12-Channels Pre-programmable Constant Current LED Driver

Version:A.007

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DM621

Block Diagram

Figure 1. Functional Schematic of Whole Chip

The schematic of DM621 comprises of several fundamental units as shown in Figure1.

The grayscale data and command data, transferred according to the synchronous clock

DCK, are input into the SIN pin of DM621. Meanwhile, the combination of DCK and SIN

data could produce the control signal to switch these two modes and achieve the

auto-latch function. The Retiming block is advised to rearrange the timing of DCKO and

SOUT in order to realize the Auto-Latch function and improve the ability of long cascade.