AUTOMOTIVE_Catalog_Ver.2.1

LAMP MODULE Products

BODY

&

COMFORT

LTR

Low Ohmic Chip Resistors

Broad lineup of high power high

reliability low ohmic resistors

offered in a range of sizes (

to 6432).

LTR Series

PMR Series

P.79 to 81

Memory

Operational Amplifier

Comparator

Voltage Detector

(Reset ICs)

Rectifier Diodes P.

High power Chip Resistors

(Wide terminal type)

P.

P.

P.

P.

BLDC Motor Driver P.

LIN Transceiver P.

Voltage Regulator P.

UMD

Integrated high-performance

constant current circuit ensures

an LED current accuracy of

±3%. Multiple protection

functions also included (e.g.

open/short detection).

LED Drivers (For Rear Lamps) BD8374EFJ-MBD8374HFP-M

HTSSOP-B

Built-in boost-buck switching
regulator supports a variety of LED
configurations, while an internal
PWM dimming function enables
control without an MCU.

LED Driver (For Headlights) BD8381AEFV-M

Bi-Directional Zener Diode

Bi-Directional Zener Diode

series optimized for LIN & CAN.

RSB Series

DPAK

Supports a variety of drive

circuits (i.e. LEDs). Advanced

processes provide low ON

resistances.

MOSFET 100V Series60V Series

P.24 P.47, P.54 to 55

PMDU

Select from among 4 different series
to meet application requirements for
VF and IR.

Schottky Barrier Diodes Ultra Low ILow VF SeriesR Series

P.48 to 50, P.60 to 64 P68 to 70

Memory

Operational Amplif ier

Comparator

Voltage Detector

(Reset IC)

P47, P54 to 55

HTSOP-J

HRP

Battery

Leveling Motor

Front Light

Washer Motor

Rear Lamp

Front Lamp

Temp &

Light Sensors

Cooling Fan

Stop

Rear

Signal

Conditioner

BLDC

Motor

Driver

LED

Driver

H-Bridge

Driver

H-Bridge

Driver

Power

Protection

Voltage

Regulator

LED

Driver

+12V Battery

MOSFET SBD Low Ohmic

Resistor MOSFETLow OhmicResistor

MOSFET SBD Low OhmicResistor

MOSFETLow Ohmic

Resistor

MOSFETLow OhmicResistor

Bi-Zener

I/O

Protection

MCU

Anti-Surge

Resistor

LED

Driver

MOSFET SBD Low OhmicResistor

Technology for the automotive future

Automotive exterior lamps, can be broadly classified into head and rear lamps. These lamps are increasingly transitioning to the

use of LEDs, which feature lower power consumption and longer life besides providing a greater design flexibility.

One of the biggest drawback of LEDs, is that they generate a relatively large amount of heat, and therefore

require cooling, sometimes using fans, particularly for the high and low beam lamps (see block diagram below).

Fan speed is adjusted based on the amount of heat generated by the LEDs.

Many newer vehicles also integrate a self-leveling headlight function that determines if

the car is tilted forward or back and adjusts the headlights accordingly to ensure they

are pointed at road at all times no matter the position of the car in order to prevent

blinding oncoming drivers. This functionality is called levelling. ROHM offers a wide

range of dedicated LED drivers optimized for automotive LED applications.