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This paper presents the continuous-conduction-mode charge-pump power-factor-correction (CCM CP-PFC) electronic ballast with DC-bus voltage stress reduction function. The CP-PFC techniques are widely applied to the electronic ballasts in order to achieve high power factor. However, the DC-bus voltage at preheat or ignition mode is higher than that at steady-state operation, which causes high voltage...
This paper presents the design consideration of the self-oscillating full-bridge electronic ballast for metal halide lamp at 2.65MHz operating frequency. The self-oscillating full-bridge electronic ballast is operated at 2.65MHz to avoid the acoustic-resonance problem of the metal halide lamp and meet the EMI limitation by IEC regulation. The gate-to-source capacitor of the MOSFETs is considered to...
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