power Consumption / thermal Control
High-powered LEDs used for external lamps
require a lot of current, and that power needs to
be controlled to limit the temperatures in and
around the electronics.
Space Constraints
Automotive LED lamps are space constrained, so
the size of the LEDs, their control circuitry, and the
printed circuit board(s) are critical factors . Fitting
LEDs into the space traditionally reserved for lamps
was the first challenge, and shrinking them even
more to meet automotive advancements is the next.
Cost of Solution
LED technology has existed for decades, but the
cost of LED driver solutions has been a limiting
factor slowing their adoption in the automotive
space, as LED lamps require more control circuitry
and components to operate efficiently.
IPD
LIN/CXPI
SBD MOSFET
Protection
SBD
TVS
SBD
MOSFET Resistor
Power Management
R i SBD MOSFET
Linear
Regulator
Switching
Regulator
Interface
TVS
CAN
Transceiver
Op Amp
ADC/DAC
MCU
Comp
Memory
Reset/WDT
SBD
MOSFET
Resistor
Signal Control
R i t SBD R OS
MOSFET
MOSFET
LIN
Bus
CAN
Bus
Motor Driving
Stepping
Motor Driver
BLDC
Motor Driver
H-Bridge
Driver
Temperature
Light
High Beam/Low Beam
Leveling
Swiveling
Shaping/Curve
Washer
FAN
DRL
Fog Lamp
Position Lamp
Turn Lamp
M
M
M
M
Battery
Bipolar
Transiator
Bi l
LED Driving
Multi-ch
LED Driver
LED Driver
MOSFET Low
Ohmic
Resistor
L OS MOSFET
SBD MOSFET
Low
Ohmic
Resistor
L
SBD SBD MOSF MOSFET ET
Figure 2: Example LED Lamp Module Circuitry
4
The Challenges of Driving LEDs
These components need to be rated for automotive
use and meet stringent requirements.
