The TLC5957 is a 48-channel constant current sink driver. Each channel has an
individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS) brightness
The output channels are divided into three groups, each group has a 512 step color
brightness control (CC), CC adjusts brightness between colors. The maximum current value of all 48
channels can be set by 8-step global brightness control (BC). BC adjusts brightness deviation
between LED drivers. GS, CC and BC data are accessible via a serial interface port.
TLC5957 has one error flag: LED open detection (LOD), which can be read via a serial
interface port. Each constant-current has a pre-charge field- effect transistor (FET), which can
remove ghosting and improve display performance on the multiplexing LED display. Besides, TLC5957
has an enhanced circuit, it can cancel the caterpillar effect caused by LED open.
TLC5957 has a poker data transmission mode; GS data length can be configured from 9 bit
to 16 bit according to PWM bits in each sub-segment. Poker Mode can significantly increase visual
refresh rate in multiplexing applications.
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