MAX25221
Automotive 4-Channel TFT-LCD Power Supplies with VCOM Buffer
Industry's First High Integrated Automotive 4-Ch TFT Bias with I2C and VCOM
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Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
Tools & Simulations
Software Development
Product Recommendations
MAX25221 Companion Parts
Recommended Related Parts
Design Resources
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.