MAX25222

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

产品详情

General Description

The MAX25222 is a 4-channel TFT-LCD power IC that provides symmetrical positive AVDD and negative NAVDD supplies as well as VG_ON and VG_OFF gate supplies. In addition, a VCOM buffer with output voltage range above and below ground and a temperature measurement block are integrated.

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 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 includes extensive diagnostics to aid in fulfilling ASIL-B safety level.

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

Simplified Block Diagram

Enlarge+ Enlarge+

Benefits and 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 VG_ON Output (7.6V to 20.2V) from 3x Regulated Charge Pump
- VG_OFF (-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 diagnostics 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, VG_ON, VG_OFF, VCOM, and Sequencing
- Supports Stand-Alone Operation Mode after Programming
- Compact 5mm x 5mm TQFN32 Package
AECQ100 Grade 1

Applications

Infotainment Displays
Central Information Displays
Instrument Clusters

19-100888; Rev 0; 9/20

请参见参数规范 Multifunction PMICs

主要特征

请参见参数规范 Multifunction PMICs

Parametric specs for Multifunction PMICs

V_IN (V) (min)	2.6
V_IN (V) (max)	5.5
# Step-Down Outputs	2
# Step-Up Outputs	2
V_OUT (V) (min)	-10
V_OUT (V) (max)	12
Package/Pins	TQFN-CU/32
Budgetary Price (See Notes)	3.71

请参见参数规范 Multifunction PMICs

缩小

简化框图

您可能感兴趣的类似产品

在功能和参数上与被比较产品完全相同

器件号	说明
MAX25221	Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer
MAX25220	Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer

Technical Docs

	数据资料	Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features	Oct 07, 2020
	solution	TFT-Bias for Automotive Applications

设计与质量

单击下面的标题以查看详情页面

硬件开发

评估板

MAX25222EVKIT

$63.60

描述

The MAX25222 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB used to evaluate MAX25222 automotive 4-channel TFT-LCD power supply with VCOM Buffer. Each output rail (AVDD, NAVDD, VGON, VGOFF, and VCOM) can be independently adjusted through I²C. The EV kit demonstrates the device’s features: adjustable output voltage, fault protection, VCOM temperature compensation, nonvolatile memory programming, and extensive diagnostics to aid in fulfilling ASIL-B safety level.

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 exer- cising the features of the IC. The EV system includes both the EV kit and the MINIQUSB+ adapter board.

查看详情

特征

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)
Selectable Switching Frequency (2.1MHz or 420kHz) with Spread-Spectrum Option. The EV Kit Components are Fit the 2.1MHz Frequency. Using 420kHz Requires a Hardware Change. Evaluates: MAX25222
Dedicated GUI
Full Sequencing Flexibility
Proven PCB Layout
Fully Assembled and Tested

评估板

MAX25222EVSYS

$142.04

描述

查看详情

特征

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)
Selectable Switching Frequency (2.1MHz or 420kHz) with Spread-Spectrum Option. The EV Kit Components are Fit the 2.1MHz Frequency. Using 420kHz Requires a Hardware Change. Evaluates: MAX25222
Dedicated GUI
Full Sequencing Flexibility
Proven PCB Layout
Fully Assembled and Tested

评估板

MAX25222EVKIT

数据资料

$63.60

描述

查看详情

特征

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)
Selectable Switching Frequency (2.1MHz or 420kHz) with Spread-Spectrum Option. The EV Kit Components are Fit the 2.1MHz Frequency. Using 420kHz Requires a Hardware Change. Evaluates: MAX25222
Dedicated GUI
Full Sequencing Flexibility
Proven PCB Layout
Fully Assembled and Tested

评估板

MAX25222EVSYS

数据资料

$142.04

描述

查看详情

特征

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)
Selectable Switching Frequency (2.1MHz or 420kHz) with Spread-Spectrum Option. The EV Kit Components are Fit the 2.1MHz Frequency. Using 420kHz Requires a Hardware Change. Evaluates: MAX25222
Dedicated GUI
Full Sequencing Flexibility
Proven PCB Layout
Fully Assembled and Tested

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题，请访问Maxim的支持中心。

参量

Parametric specs for Multifunction PMICs

V_IN (V) (min)	2.6
V_IN (V) (max)	5.5
# Step-Down Outputs	2
# Step-Up Outputs	2
V_OUT (V) (min)	-10
V_OUT (V) (max)	12
Package/Pins	TQFN-CU/32
Budgetary Price (See Notes)	3.71

See parametric specs for Multifunction PMICs

主要特征

High Integration
- Synchronous Boost Provides AVDD of 4.2V to 10.5V at up to 200mA
- NAVDD Inverter Output at up to -200mA
- 15mA VG_ON Output (7.6V to 20.2V) from 3x Regulated Charge Pump
- VG_OFF (-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 diagnostics 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, VG_ON, VG_OFF, VCOM, and Sequencing
- Supports Stand-Alone Operation Mode after Programming
- Compact 5mm x 5mm TQFN32 Package
AECQ100 Grade 1

应用/用途

中央信息显示屏
信息娱乐系统显示屏
仪表盘

描述

The MAX25222 is a 4-channel TFT-LCD power IC that provides symmetrical positive AVDD and negative NAVDD supplies, as well as VG_ON and VG_OFF gate supplies. In addition, a VCOM buffer with output voltage range above and below ground and a temperature measurement block are integrated.

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 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 includes extensive diagnostics to aid in fulfilling ASIL-B safety level.

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

简化框图

MAX25222: Typical Application Circuit

Technical Docs

	数据资料	Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features	Oct 07, 2020
	solution	TFT-Bias for Automotive Applications

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题，请访问Maxim的支持中心。

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INTERACTIVE Data Sheet

MAX25222

Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer and ASIL B Features

产品详情

主要特征

应用/用途

简化框图

您可能感兴趣的类似产品

Technical Docs

设计与质量

支持和培训

参量

主要特征

应用/用途

描述

简化框图

Technical Docs

支持和培训

MAX25222 相关视频