Prema PR4010 10路LED驱动方案
10-Channel LED Driver PR4010
The PR4010 is a 10 channel constant current driver with serial interface for LED display
applications. 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.
PR4010主要特性:
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
应用:
LED status displays
Bargraph displays
Indicator signs
Instrument displays
LED matrix text displays
图1.PR4010方框图
图2.PR4010典型应用电路
图3.PR4010在点阵显示器中应用电路
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.
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