16-Output PWM LED Drivers
for Message Boards
Multiplexed vs. Nonmultiplexed Operation
The MAX6972/MAX6973 can double the number of
LEDs driven from 16 to 32 through multiplexing. When
multiplexing, the two outputs, MUX0 and MUX1, drive
two external pnp transistors, such as FMMTL717, used
as common-anode power switches (see Figure 5).
Figure 5. MAX6973 Multiplexing Two Sets of Eight RG Pixels with a Single LED Supply and Subframe Timing
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