Reference Design

A system-level evaluation board that combines ROHM's IC and discrete products. We have already solved not only the characteristics of individual products but also the problems that may occur when combining them to build a system, thus contributing significantly to the reduction of development time for our customers.

4ch White LED driver BD83A14EFV-M reference design for automotive panel backlight application(boost operation)


The REFLED004 is a reference design of BD83A14EFV-M LEDdriver 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.
BD83A14EFV-M is a white LED driver for LCD backlight. It has 4ch current drivers for LED drive, making it ideal for high brightness LED drive. LED pin maximum voltage is 50 V, making it suitable for driving large LCD panels.
The dimming is controlled by the PWM signal and can be set up to 20,000: 1@100 Hz. It also supports analog dimming, and can accommodate even higher brightness ranges by combining with PWM dimming.
The design require LED board attached to REFLED004-EVK-001 board.


  • Automotive backlight reference design
  • Supporting BD83A14EFV-M in boost operation
  • Thermal characteristics tested
  • PCB design files are available


Name of reference boardREFLED004-EVK-001
Input voltage7V to 18V
Nb of outputs4ch
Output voltage120mA/ch
EMC perfomanceBoost
Dimension60mm x 90mm

Application examples

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


Reference Board Image

Product namefeatureSpiceUn-encrypted Spiceweb simsymbol&
3D Modelthermal
Calc toolEVK, Eval board
for individual product
BD83A14EFV-M4ch White LED Driver for Automotive----
RB088LAM-60TF60V/5A SBD---
(Under development)
40V/24A PchFET--------
(Under development)
60V/12A NchFET--------
LTR10LEZPFL1220mm, 1.0W--------

Evaluation data

Design Data