AC (alternating current)-DC (direct current) flyback charging circuit and charger
A charging circuit and flyback technology, which is applied to battery circuit devices, current collectors, circuit devices, etc., can solve the problems that the AC-DC fast charging scheme cannot perform normal charging and fast charging at the same time, and the cost is high, so as to improve user experience , cost saving and high efficiency
Inactive Publication Date: 2016-08-17
SHENZHEWN BAOLI MICROELECTRONICS CO LTD
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[0004] The purpose of the embodiment of the present invention is to provide an AC-DC flyback charging circuit, aiming to solve the problem that the existing AC-DC fast charging scheme cannot perform normal charging and fast charging at the same time, and the problem of high cost
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[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0017] The embodiments of the present invention all adopt a step-down method for AC-DC conversion, output multiple sets of charging voltages, which greatly saves cost and improves efficiency compared with a step-up method, and can output multiple sets of fast charging voltage and ordinary charging voltage at the same time. Meet the needs of multiple users and improve user experience.
[0018] figure 1 T...
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The invention is applied to the field of integrated circuits and provides an AC (alternating current)-DC (direct current) flyback charging circuit and a charger. The AC-DC flyback charging circuit comprises a rectifying unit for rectifying AC, an output voltage control unit for generating a voltage conversion control signal according to output voltage, a voltage converting unit for performing voltage conversion according to the voltage conversion control signal to generate first DC voltage and second DC voltage respectively, a feedback unit for feeding the DC voltage back to the output voltage control unit as well as a first voltage reduction unit and a second voltage reduction unit which are used for performing voltage reduction processing on the first DC voltage and the second DC voltage and outputting first fast charging voltage, second fast charging voltage and first common charging voltage. AC-DC conversion is performed totally through voltage reduction, multiple groups of charging voltage are output, the cost is reduced greatly compared with a boosting manner, the efficiency is high, multiple groups of fast charging voltage and common charging voltage can be output simultaneously, more requirements of a user are further met, and the user experience is improved.
Description
Technical field [0001] The invention belongs to the field of integrated circuits, and particularly relates to an AC-DC flyback charging circuit and a charger. Background technique [0002] In order to meet the long-term power supply requirements of portable devices, the battery capacity inside the device is getting larger and larger. According to the traditional charging mode, it takes longer and longer to charge the battery. In order to increase the charging speed and shorten the charging time, many companies have released fast charging methods and related agreements. In this situation, AC / DC chargers equipped with portable devices also need to have a corresponding fast charging function. These AC / DC chargers are generally equipped with one or more standard USB output ports. Recently, power strips equipped with multiple USB output ports have appeared. [0003] In the existing power strip solutions, a single winding is often used to output a fixed voltage, and multiple boost (B...
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Login to View More IPC IPC(8): H02J7/04
CPCH02J7/0071
Inventor 林信生马勋邓海飞
Owner SHENZHEWN BAOLI MICROELECTRONICS CO LTD