The ANX6862 is an fully I2C programmable integrated power supply solution optimized for large thin-film transistor (TFT) liquid crystal display (LCD) TV panels which generates all voltage rails for the TFT LCD bias (AVDD, VGH, VGL) and also 3 buck regulators for VIO, VCORE, and VHAVDD supplies. It is especially designed for 12V input. For better display quality control, the device also provides Gate-Pulse-Modulation block and temperature compensation for VGH voltage.
The boost regulator provides TFT source driver AVDD voltage. The integrated N-channel FET operates at a fixed frequency of 750kHz which has a current limit up to 5A and can be adjusted from 13.5V to 19.8V.
The 3 buck regulators supply system logic power, core volrage power and the half AVDD power for driver IC. Both boost and buck regulators feature internal soft-start function to limit inrush current and use the current mode control to perform fast load transient response.
The gate-on and gate-off charge pumps provide TFT-LCD gate drivers regulated gate-on and gate-off supplies. The temperature compensation circuit for gate-on voltage is applied. The internal soft-start function is also included.
The reset function pullsthe reset signal down when detect the input voltage lower than 8.9V.
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.
The ANX6862 is available in a thin 40-pin 6x6 mm WQFN green package.
l 8V to 14V input supply
l 6 bit current-mode boost regulator for VAVDD
- 13.5V to 19.8V programmable output voltage
- High voltage stress mode
- 750KHz fixed switching frequency
- Programmable current limit up to 5A
- Fast transient response to pulsed load
- Integrated isolation switch
- Programmable soft-start time
- Over voltage protection
l 4 bit current-mode buck regulator for VIO
- 2.2V to 3.7V programmable output voltage
- 750KHz fixed switching frequency
- Fast transient response
- Programmable current limit up to 3A
l 5 bit synchronous buck regulator for VCORE
- 0.8V to 3.3V programmable output voltage
- 2MHz fixed switching frequency
- Fast transient response
- Programmable current limit up to 2.5A
l 6 bit synchronous buck regulator for VHAVDD
- 4.8V to 11.1V programmable output voltage
- 750KHz fixed switching frequency
- Fast transient response
- Programmable current limit up to 1.7A
l 4 bit positive charge pump controller for VGH
- 20V to 35V programmable output voltage
Temperature compensation offset up to 15V
l 4 bit negative charge pump controller for VGL
-5.5V to -14.5V programmable output voltage
l 2 bit GPM controller
- 0V to 15V programmable stop voltage
l Programmable sequence
l I2C compatible interface
l Thermal shutdown
l Thin 6x6 mm 40-lead WQFN package
PIN CONFIGURATION
| Title | Last update | Share | Viewing times |
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ORDERING INFORMATION
| Part Number | Package |
|---|---|
ANX6862AAQ | WQFN-40L, 6x6 |
TYPICAL APPLICATION DIAGRAM
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