PT16974
DESCRIPTION
PT16974 is a linear LED driver for automotive exterior lighting. It incorporates linear regulation and multiple logic control for use in Rear bination Lamps. There are eight linear programmable constant current sources, so that provides various sequencing turn signals. PT16974 allows to set the STOP (DC value) and TAIL illumination (PWM duty cycle) via tow single resistors, the TAIL illumination can be controlled by external PWM input also. Sequencing functionality is activated, controlled, and programmed by individual pins. In addition to programming of the sequence interval, the device can sequence 8 individual output channels, 4 pairs of output channels, 2 quad output channels, or all 8 at once. An optional external ballast FET helps distribute the system power for high current application. Regulates the voltage at the top (anode) of the LED strings， to reduce the power dissipation of the device. Set back power limit reduces the drive current during overvoltage...
