{"id":1039,"date":"2022-02-01T18:55:00","date_gmt":"2022-02-01T10:55:00","guid":{"rendered":"https:\/\/ecmos2.liho.work\/?p=1039"},"modified":"2024-09-10T14:37:05","modified_gmt":"2024-09-10T06:37:05","slug":"ec9232","status":"publish","type":"post","link":"https:\/\/www.ecmos.com.tw\/cn\/other\/ec9232\/","title":{"rendered":"EC9232\uff5cMulti-Channel TFT LCD Supply"},"content":{"rendered":"\n
\u898f\u683c\u66f8\u4e0b\u8f09<\/div><\/a>\n\n\n\n
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General Description<\/h3>\n\n\n\n

The EC9232 is an integrated power supply solution optimized for small to medium size thin-film transistor (TFT)
liquid crystal displays (LCD\u2019s).
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 4×4 mm VQFN green package.<\/p>\n\n\n\n

Features<\/h3>\n\n\n\n

\u25c6 2.5V to 5.5V input supply
\u25c6 Current-mode boost regulator
\uff0d 1.2MHz switching frequency
\uff0d Integrated 20V\/3.0A 160m\u2126 FET
\uff0d Fast transient response to pulsed load
\uff0d High efficiency up to 90%
\uff0d Adjustable high-accuracy output voltage(\u00b11%)
\uff0d Over current protection
\uff0d Over voltage protection
\u25c6 VGH positive charge pump controller
\u25c6 VGL negative charge pump controller
\u25c6 Integrated high performance operational amplifier
\uff0d \u00b1350mA output short-circuit current
\uff0d 40V\/us fast slew rate
\uff0d 20MHz Bandwidth
\uff0d rail-to-rail output
\u25c6 Low-voltage detection circuit
\u25c6 GPM controller
\uff0d Adjustable falling time
\uff0d Adjustable delay
\u25c6 Thermal shutdown
\u25c6 Thin 4×4 mm 24-lead VQFN package<\/p>\n\n\n\n

Applications<\/h3>\n\n\n\n

\u25c6 TFT LCD for Notebooks
\u25c6 TFT LCD for Monitors
\u25c6 Car Navigation Display
\u25c6 Portable equipment<\/p>\n\n\n\n

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