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12-Channel high-brightness LED matrix manager for automotive headlight systems

TPS92662A-Q1

ACTIVE

Product details

Parameters

Topology Floating Switch Vin (Min) (V) 4.5 Vin (Max) (V) 60 Vout (Min) (V) 0 Vout (Max) (V) 62 Operating temperature range (C) -40 to 125 Features Fault Detection, Hybrid Dimming/Phase Shift, Integrated Switch, LED Open Detection, LED Shorted Detection, Precision Dimming Control, Synchronization Pin, Temperature Compensation open-in-new Find other Automotive LED drivers

Package | Pins | Size

HTQFP (PHP) 48 49 mm² 7 x 7 open-in-new Find other Automotive LED drivers

Features

  • AEC-Q100 qualified for automotive applications
    • Grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM classification level H1C
    • Device CDM classification level C5
  • Input voltage range: 4.5 V to 60 V
  • 12 Integrated bypass switches
  • Multi-drop UART communication interface
    • Compatible with TPS92662-Q1 and TPS92663-Q1 devices
    • Compatible with CAN physical layer
  • Eight-bit ADC with two MUXed inputs
  • Programmable crystal oscillator driver and clock buffer strength
    • Improved radiated and conducted EMI performance
  • External EEPROM I2C interface
  • Programmable 10-bit PWM dimming
  • LED open and short detection and protection
  • Supports multi-LMM synchronization for more than 12-LED string via time division multiplexing

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Description

The TPS92662A-Q1 LED matrix manager device enables fully dynamic adaptive lighting solutions by providing individual pixel-level LED control. The device includes four sub-strings of three series-connected integrated switches for bypassing individual LEDs. The individual sub-strings allow the device to accept either single or multiple current sources.

The TPS92662A-Q1 features a programmable Pierce crystal oscillator driver. Optimal performance is achieved by selecting the driver strength based on the quartz crystal or ceramic resonator manufacturers recommendations. The device also incorporates a selectable drive strength clock buffer. The rise and fall times and the EMI generated by clock signal is controlled by varying the drive strength of the clock buffer. When necessary, the clock buffer can be disabled to eliminate the noise generated by the clock signal and provide the lowest EMI performance.

The TPS92662A-Q1 supports the multi-drop universal asynchronous receiver transmitter (UART) serial interface and is compatible with TPS92662-Q1 and TPS92663-Q1 devices. The I2C communication interface can be used to read from and write to an external EEPROM that can store system calibration data.

An on-board 8-bit ADC with two multiplexed inputs can be used for system temperature compensation and used to measure a binning value which allows for LED binning and coding.

The internal charge pump rail supplies the gate drive voltage for the LED bypass switches. The low on-resistance (RDS(on)) of the bypass switch minimizes conduction loss and power dissipation.

The TPS92662A-Q1 and TPS92662-Q1 both incorporate identical register settings for programming phase shift and pulse width of each individual LED in the string and for reporting LED open and short circuit faults.

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Technical documentation

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Type Title Date
* Data sheet TPS92662A-Q1 High Brightness LED Matrix Manager with EMI Mitigation Techniques datasheet (Rev. A) Jan. 15, 2020
Application note Automotive Front Headlight Selection Guide Apr. 16, 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
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
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Technical article Solving the automotive EMI issues in new cars with all the screens Sep. 11, 2014

Design & development

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Hardware development

EVALUATION BOARD Download
499
Description
The TPS92662AEVM6-104 consists of 66 invidividually controllable LEDs configured into a six channel application. This evaluation module shows the versatility and configurability of the TPS92662A-Q1 LED Matrix Manager Device. Using the companion control PCB, 6CHAUTOECU-899, and the TPS92662AEVM (...)
Features
  • Individually controlled 66 pixel LED frontlight solution
  • 3x12 AFLS/ADB LED Array
  • 1x12 Sequential Turn Light
  • 1X12 Daytime Running Light
  • 1X6 High Power Race Light

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