LED Drivers for Instrument Cluster Backlights
LED drivers are a
constant-current source commonly used to power LEDs for screen backlighting. LEDs are current-driven devices
whose brightness is proportional to the magnitude of forward current flow. Typical desired features for an
LED driver are direct control of current, high efficiency, PWM dimming, overvoltage protection, load
disconnect, small size, and ease of use.
LEDs for Instrument Cluster Backlights
High Power LEDs are defined as
individual components that are greater than 0.20 watts (Voltage, nominal * Current, nominal). High Power
LEDs have exploded in number over the last decade as new semiconductor technologies have allowed higher
power densities to be obtained.
High Power LEDs are generally smaller in package size and find applications where traditional lighting
sources will not fit. In addition, LEDs may consume lower power, provide longer lifetime, be more robust and
can be switched On/Off at very high rates of speed.
