具有预充电 FET、LOD Caterpillar 且支持 16 路多路复用的 48 通道 16 位 ESPWM LED 驱动器 56-QFN -40 to 85
The TLC59581/82are 48-channel constant-current sink drivers. Each channel has an individually-adjustable, 65536-step, pulse width modulation PWM grayscale GS brightness control.
The TLC59581 can support 32-multiplexing while TLC59582 can support 16-multiplexing.
The output channels are divided into three groups. Each group has a 512-step color brightness control CC. CC adjusts brightness control 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 through a serial interface port.
See application note _Build High Density, High Refresh Rate, Multiplexing LED Panel with TLC59581_, SLVA744.
The TLC59581/82 device has one error flag: the LED open detection LOD, which can be read through a serial interface port. To resolve this caterpillar issue caused by an open LED, the TLC59581/82 device has an enhanced circuit for caterpillar canceling, thermal shut down TSD and IREF resistor short protection ISP, which ensures a higher system reliability. The TLC59581/82 device also has a power-save mode that sets the total current consumption to 0.8 mA typical when all outputs are off. The TLC59581/82 device is a good solution to improve display performance of a multiplexing panel for low-grayscale patterns.
