EC9232数据手册E-CMOS中文资料规格书

描述 Description

The EC9232 is an integrated power supply solution optimized for small to medium size thin-film transistor (TFT) liquid crystal displays (LCD’s). The boost converter operates at the frequency of 1.2MHz. The integrated N channel FET has a typical current limit of 3.0A and can support output voltages up to 20V. The gate-on and gate-off charge pumps provide regulated TFT-LCD gate-on and gate-off supplies. Both outputs can be adjusted by external resistive voltage-dividers. The GPM is a flicker compensation circuit to reduce the coupling effect of gate lines; the gate-shaping timing is controlled by the timing-controller to modulate the Gate-On voltage, VGHM. It also can delay the Gate-On voltage during power-on to achieve a correct power-on sequence for gate driver ICs. Both the power-on delay time and the falling time of the Gate-On voltage are programmable by external capacitor and resistor. The integrated operational amplifier is typically used for LCD VCOM driving; the output can sink or source up to 350mA short-circuit current. This operational amplifier features fast slew rate (40V/us), wide bandwidth (20MHz), and rail-to-rail outputs as well. A built-in voltage detector generates a reset signal when the input voltage drops below a specified level. The reset signal is active low, and the detecting level is decided by an external resistor divider. The EC9232 is available in a thin 24-pin 4x4 mm VQFN green package.

特性 Features

◆  2.5V to 5.5V input supply
◆ Current-mode boost regulator
      - 1.2MHz switching frequency
      - Integrated 20V/3.0A 160mΩ FET
      - Fast transient response to pulsed load
      - High efficiency up to 90%
      - Adjustable high-accuracy output voltage(±1%)
      - Over current protection
      - Over voltage protection
◆ VGH positive charge pump controller
◆ VGL negative charge pump controller
◆ Integrated high performance operational amplifier
      - ±350mA output short-circuit current
      - 40V/us fast slew rate
      - 20MHz Bandwidth
      - rail-to-rail output
◆  Low-voltage detection circuit
◆  GPM controller
      - Adjustable falling time
      - Adjustable delay
◆ Thermal shutdown
◆ Thin 4x4 mm 24-lead VQFN package
 

应用 Application

◆ TFT LCD for Notebooks
◆ TFT LCD for Monitors
◆ Car Navigation Display
◆ Portable equipment