10-Channel Constant Current LED Driver from PREMA Semiconductor

Each of the 10 LED driver outputs is a current sink for up to 10mA. The serial interface with latched input allows individual programming of each LED channel by an external microcontroller. The current variation between the LED channels does not exceed ±5% and thus a very uniform control of the LEDs is guaranteed. The LED current resp. the brightness for all LEDs is set by an external resistor. Additionally it can be varied through a PWM signal at the „blank“ input, which allows ON / OFF control for all channels independent of the serial interface. The PR4010 has been designed for supply voltages from 3V up to 5.5V.

Typical applications are driving dot matrix or LED segment displays. So may, for example, two PR4010 drive a 15x5 dot matrix display. 15 outputs of both PR4010 are used here as column drivers, the remaining five outputs work as row drivers together with five external PNP transistors in multiplexed operation.