リファレンスデザイン-LED Driver

Reference Design

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White LED driver BD81A74EFV-M reference design for automotive lighting application (boost operation)

Summary

The REFLED001 is a reference design of BD81A74EFV-M LED driver IC dedicated for automotive backlight application. It is including set of evaluation reports, design resources so that users can refer to board design as well as various test report provided in the design.
BD81A74EFV-M is a white LED driver with the capability of withstanding high input voltage (maximum 35V). This driver has 4ch constant-current drivers in 1-chip, where each channel can draw up to 120mA (Max), and it is suitable for high illumination LED drive. Furthermore, a buck-boost current mode DC/DC controller is also built to achieve stable operation during power voltage fluctuation. Light modulation (10,000:1@100Hz dimming function) is possible by PWM input. The design require LED board attached to BD81A74EFV-TSB-001 board.

  • Automotive backlight reference design
  • Supporting BD81A74EFV-M in boost operation
  • Verified to satisfy EMC CISPR 25 class 5 standard at practical operating condition
  • Thermal characteristics tested
  • PCB design files are available

Specification

Product NameBD81A74EFV-TSB-001
Input Voltage7V ~ 18V
Output Channel4ch
Output Voltage20V ~34V
TopologyBoost
EMC PerformanceSatisfy CISPR25 Class5 requirement
Size60mm x 90mm

Application examples

・Automotive backlight application for cluster panel, car navigation system or car audio system

refled001

Reference Board Image

Part No.SpecificationsDesign ManualDistribution Inventory
BD81A74EFV-M4ch White LED Driver Built-in Current Driver Buck-Boost and Boost DC/DC Controller for AutomotiveReference board
User's Guide
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Evaluation data

Design Data

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