16通道， 12位PWM LED驱动器， 6位点校正和预充电FET 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET
The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated PWM steps and 64 constant sink current dot correction steps. The dot correction DC adjusts for brightness variations between LEDs. Both grayscale GS control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.
The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection LOD, a thermal error flag TEF, and a pre-thermal warning PTW. The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown TSD protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set.