Datasheet > EC9232NNQ1R

EC9232NNQ1R

更新时间： 2022-02-26 12:50:53

品牌	Logo	应用领域
飞虹 - E-CMOS		/
页数	文件大小	规格书
14页	314K
描述
Multi-Channel TFT LCD Supply

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EC9232NNQ1R 数据手册

EC9232

Multi-Channel TFT LCD Supply

General 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.

Features

QFN-24 Pin Configuration

◆ 2.5V to 5.5V input supply

◆ Current-mode boost regulator

- 1.2MHz switching frequency

- Integrated 20V/3.0A 160mꢀ 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

Applications

◆ TFT LCD for Notebooks

◆ TFT LCD for Monitors

◆ Car Navigation Display

◆ Portable equipment

E-CMOS Corp. (www.ecmos.com.tw)

5E26N-Rev. F001

1/14

12 3 4 5 6 7...14

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