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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.
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
技术文档
| 数据资料 | Automotive 4-Channel TFT-LCD Power Supply with VCOM buffer | Feb 03, 2021 |
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描述
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.
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)
- 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
描述
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.
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)
- 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
参量
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.
技术文档
| 数据资料 | Automotive 4-Channel TFT-LCD Power Supply with VCOM buffer | Feb 03, 2021 |
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