| 摘要 |
An LCD backlight inverter that comprises a power stage that includes a first power switch and a second power switch that powers one or more cold cathode fluorescent lamps. A controller generates control signals, receives an IC supply input signal having a voltage level equaling or exceeding a prescribed threshold level, and provides a steady-state internal oscillation that drives said first and second power switches. A transient prevention circuit maintains said second power switch in a nonconducting state until at least a time at which said IC supply input signal reaches said prescribed voltage threshold. Alternatively, a transient prevention circuit maintains said second power switch in a nonconducting state until at least a time at which said IC supply input signal reaches said prescribed voltage threshold, and additionally prevents the controller oscillator from generating said internally generated oscillation until at least a time at which a supply voltage to the IC reaches a threshold value. |
