| 摘要 |
An initial frequency control circuit for an inverter is provided to prevent dimming of an LCD(Liquid Crystal Display) screen by increasing output voltage and reducing an operating frequency in an initial driving of the inverter. An initial frequency control circuit for an inverter includes a controller(200), a first resistor(R1), a second resistor(R2), a capacitor(C1), an FET(Field Effect Transistor)(Q2), and a transistor(Q1). The controller controls output voltage of the inverter. The first resistor is connected to an RT terminal for controlling a time constant of a driving frequency outputted from the controller. The second resistor is connected to the first resistor in parallel. The capacitor charges and discharges constant voltage(Vcc) inputted in an initial driving of the inverter. The FET has a gate connected to the capacitor to be turned on during a discharge time of the capacitor. The transistor switches connection of the second resistor to the RT terminal of the controller. |
