• PREMA Semiconductor GmbH

10-Channel Constant Current LED Driver

The PR4010 drives up to 10 LEDs of any colour individually. For more LEDs several PR4010 can be cascaded and programmed via one serial interface. In this way it is possible to drive, for example 75 LEDs of a mulitplexed 15x5 dot matrix display with only two PR4010 and five additional transistors.

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 micro controller. The current variation between the LED channels does not exceed ±5% and thus a very uniform control of the LEDs is guaranteed. 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.