Four Channel Constant Current LED Driver
EC4101
FEATURES
Cost Effective LED driver
Constant current output ideal for Driving Led
strings
Four Channel LED Driver provides matched LED
current
Current adjusted via an external resistor
PWM dimming possible by using either the
ENABLE
Small SOP-8 package
Outputs can be connected in parallel to increase
drive
Constant current for wide cathode voltage range
(4.5V to 18V)
Highly integrated design, minimal components
Thermal shutdown protects the driver
Package type SOP-8
APPLICATIONS
Next Generation Mobile Phones
PDA, DSC, MP3 Players
Handheld Computers
LCD Display Modules
Keyboard Backlight
LED Displays
DESCRIPTION
The EC4101 is a linear constant current driver designed to drive multiple LEDs in series
from a high input voltage rail. The driver acts as a high current matched four channel
current source ensuring constant LED current for a range of input voltage. The EC4101
allows implementing the lowest cost LED driver for a variety of applications. Internal
circuitry maintains the pre-set constant current output for a wide voltage range at the
LED outputs (LED1,2,3,4). LED current can be adjusted up to 125mA per string with an
external resistor. The dimming can be achieved by controlling the ISET input or by
feeding a PWM signal to the EN pin. Fast EN turn-on and turn-off time allows for very
fast PWM dimming frequencies completely eliminating flickering. The built-in thermal
protection automatically adjusts LED current to prevent overheating.
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DR18EC070105-VER1.0
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