The DD231 is a 3-channel constant current LED driver. It’s designed to operate as a constant-current sink to drive the LEDs with an external resistance in low power environment. Because the DD231 directly determines output current by each channel in low Bit-to-Bit skew, it is ideal for driving LED whose light intensity is proportional to the current passing through them, not the voltage across their terminals.
This configuration eliminates the need of external capacitors and inductances. With an input voltage range of 3V to 5V, so the device can work in general battery system. The value of constant current can be varied using an external resistor (Iout = 5 ~30mA).
GENERAL FEATURES
˙Constant Current Output, 5~30mA.
˙Supply Voltage VDD is 3V to 5V.
˙Bit-to-Bit : ± 3.0% (Max) @ IOUT = 5 ~ 30mA.
˙Only Need One External Resistor, No Other External Parts.
˙Small 6-Pin SOT26 Package.
APPLICATIONS
˙White LED Display Backlighting
˙Cellular Telephones
˙Handheld Computers
˙Digital Cameras
˙Portable MP3 Players
˙Pagers
˙Personal Digital Assistant
˙E-Books and Sub Notebooks