MAX25222ATJ/V+ Analog Devices

Click here to ask an associate for production status of specific part numbers. MAX25222/MAX25222C Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features General Description Benefits and Features The MAX25222/MAX25222C are 4-channel TFT-LCD High Integration power ICs that provide symmetrical positive AVDD and Synchronous Boost Provides AVDD of 4.2V to negative NAVDD supplies as well as VG and VG 10.5V at up to 200mA ON OFF gate supplies. In addition, a VCOM buffer with output volt- NAVDD Inverter Output at up to -200mA age range above and below ground and a temperature 15mA VG Output (7.6V to 20.2V) from 3x ON measurement block are integrated. Regulated Charge Pump VG (-18.2V to -5.6V) from Regulated Charge OFF These devices contain non-volatile memory so that the Pump at up to -15mA (Charge-Pump Doubler) values of all outputs can be calibrated for the lifetime of Controlled Sequencing during Power-On and the device (maximum five times). Power-Off of All Rails 2 Programming is carried out using the built-in I C interface, VCOM Output Range +1V to -2.49V in 6.83mV which can also be used to read back diagnostic informa- Steps tion. A stand-alone mode is available after the device has NTC Input for Temperature Measurement/ been programmed. Compensation The temperature sensor interface block measures the Low EMI temperature optionally allowing the VCOM output voltage 420kHz/2.1MHz Switching Frequency with Spread to be adjusted depending on the measured temperature. Spectrum The MAX25222/MAX25222C include extensive diagnos- 2 I C Control/Diagnostic Interface with FLTB (Interrupt) tics to aid in fulfilling the ASIL B safety level. Output The MAX25222/MAX25222C are available in a TQFN UV Diagnostics on All Outputs package and operate in the -40C to 125C temperature OV Diagnostics on All Outputs range. Bandgap Reference Out of Range Stuck FLTB Pin Applications Communication Parity Check Infotainment Displays VCOM DAC Fault Central Information Displays Versatile Instrument Clusters Non-Volatile Output Voltage Settings on AVDD/ NAVDD, VG , VG , VCOM, and Sequencing ON OFF Supports Stand-Alone Operation Mode after Programming Compact 5mm x 5mm TQFN32 Package AEC-Q100 Grade 1 Ordering Information appears at end of data sheet. 19-100888 Rev 1 10/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX25222/MAX25222C Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features Simplified Block Diagram RREF TEMP V18 IN REG IN DAC NTC VCOM 8b ADC FOR TEMP VCOMN BST NAVDD COMPENSATION NEG. VCB REGULATOR TFT BOOST REF1 CONTROL PGVDD HVINP 420kHz/2.1MHz LXP FC2+ FC2- PGND POSITIVE CHARGE PUMP FC1+ REF2 0.9V FC1- HVINP VCOM VGON DIAGNOSTICS V18 TEMP WARNING, SHUTDOWN POSITIVE AVDD SOFT-START VGOFF AND DISCHARGE NEGATIVE ENABLE, CONTROL NEGATIVE CHARGE PUMP AND FAULT LOGIC SOFT-START DN AND NAVDD DISCHARGE CPGND INVERTING REGULATOR EN PROGRAMMING INN 420kHz/2.1MHz FLTB LOGIC & DGND 2 I C NV MEMORY LXN MAX25222/CMAX25222/C GND ADD SCL SDA VPROG www.analog.com Analog Devices 2