Prema PR4010 LED Driver Solution

Prema's PR4010 is a 10-channel LED constant current driver that can be used for single-row LED and dot-matrix LED display drivers.

The PR4010 operates at 5V, a serial interface that controls the brightness of the LED from the outside and can be used for LED status displays, bar graph displays, symbol indicators, instrument displays and LED dot matrix text displays. This article describes the main features of the PR4010. Block diagram, typical application circuit and application circuit in dot matrix display.

10-Channel LED Driver PR4010
The PR4010 is a 10 channel constant current driver with serial interface for LED displayapplications. The LED current is programmable via an external resistor.
It can be used for single lines of LED, as well as for matrix displays.
The device is available in a 20-pin SSOP package.

Main features of PR4010:
10 constant current sink channels
Supply voltage 5V
Serial interface, shift register with latch
External brightness control
Current output with max. sink current of 10mA

application:
LED status displays
Bargraph displays
Indicator signs
Instrument displays
LED matrix text displays

Figure 1. Block diagram of PR4010

Figure 2. PR4010 Typical Application Circuit

Figure 3. PR4010 application circuit in a dot matrix display

In this example, five outputs are used to select one line via an external PNP transistor.

Two PR4010 are cascaded to provide a total of 20 drivers. When multiplexing the control signals more than 75 LEDs in the display matrix can be operated.