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

TPS929120-Q1

ACTIVE

Product details

Parameters

Topology Current Source Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125 Vin (Min) (V) 4.5 Vin (Max) (V) 40 Iout (Max) (A) 0.075 Iq (Typ) (mA) 10 Features Enable/Shutdown, Fault Detection, Fault Diagnostic, LED Open Detection, LED Shorted Detection, Precision Dimming Control, Thermal Shutdown 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

Features

  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • 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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Description

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
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Same functionality and pinout but is not an equivalent to the compared device:
NEW TPS929121-Q1 ACTIVE 12-channel automotive 40-V high-side LED driver with FlexWire interface Upgraded ADC range to 40 V.

Technical documentation

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Type Title Date
* Data sheet TPS929120-Q1 12-Channel Automotive 40-V High-Side LED Driver with FlexWire datasheet (Rev. B) Feb. 03, 2021
White paper Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White paper 簡化汽車及工業領域的功 能安全認證 Jun. 09, 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Application note TPS929120-Q1 Fault Handling Routing Apr. 17, 2020
Application note TPS929120-Q1 Pin Failure Modes and Effects Analysis (FMEA) Feb. 19, 2020
Functional safety information TPS929120-Q1 Functional Safety FIT Rate and Failure Mode Distribution Jan. 06, 2020
User guide TPS929120EVM User's Guide (Rev. B) Dec. 03, 2019
Technical article New LED drivers enhance your automotive lighting solutions Oct. 28, 2019
Technical article How semiconductor technologies are changing automotive lighting roadmaps Oct. 24, 2019
Application note LED Temperature Protection by Vf Monitoring May 29, 2019
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
Description
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 (...)
Features
  • 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

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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 (...)
Features
  • 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
  • (...)
CALCULATION TOOL Download
SLVRBF8.ZIP (79 KB)

Reference designs

REFERENCE DESIGNS Download
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

Package Pins Download
HTSSOP (PWP) 24 View options

Ordering & quality

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