"i) As a mobile power supply / charger to notebook PC users that always travel by cars.
ii) As an AC power source to power-up selected household electrical appliances that
having power less than 120W directly from a car battery.
This product is an adapter that converts 12Vdc into 240Vac so that most common relatively small powered AC appliances to be used inside the car. The adapter is actually a 120W switching-mode power inverter (SMPI) that generally will power-up selected AC appliances. The SMPI uses the reversed technology of a typical switching-mode power supply (SMPS) and in-fact the step-up transformer used was taken from a similar rated designed power of an SMPS.
The 12Vdc supply is chopped through a MOSFET with a frequency of 25kHz to get a high frequency DC pulses that input into a high-frequency switching transformer which steps up to high voltage 240Vac with the frequency of 25kHz. Then, the voltage is rectified and filtered to a high-voltage smoothed DC and goes through an H-bridge inverter where the output produces 240Vac, 50Hz to a given AC load.
This invention uses a relatively small high frequency switching transformer which works on high frequency DC switching pulses of 25kHz, which is very much lighter, smaller and low-profile sizing compares to its conventional predecessors.
The product is highly potential to traveling businessmen and field worked personnel that always find necessary to have a portable source of AC supply that simply can be plugged into a car???s cigarette lighter supply, as to power-up their relevant appliances."