ELECTRONIC BALLAST DRIVEN BY DC POWER SUPPLY HAVING THE CIRCUIT PROTECTED FROM LOW INPUT VOLTAGE AND LOW INPUT/OUTPUT CURRENT

摘要

The present invention relates to an electronic ballast for direct current voltage having a low input voltage and a low input / output current protection circuit, and has a variety of control functions to develop a current detection circuit that detects an overload, miswiring or no-load condition due to a lamp failure. In order to achieve the object as described above, the electronic ballast for the DC voltage according to the present invention drives the lamp 8 by receiving a DC voltage and generating a high frequency output to control the ballast. Circuit section 5; A resonant circuit portion 6 constituting the resonant circuit with the lamp 8 by the high frequency output of the inverter circuit portion 5; A current sensing unit 7 for sensing an inverter current of the inverter circuit unit 5 corresponding to the lamp output current; A low voltage and low current comparison unit (2) for comparing a comparison voltage (V5) corresponding to the input voltage (V +) or the output value (I1) of the inverter current with a reference voltage (V6); And a control unit (3) in response to the output of the low voltage and low current comparison unit (2) for generating a control signal to stop the operation of the inverter unit to stop the operation of the ballast to protect the circuit; It includes.;Ballast, DC, Low Voltage, Low Current, Protection Circuit, Low Voltage Comparator