For Automotive, 40V 150mA 4ch Constant Current LED Driver

BD18347EFV-M are 40V-withstanding constant current LED driver for automotive applications. It is a 4 channel LED driver with the built-in energy sharing control which can realize to make the board size small. High reliability can be realized with LED Open Detection, the OUTx (all later x=1 to 4) pin Short Circuit Protection, Over Voltage Mute and Thermal Shutdown Function. In case the output OUTx pin has 3 LEDs in series, BD18337EFV-M has to be used, in case of 2 LEDs in series, this BD18347EFV-M has to be used.

Product Detail

Part Number | BD18347EFV-ME2
Status | Recommended
Package | HTSSOP-B16
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes

Functional Safety:

Category : FS supportive
A product that has been developed for automotive use and is capable of supporting safety analysis with regard to the functional safety.


Common Standard

AEC-Q100 (Automotive Grade)


Constant Current


LED Source Driver

LED Configuration

2 series, 4 parallels



Per Channel Drive(Max.)[mA]






Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]


Package Size [mm]

5x6.4 (t=1)


  • AEC-Q100 Qualified (Grade 1)
  • Energy Sharing Control
  • PWM Dimming Function
  • License Lamp Mode
  • LED Open Detection
  • OUTx pin Short Circuit Protection (SCP)
  • Over Voltage Mute Function (OVM)
  • Disable LED Open Detection Function at Reduced-Voltage
  • LED Failure Input/Output Functions (PBUS)

Design Resources



White Paper

  • Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs
  • ROHM Automotive Lighting Solutions

Technical Articles

Schematic Design & Verification

  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Two-Resistor Model for Thermal Simulation
  • What Is Thermal Design
  • Basics of Thermal Resistance and Heat Dissipation
  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance


Simulations (Login Required)

ROHM Solution Simulator is a new web-based electronic circuit simulation tool that can carry out a variety of simulations, from initial development that involves component selection and individual device verification to the system-level verification stage. This makes it possible to quickly and easily implement complete circuit verification of ROHM power devices and ICs, in simulation circuits under close to actual conditions, significantly reducing application development efforts.
  • BD18347EFV / Energy Sharing Control
  • BD18347EFV / Cold Crank Profile Test
  • BD18337EFV/BD18347EFV Simulation Guide (ROHM Solution Simulator)


  • BD18347EFV-M PSPICE Model
  • BD18347EFV-M Spice Modeling Report
  • Unencrypted SPICE Model (Inquiry Form)
  • Two-Resistor Thermal Model Report for BD18347EFV-M


  • BD18347EFV-M Footprint / Symbol
  • HTSSOP-B16 Footprint / Symbol

Packaging & Quality

Package Information

  • Package Information

Manufacturing Data

  • Factory Information

Environmental Data

  • REACH SVHC Non-use Declaration