18931363. NEUTRAL-LESS DIMMERS WITH A ZERO CROSSING DETECTION IMPROVEMENT CIRCUIT (EATON INTELLIGENT POWER LIMITED)
NEUTRAL-LESS DIMMERS WITH A ZERO CROSSING DETECTION IMPROVEMENT CIRCUIT
Organization Name
EATON INTELLIGENT POWER LIMITED
Inventor(s)
Justin Franke of Sharpsburg GA US
NEUTRAL-LESS DIMMERS WITH A ZERO CROSSING DETECTION IMPROVEMENT CIRCUIT
This abstract first appeared for US patent application 18931363 titled 'NEUTRAL-LESS DIMMERS WITH A ZERO CROSSING DETECTION IMPROVEMENT CIRCUIT
Original Abstract Submitted
A dimmer includes a TRIAC, a zero crossing detection circuit coupled to the TRIAC and structured to detect zero crossing of line voltage; a gate control circuit coupled to a gate of the TRIAC and the zero crossing detection circuit, the gate control circuit structured to drive the gate of the TRIAC to switch between an on phase and an off phase; a power supply circuit coupled to the gate control circuit and the zero crossing detection circuit, the power supply circuit structured to supply power to at least the gate control circuit and the zero crossing detection circuit; a snubber circuit coupled to the TRIAC and structured to limit fast transient voltages; and a zero crossing detection improvement circuit comprising a first switch and a second switch and structured to block current from flowing through the power supply circuit and the snubber circuit during the off phase.