Constant current and voltage controller carrying out pin multiplexing and a three-pin package
A technology of integrated circuits and controllers, applied in the field of switching mode power supply circuits, can solve the problems of expensive IC packaging and increased manufacturing costs
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[0057] Reference will now be made in detail to certain embodiments of the invention, examples of which are illustrated in the accompanying drawings.
[0058] image 3 is a diagram of a flyback converter 30 having a controller integrated circuit (IC) 31 packaged in an integrated circuit package 32 . Although the term "integrated circuit" is often used to refer to both an integrated circuit and an integrated circuit package in which an integrated circuit is housed, the term "integrated circuit" is used herein to refer only to an integrated circuit die. The flyback converter 30 includes a transformer for converting the output voltage to a different output voltage. In one embodiment, the input voltage is a voltage from a wall outlet and the output voltage is used to charge a portable electronic user device. When the main power switch in the converter is turned on, current begins to flow through the primary inductor of the transformer. The collapsing magnetic field around the pr...
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