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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

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.6
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
VOUT (V) (min) -10
VOUT (V) (max) 12
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes)
3.71
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.6
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
VOUT (V) (min) -10
VOUT (V) (max) 12
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes)
3.71

Key Features

  • 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

Applications/Uses

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

Description

The MAX25222/MAX25222C are a 4-channel TFT-LCD power ICs that provide symmetrical positive AVDD and negative NAVDD supplies, as well as VGON and VGOFF gate supplies. In addition, a VCOM buffer with output voltage range above and below ground and a temperature measurement block are integrated.

The devices contain non-volatile memory so that the values of all outputs can be calibrated for the lifetime of the device (maximum five times).

Programming is carried out using the built-in I2C interface, which can also be used to read back diagnostic information. A stand-alone mode is available after the device has been programmed.

The temperature sensor interface block measures the temperature, optionally allowing the VCOM output voltage to be adjusted depending on the measured temperature. The MAX25222/MAX25222C2 includes extensive diagnostics to aid in fulfilling ASIL-B safety level.

The MAX25222/MAX25222C is available in a TQFN package and operate in the -40°C to 125°C temperature range.

Simplified Block Diagram

MAX25222: Typical Application Circuit MAX25222: TTypical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .