MAX25222C

PRODUCTION

Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features

Industry's First ASIL B High Integrated Automotive 4-Ch TFT Bias with I2C and VCOM

Data Sheet (Rev. 1)
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Overview

  • High Integration
    • Synchronous Boost Provides AVDD of 4.2V to 10.5V at up to 200mA
    • NAVDD Inverter Output at up to -200mA
    • 15mA VGON Output (7.6V to 20.2V) from 3x Regulated Charge Pump
    • VGOFF (-18.2V to -5.6V) from Regulated Charge Pump at up to -15mA (Charge-Pump Doubler)
    • Controlled Sequencing during Power-On and Power-Off of All Rails
    • VCOM Output Range +1V to -2.49V in 6.83mV Steps
    • NTC Input for Temperature Measurement/Compensation
  • Low EMI
    • 420kHz/2.1MHz Switching Frequency with Spread Spectrum
  • I2C Control/Diagnostic Interface with FLTB (Interrupt) Output
    • UV Diagnostics on All Outputs
    • OV Dagnostics on All Outputs
    • Bandgap Reference Out of Range
    • Stuck FLTB Pin
    • Communication Parity Check
    • VCOM DAC Fault
  • Versatile
    • Non-Volatile Output Voltage Settings on AVDD/NAVDD, VGON, VGOFF, VCOM, and Sequencing
    • Supports Stand-Alone Operation Mode after Programming
    • Compact 5mm x 5mm TQFN32 Package
  • ​AEC-Q100 Grade 1
MAX25222C
Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features
MAX25222: TTypical Application Circuit
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Documentation

Data Sheet 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX25220
PRODUCTION Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
MAX25221
PRODUCTION Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
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Tools & Simulations

Software Development 2

IBIS Model 1

Evaluation Kits

MAX25222EVSYS

Evaluation Kit for the MAX25222/MAX25222C

Buy Now View Details

Features and Benefits

  • 2.65V to 5.5V Input Range
  • Default Output Voltages
    • 6.8V Output at 200mA (Boost Converter)
    • -6.8V Output at -200mA (Inverting Regulator)
    • 12V Output at 15mA (Positive-Charge Pump Regulator)
    • -10V Output at 15mA (Negative-Charge Pump Regulator)
    • -2.49V Output at 100mA (VCOM Buffer)
  • The EV kit components will fit the 2.1MHz frequency. For using 420kHz, HW changes are needed.
  • Spread Spectrum
  • Dedicated GUI
  • Full Sequencing Flexibility
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX25222 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB used to evaluate MAX25222/MAX25222C automotive 4-channel TFT-LCD power supply with VCOM Buffer. Each output rail (AVDD, NAVDD, VGON, VGOFF, and VCOM) can be independently adjusted through I2C. The EV kit demonstrates the device’s features: adjustable output voltage, fault protection, VCOM temperature compensation, nonvolatile memory programming, and extensive diagnostics to aid in fulfilling ASIL-B safety level.

The EV kit exposes an I2C interface which can operate in conjunction with the MINIQUSB+ adapter or a third party I2C master like a general-purpose microcontroller. The EV kit also includes Windows®-compatible software that provides a simple graphical user interface (GUI) for exer- cising the features of the IC. The EV system includes both the EV kit and the MINIQUSB+ adapter board.

Applications

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

MAX25222EVKIT

Evaluation Kit for the MAX25222/MAX25222C

Buy Now View Details

Features and Benefits

  • 2.65V to 5.5V Input Range
  • Default Output Voltages
    • 6.8V Output at 200mA (Boost Converter)
    • -6.8V Output at -200mA (Inverting Regulator)
    • 12V Output at 15mA (Positive-Charge Pump Regulator)
    • -10V Output at 15mA (Negative-Charge Pump Regulator)
    • -2.49V Output at 100mA (VCOM Buffer)
  • The EV kit components will fit the 2.1MHz frequency. For using 420kHz, HW changes are needed.
  • Spread Spectrum
  • Dedicated GUI
  • Full Sequencing Flexibility
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX25222 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB used to evaluate MAX25222/MAX25222C automotive 4-channel TFT-LCD power supply with VCOM Buffer. Each output rail (AVDD, NAVDD, VGON, VGOFF, and VCOM) can be independently adjusted through I2C. The EV kit demonstrates the device’s features: adjustable output voltage, fault protection, VCOM temperature compensation, nonvolatile memory programming, and extensive diagnostics to aid in fulfilling ASIL-B safety level.

The EV kit exposes an I2C interface which can operate in conjunction with the MINIQUSB+ adapter or a third party I2C master like a general-purpose microcontroller. The EV kit also includes Windows®-compatible software that provides a simple graphical user interface (GUI) for exer- cising the features of the IC. The EV system includes both the EV kit and the MINIQUSB+ adapter board.

Applications

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters
MAX25222EVSYS
Evaluation Kit for the MAX25222/MAX25222C
MAX25222EVKIT
Evaluation Kit for the MAX25222/MAX25222C

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