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MAX25221B

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Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer

Industry's First High Integrated Automotive 4-Ch TFT Bias with I2C and VCOM

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产品详情

请参见参数规范 Multifunction PMICs

主要特征

应用/用途

请参见参数规范 Multifunction PMICs
Parametric specs for Multifunction PMICs
VIN (V) (min) 2.65
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
# Inverting Outputs 1
VOUT (V) (min) -10.5
VOUT (V) (max) 10.5
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes) 		0
请参见参数规范 Multifunction PMICs
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简化框图

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参量

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.65
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
# Inverting Outputs 1
VOUT (V) (min) -10.5
VOUT (V) (max) 10.5
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes) 		0
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 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)/li>
    • Controlled Sequencing during Power-On and Power-Off of All Rails
    • VCOM Output Range +1V to -2.49V in 6.83mV Steps (MAX25221)
    • NTC Input for Temperature Measurement/Compensation (MAX25221)
  • 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
  • ​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 MAX25220/MAX25221/MAX25221B 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).

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

简化框图

MAX25221: Typical Application Circuit MAX25221: Typical Application Circuit Zoom icon

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 。