MAX25220

PRODUCTION

Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer

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

Data Sheet (Rev. 6)
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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 (MAX25221/B/C)
    • NTC Input for Temperature Measurement/Compensation (MAX25221/B/C)
  • Low EMI
    • 420kHz/2.1MHz Switching Frequency with Spread Spectrum
  • I2C Control/Diagnostic Interface with FLTB (Interrupt) Output
    • UV Diagnostics on All Outputs
  • 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
MAX25220
Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
MAX25221: Typical Application Circuit
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Documentation

Data Sheet 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX25221B
PRODUCTION Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
MAX25222
PRODUCTION Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features
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Tools & Simulations

Software Development 2

Evaluation Kits

MAX25221EVSYS

Evaluation Kit for the MAX25220, MAX25221, MAX25221B, MAX25221C

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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 Fit the 2.1MHz Frequency; for Using 420kHz, Hardware Changes Are Needed
  • Spread Spectrum
  • Dedicated GUI
  • Full Sequencing Flexibility
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX25221 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB used to evaluate MAX25221 and MAX25221B automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer or the MAX25220 automotive 4-Channel TFT-LCD Power Supply without VCOM. Each output rail (AVDD, NAVDD, VGON, VGOFF and VCOM) can be independently adjusted via I2C. The EV kit demonstrates the device’s features: adjustable output voltage, fault protection, VCOM temperature compensation, and non-volatile memory programming. 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 exercising 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

MAX25221EVKIT

Evaluation Kit for the MAX25220, MAX25221, MAX25221B, MAX25221C

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 Fit the 2.1MHz Frequency; for Using 420kHz, Hardware Changes Are Needed
  • Spread Spectrum
  • Dedicated GUI
  • Full Sequencing Flexibility
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX25221 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB used to evaluate MAX25221 and MAX25221B automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer or the MAX25220 automotive 4-Channel TFT-LCD Power Supply without VCOM. Each output rail (AVDD, NAVDD, VGON, VGOFF and VCOM) can be independently adjusted via I2C. The EV kit demonstrates the device’s features: adjustable output voltage, fault protection, VCOM temperature compensation, and non-volatile memory programming. 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 exercising 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
MAX25221EVSYS
Evaluation Kit for the MAX25220, MAX25221, MAX25221B, MAX25221C
MAX25221EVKIT
Evaluation Kit for the MAX25220, MAX25221, MAX25221B, MAX25221C

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