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Single-input control circuit for programming electronic ballast parameters
Single-input control circuit for programming electronic ballast parameters
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机译:用于电子镇流器参数编程的单输入控制电路
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摘要
A circuit uses a single control input to an oscillator of an electronic ballast to program the parameters of soft-start frequency, pre-heat frequency, ignition ramp time, and ballast run frequency. The output frequency of the oscillator is based on an electrical parameter at the control input node. A resistor-capacitor network may be used to program the soft-start ramp time and ignition ramp time. The resistive element of the restive-capacitance network may be used to program the pre-heat frequency. A switchable impedance may be used to program the ballast run frequency. A look-up table circuit may also be used in the alternative to implement a single control input for the oscillator of an electronic ballast.
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