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CAT4026: LED Controller, 6-Channel, with Fault Diagnostics

Datasheet: LED Controller, 6-Channel, with Fault Diagnostics
Rev. 5 (324.0kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
The CAT4026 is a high performance, large panel LED controller designed to control six constant current high voltage LED strings. Added control circuitry monitors the lowest cathode voltage and generates a feedback control signal to an external Switch Mode Power Supply (SMPS) to provide a low cost and efficient solution for large panel high voltage LED backlighting.

Each LED channel current is accurately matched and controlled by sensing an external resistor in series with a low cost bipolar power transistor. This allows current and heat dissipation concerns to be mitigated from the CAT4026 device package.

For added system reliability, both Open-Cathode-Anode (OCA) and Shorted-Cathode-Anode (SCA) fault detection circuitry has been included along with independent Fault flag logic outputs for diagnostic purposes.

LED current dimming in all six channels can be precisely controlled by either a Pulse Width Modulation signal via the PWM input pin or by an analog dimming voltage applied at the ANLG pin. In addition the ANLG pin provides a convenient method for limiting the overall maximum power dissipation in the event of excessive LED shorting within any LED string.

The device will automatically enter low current shutdown mode by taking the PWM pin low for an extended length of time.
Features   Benefits
     
  • Adaptive Feedback Control to External SMPS for Better Efficiency
 
  • Enhanced power efficiency of the external SMPS
  • PWM and Analog Mode Dimming
 
  • Extended range of dimming control
  • Open Cathode-Anode (OCA) Fault Protection
 
  • Robustness in case of LED disconnect or large LED string voltage mismatch
  • 6 Channel LED Controller
   
  • Short Cathode-Anode (SCA) Fault Protection
   
  • Over-Voltage Protection
   
  • Thermal Shutdown Protection
   
  • Automatic Inactivity Power Down Mode
   
Applications   End Products
  • LED Backlighting
 
  • LCD TVs
Technical Documentation & Design Resources
Application Notes (2) Package Drawings (1)
Data Sheets (1) FAQ (1)
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT4026V-T1 Consult Sales Office
Pb-free
Halide free
CAT4026 SOIC-28W 751BM 3 260 Tape and Reel 1000  
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <1K
Case Outlines
751BM   
Packages
CAT4026: LED Controller, 6-Channel, with Fault Diagnostics
CAT4026: LED Controller, 6-Channel, with Fault Diagnostics
Previously Viewed Products
Clear List

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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