MAX25221C
Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
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Industry's First High Integrated Automotive 4-Ch TFT Bias with I2C and VCOM
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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 (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
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The MAX25220/MAX25221/MAX25221B/MAX25221C are a 4-channel TFT-LCD power IC that provides 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 (MAX25221/B/C).
The device contains 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 also available.
The temperature sensor interface block measures the temperature optionally allowing the VCOM output voltage to be adjusted depending on the measured temperature.
The MAX25220/MAX25221/MAX25221B/MAX25221C are available in a TQFN package and operates in the -40°C to +125°C temperature range.
Applications
- Central Information Displays
- Infotainment Displays
- Instrument Clusters
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
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Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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MAX25221C
Documentation
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Documentation
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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| MAX25221CATJ/V+ |
32-LFCSP-5X5X0.75
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| MAX25221CATJ/V+T |
32-LFCSP-5X5X0.75
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- MAX25221CATJ/V+
- Pin/Package Drawing
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32-LFCSP-5X5X0.75
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- MAX25221CATJ/V+T
- Pin/Package Drawing
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32-LFCSP-5X5X0.75
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
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LCD/CCD/OLED Bias1 |
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PRODUCTION |
Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer |
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Multitopology DC/DC2 |
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PRODUCTION |
Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer |
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PRODUCTION |
Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features |
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Evaluation Kits 2
MAX25221EVSYS
Evaluation Kit for the MAX25220, MAX25221, MAX25221B, MAX25221C
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 Detail
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
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 Detail
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
Resources
Tools & Simulations 1
Software Development 2
