Common cathode constant current led driver

 · Now the only LED driver chip that works for common cathode that i could find is this one: UDN (it is my first post so i can't post a link apparently, but if you google that you will find the datasheet as the first result.) The chip works fantastic except for one small problem. STP04CM05 - 4-bit LED array driver AN 6/54 Doc ID Rev 1 1 STP04CM05 - 4-bit LED array driver Main features Four constant current output channels Adjustable output current from 80 mA to mA through an external resistor 20 V current generators rated voltage Supply voltage from V to V. Figure 2.  · Constant current driving RGB LEDs with common cathode/anode «on: Febru, am» Hey all, I'm trying to layout a board for LED light that will consist of alternating rows of red, green and blue LEDs.

Figure 1. A 'common cathode' means that the cathode connections of LEDs are tied together, as shown in Figure 2. For common anode RGB LEDs, a current-sink LED driver must be used. For common cathode RGB LEDs, a current source LED driver is necessary. In general, common anode LEDs are more popular. STP04CM05 - 4-bit LED array driver AN 6/54 Doc ID Rev 1 1 STP04CM05 - 4-bit LED array driver Main features Four constant current output channels Adjustable output current from 80 mA to mA through an external resistor 20 V current generators rated voltage Supply voltage from V to V. Figure 2. Adjustable Constant Current Regulator LED Driver 50 V, − mA 10%, W Package The adjustable constant current regulator (CCR) is a simple, economical and robust device designed to provide a cost effective solution for regulating current in LEDs. The CCR is based on Self-Biased Transistor (SBT) technology and regulates current over a.

Our linear constant current LED drivers are a simple and robust solution to drive low- and medium-power LEDs up to mA – making up the vast majority of. 5 Sept I use the TLC as my LED driver, and LEDs that are common cathode. the 80mA constant current sources shown are my TLC outputs). The LED's anode connects to VCC and the cathodes are each connected to an output pin of the current-sinking LED driver chip. The driver chip sinks the DC.