Electronic ballast with a digital control unit

摘要

The ballast has an equalization circuit (3) to generate an intermediate circuit voltage, and a power inverter (4) that is supplied with the voltage. The circuit (3) has a switching regulator, and a control circuit (6) that determines operating parameters of the circuit (3). The circuit (6) has an analog-to-digital converter (ADC1) for converting the parameters to a digital value. The circuit (6) calculates switching information based on the value and transmits the information to a driver circuit (7). The circuit (7) converts the information into a control signal for controlling a switch (S1).