12-channel automotive 40V highside LED driver with flexwire interface



Product details


Topology Current Source Channels (#) 12 Vin (Min) (V) 4.5 Vin (Max) (V) 40 Iout (Max) (A) 0.075 Iq (Typ) (mA) 10 LED current per channel (mA) 75 Operating temperature range (C) -40 to 125 Features Enable/Shutdown, Fault Detection, Fault Diagnostic, LED Open Detection, LED Shorted Detection, Precision Dimming Control, Thermal Shutdown Applications Daytime Running, Dome, Fog, Headlamp, LCD Backlight, Position, Stop/Tail, Tell-Tale, Turn Rating Automotive open-in-new Find other Automotive LED drivers

Package | Pins | Size

HTSSOP (PWP) 24 34 mm² 7.7 x 4.4 open-in-new Find other Automotive LED drivers


  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • 12-Channel precision high-side current output:
    • Supply voltage 4.5 V to 40 V
    • Up to 75 mA channel current set by resistor
    • 2-Bit global, 6-bit independent current setting
    • High current accuracy < ±5% at 5 mA to 75 mA
    • High current accuracy < ±10% at 1 mA
    • Low voltage drop 500 mV at 50 mA
    • 12-Bit independent PWM dimming
    • Programmable PWM frequency up to 20 kHz
    • Linear and exponential dimming method
  • FlexWire control interface
    • Up to 1-MHz clock frequency
    • Maximum 16 devices on one FlexWire bus
    • Up to 8 bytes data transaction in one frame
    • 5-V LDO output to supply CAN transceiver
  • Diagnostic and protection:
    • Programmable fail-safe state
    • LED open-circuit detection
    • LED short-circuit detection
    • Single-LED short-circuit diagnostic
    • Programmable low-supply detection
    • Open-drain ERR for fault indication
    • Watchdog and CRC for FlexWire interface
    • 8-Bit ADC for pin voltage measurement
    • Overtemperature protection

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open-in-new Find other Automotive LED drivers


With increasing demand for animation in automotive lighting, LEDs must be controlled independently. Therefore, LED drivers with digital interfaces are essential to effectively drive pixel-controlled lighting applications. In exterior lighting, multiple lamp functions are typically located on different PCB boards with off-board wires connected to each other. It is difficult for a traditional single-ended interface to meet the strict EMC requirements. By using an industrial-standard CAN physical layer, the UART-based FlexWire interface of the TPS929120-Q1 easily accomplishes long distance off-board communication without impacting EMC.

The TPS929120-Q1 is a 12-channel, 40-V high-side LED driver that controls the 8-bit output current and 12-bit PWM duty cycles. The device meets multiple regulation requirements with LED open-circuit, short-to-ground, and single LED short-circuit diagnostics. A configurable watchdog also automatically sets fail-safe states when the MCU connection is lost, and, with programmable EEPROM, TPS929120-Q1 can flexibly be set for different application scenarios.

open-in-new Find other Automotive LED drivers

Technical documentation

Design & development

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Hardware development

document-generic User guide
The TPS929120-Q1 evaluation module (EVM) helps designers evaluate the operation and performance of TPS929120-Q1, a 12-channel 40-V highside LED driver with FlexLED interface to individually control output current and PWM dutycycle for automotive lighting applications. It also has LED open-circuit (...)
  • 12 channel individual programmable precision highside constant current output
  • Up to 1MHz clock frequency FlexLED serial interface
  • Progarmmable fail-safe mechanism with EEPROM
  • LED open-circuit, short-circuit and single-led short circuit diagnostic with built-in Auto-ADC

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Digital interface LED driving module reference design for automotive rear light
TIDA-020029 — This reference design offers a cost-effective solution for automotive rear-light applications such as interactive tail-light clusters that can be used for vehicle-to-vehicle notifications and vehicle design personalization. This reference design incorporates two linear LED drivers. By using a (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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