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With the UV tubeligt switched ON, measure the current consumed by the circuit through the 12V supply. You should find this to be around 2.5 amps ± 0.2 amp. In case you see this beyond this spec, you can try varying the air gap air of the choke until the issue is fixed to the spe...
This resistor is chosen to provide 2X the maximum start-up current to guarantee ballast start-up at low line input voltage. Once the capacitor voltage on VCC reaches the start-up threshold, and the SD pin is below 4.5 volts, the IC turns on and HO and LO begin to oscillate. The ...
7. The ballast of claim 1 wherein said first energy storage means comprises a series connected capacitor and charging resistor, and a spark gap connected to the junction of said series connected capacitor and charging resistor. 8. The ballast of claim 1 wherein said second transformer means inc...
The difference between a Digital Ballast & an Analog Ballast is that the Analog ballast is controled by the circuit of a capacitor & a resistor.(Older Technology), but the Digital Ballast is controlled by a CMOS Digital Chip (Newer Technology). The Digital Chip has a memory & is able to...