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.