Abstract: An over-voltage comparator and shutdown circuit for a power converter, comprising at least a first voltage divider connected between ground and a monitored voltage, the voltage divider including a first resistor and a second resistor, a switch mode regulator connected to a primary switch of the power converter, and a first threshold comparator, wherein a monitored input of the first threshold comparator is connected between the first resistor and the second resistor, an anode of the first threshold comparator is connected to ground, and a cathode of the first threshold comparator is connected to the switch mode regulator, and wherein the monitored voltage is voltage at an end of a primary winding of the power converter. An auxiliary output circuit of the power converter may be provided having a first output providing the monitored voltage and a second output providing power to the switch mode regulator.

Abstract: An over-voltage comparator and shutdown circuit for a power converter, comprising at least a first voltage divider connected between ground and a monitored voltage, the voltage divider including a first resistor and a second resistor, a switch mode regulator connected to a primary switch of the power converter, and a first threshold comparator, wherein a monitored input of the first threshold comparator is connected between the first resistor and the second resistor, an anode of the first threshold comparator is connected to ground, and a cathode of the first threshold comparator is connected to the switch mode regulator, and wherein the monitored voltage is voltage at an end of a primary winding of the power converter. An auxiliary output circuit of the power converter may be provided having a first output providing the monitored voltage and a second output providing power to the switch mode regulator.

Abstract: A portable fan assembly adapted for seatmant on a vehicular surface in a spaced apart relationship to a child car seat, comprising a front portion, a back portion, two side portions, a top portion, and a bottom portion. An interior void is positioned centrally within the assembly, extending from the front portion to the back portion. A fan unit having a housing that is positioned within the interior void. The housing includes a central hub and at least a pair of fan blades that are mounted to the hub. The hub is rotationally connected by an elongated shaft to a fan motor configured to be operative for rotating the fan blades for directing air through the interior void. The front portion, back portion, two side portions, the top portion, and the bottom portion are substantially padded for providing a cushioning effect that prevents injury to an child situated in close proximity to the assembly, and at least one attachment strap configured to securely position the assembly to a vehicular seat.

Abstract: A portable fan assembly adapted for seatmant on a vehicular surface in a spaced apart relationship to a child car seat, comprising a front portion, a back portion, two side portions, a top portion, and a bottom portion. An interior void is positioned centrally within the assembly, extending from the front portion to the back portion. A fan unit having a housing that is positioned within the interior void. The housing includes a central hub and at least a pair of fan blades that are mounted to the hub. The hub is rotationally connected by an elongated shaft to a fan motor configured to be operative for rotating the fan blades for directing air through the interior void. The front portion, back portion, two side portions, the top portion, and the bottom portion are substantially padded for providing a cushioning effect that prevents injury to an child situated in close proximity to the assembly, and at least one attachment strap configured to securely position the assembly to a vehicular seat.