Automotive Exterior


PT16978

PT16978 is three-channel LED driver includes a unique thermal management design to reduce temperature rising on the device. The device is a linear driver directly powered by automotive batteries with large voltage variations to output full current loads up to 150 mA per channel. It includes analog and PWM dimming control, independent PWM dimming for each channel.

External shunt resistors are leveraged to share output current and dissipate power out of the driver. The PT16978 also drives LED units and off-board brightness binning resistors to simplify the manufacturing process and lower whole system cost.

Its full-diagnostic capabilities include LED open, LED short-to-GND circuit and single LED short circuit detection.

The device is available in a HTSSOP20 package, and the operating junction temperature range is –40°C to 150°C.

FEATURES


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

● Input voltage range: 5 V–40 V

● Low supply current in fault mode

● Single resistor set for output current

 - Max. Current: 150 mA per Channel

 - Device Accuracy: ±4%

 - Max. Current: 450 mA in parallel operation mode

● Parallel outputs for higher current using multiple ICs or multiple channels of a single IC

● Low dropout voltage: 600mV@150mA per channel

● Independent PWM dimming per channel

● Thermal sharing by external shunt resistor

● Support off-board brightness binning resistor

● Support external NTC for current derating

● Open and Shorted LED Detection with Deglitch Timer

● Single LED short-circuit detection with auto recovery 

Fault bus configurable as either one-fails–all-fail or only-failed-channel off (N-1) Diagnostic enable with adjustable threshold

● Package Type- HTSSOP 20


APPLICATIONS


● Rear Combination Light (RCL)

● Position Light

● Turn Light

● Stop or Tail Light

● Fog Light

● General linear LED Light

資源下載

Documentation

TitleFileVersionDate
DatasheetPT16978.pdfV1.12024/12/1
EVB test reportPT16978 EVB test report_20240625.pdfREV1.02024/6/25
DEMOPT16978_DEMO_20231130.pdf  

Tools

Application Note