Automotive Exterior


PT16974

PT16974 is a linear LED driver for automotive exterior lighting. It incorporates linear regulation and multiple logic control for use in Rear Combination 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 conditions. This is most useful for low power applications when no external FET is used.

A global enable function helps to active the device by external signal.

FEATURES


● Automotive AEC-Q100, Grade 1 (-40℃~+125℃) Qualified.

● Programmable LED current outputs for LED string

● LED current up to 800mA

● Single resistor set for the STOP current

● Single resistor set for the TAIL dimming

● Single resistor set for programming of the sequence interval

● Global enable control

● Various display sequencing

● Open LED string diagnostic with open−drain output in all modes

● Integrated 800Hz PWM dimming

● External PWM modulation input

● Low dropout operation for pre−regulator applications Overvoltage set back power limitation

● Programmable latch−off function on open string

● Over temperature protection

● Package Type- HSSOP24

APPLICATIONS


● Rear Combination Lamps (RCL)

● Turn Signal

● Center High Mounted Stop Lamps (CHMSL) Arrays

● Daytime Running Lights (DRL)

● Fog Lights

● Signature Lamp

資源下載

Documentation

TitleFileVersionDate
PT16974PT16974.pdfV1.32024/12/1
16ch DEMO Test ReportPT16974 16ch demo test report.pdfREV1.02019/7/25
16ch DEMOPT16974 16CH DEMO.pdf  

Tools

Application Note