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MAX6975

24-Output PWM LED Drivers for Message Boards

Maxim Integrated 

24-Output PWM LED Drivers

for Message Boards

two external pnp transistors, such as FMMTL717, used

as common-anode power switches (see Figure 5).

Setting configuration bit D0 to 1 enables multiplex

operation. MUX0 and MUX1 alternate the LED anode

drive voltage between two sets of LEDs. The R, G, and

B ports provide individual PWM control during alternate

Figure 5. MAX6975 Multiplexing Two Sets of Eight RGB Pixels with a Single LED Supply and Subframe Timing

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