Hello everyone ! How to adjust the VGH VGL voltage in a separate schematic
Current voltage
Input 3.3v
VGH 24v
VGL -15v
VOUT 9v
For example, how to stabilize the VGH voltage at 20v or 22V. The VGL voltage remains unchanged
How to adjust VGL to -12 VGH unchanged
Thank you!
Emanuel Veröffentlicht am January 14, 2021
Of course it is to increase, you just choose a 20V or 22V regulator tube.
Martha Veröffentlicht am January 14, 2021
Change the value of the regulator!
River Veröffentlicht am January 14, 2021
Your voltage regulator adjusts the voltage, right?
Allen Veröffentlicht am January 14, 2021
In the power supply of the TFT LCD screen driving circuit, the VGH voltage and the VGL voltage are responsible for turning on the TFT (thin film field effect tube) to charge the capacitor (correcting the voltage across the capacitor) and turning off the TFT to maintain the capacitor voltage (one cycle time) . If there is a problem with this VGH and VGL voltage, voltage loss or voltage amplitude change, it will cause image failure and many failure phenomena.
