  • LED Drive Current up to 100mA per Channel
  • Flexibility for lower current LEDs.
  • Open LED String Diagnostic with Open-Drain Output in All Modes
  • Detection of open loads is detected in STOP, TAIL, and Sequence On modes.
  • Slew Rate Control
  • Eliminates EMI concerns.
  • Low Dropout Operation
  • Allows operation in Pre-Regulator Applications.
  • External Modulation Capable.
  • User defined LED intensity.
  • On-Chip 800 Hz Tail PWM Dimming
  • Removes PWM feature out of the microprocessor.
  • Single Resistor for Stop Current Set Point
  • Easily programmable across platforms.
  • Single Resistor for Tail Dimming Set Point
  • Easily programmable across platforms.
  • Overvoltage Set Back Power Limitation
  • Allow longer functionality in extended input voltage range..
  • AEC-Q100 Qualified and PPAP Capable
  • Fits in automotive applications.
  • SSOP-24 Fused Lead Package with Exposed Pad
  • Thermally enhanced package for higher power operation.
  • Improved EMC Performance
  • Eliminated need for inductive bead on Vbat.
  • Programmable Latch-Off function on Open String
  • Designer flexibility to one off, all off LED turn off feature.
  • Overtemperature Fault Reporting
  • Noification of unacceptable operational condition.
  • Global Enable
  • Allows sequencing of multiple NCV7683 devices.
  • Display Sequencing
  • Implements blinker functionality.
Applications   End Products
  • Automotive Rear Combination Lamps
  • Automotive Daytime Running Lights
  • Automotive Fog Lights
  • Automotive Center High Mounted Stop Lamps (CHMSL)
  • Turn Signal and Other Externally Modulated Applications
  • Signature Lamp
  • Automobile
Technical Documentation & Design Resources
Data Sheets (1) Evaluation Board Documents (5)
Package Drawings (1)  
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCV7683GEVB Active
8 Channel Enhanced 100 mALinear Current Regulator and Controller for Automotive LED Lighting in Daisy Chain Sequencing Application Evaluation Board
Availability & Samples
Interactive Block Diagram
Budgetary Price/Unit
Case Outline
NCV7683DQR2G Active
AEC Qualified
PPAP Capable
Halide free
NCV7683 SSOP-24 NB EP 940AP 3 260 Tape and Reel 2500 $1.1957
Market Leadtime (weeks) : Contact Factory

Pricing ($/Unit)
VI Max (V)
IO Max (mA)
LEDs in Series, Max #
LEDs in Parallel, Max #
Package Type
Case Outlines
Previously Viewed Products
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New Products

NCV7691  NCV7692  Current Controllers for Automotive LED Lighting

  • Constant current output for LED string drive
  • Dedicated dimming feature via PWM input
  • Multiple LED string control with one controller

NCV7685  12-Channel Linear Current Driver for Automotive LED Lighting

  • Twelve current sources with global current setting up to 60 mA and diagnostics
  • Independent PWM duty cycle control via I2C for each channel
  • Operates as stand-alone or MCU-controlled, and with optional external MOSFET ballast transistor

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