Maxim MAX16929汽车TFT-LCD电源解决方案

Maxim 公司的MAX16929是用于汽车TFT-LCD的高度集成电源器件,它集成了一个降压转换器,一个升压转换器,一个1.8V/3.3V稳压控制器和两个栅极电压稳压器.工作电压4V-28V(降压)或3V-5.5V(升压),高达6W的升压输出达18V,高频开关工作:2.1MHz (降压转换器),2.2MHz (升压转换器),主要用在汽车仪表盘,汽车导航系统和汽车中心信息显示器.本文介绍了MAX16929主要特性,方框图, 典型应用电路图和MAX16929评估板主要特性,电路图和材料清单.
The MAX16929 is a highly integrated power supply for automotive TFT-LCD applications. The device integrates one buck converter, one boost converter, one 1.8V/3.3V regulator controller, and two gate voltage regulators. The device comes in several versions to satisfy com­mon automotive power-supply requirements.
Designed to operate from a single 4V to 28V supply or 5.5V to 28V supply, the device is ideal for automotive TFT-LCD applications.
Both the buck and boost converters use spread-spec­trum modulation to reduce peak interference and to opti­mize EMI performance.
The sequencing input (SEQ) allows flexible sequencing of the positive-gate and negative-gate voltage regulators. The power-good indicator (PGOOD) indicates a failure on any of the converters or regulator outputs. Integrated thermal shutdown circuitry protects the device from over­heating.
The MAX16929 is available in a 28-pin TSSOP pack­age with exposed pad, and operates over the -40NC to +105NC temperature range.
MAX16929主要特性:
Operating Voltage Range of 4V to 28V (Buck) or 3V to 5.5V (Boost)
Independent 28V Input Buck Converter Powers TFT Bias Supply Circuitry and External Circuitry
High-Power (Up to 6W) Boost Output Providing Up to 18V
1.8V or 3.3V Regulator Provides 500mA with External npn Transistor
One Positive-Gate Voltage Regulator Capable of Delivering 20mA at 28V
One Negative-Gate Voltage Regulator
High-Frequency Operation 2.1MHz (Buck Converter) 2.2MHz (Boost Converter)
Flexible Stand-Alone Sequencing
True ShutdownT...