Control device and method of bidirectional switching circuit
A two-way switching circuit and switching technology, applied in output power conversion devices, control/regulation systems, electrical components, etc., can solve problems such as power failure and energy interruption
Active Publication Date: 2018-06-19
CHENGDU MONOLITHIC POWER SYST
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Problems solved by technology
However, in the process of switching from the BUCK circuit to the BOOST circuit, that is, when the battery BATT is switched from the charging state to the discharging state, the energy provided to the system load RL will be interrupted, that is, there may be a power failure phenomenon
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[0025]Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.
[0026] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in one...
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The present invention discloses a control circuit and method of a bidirectional switching circuit and the bidirectional switching circuit. The bidirectional switching circuit comprises a Buck mode anda Boost mode, under the Buck mode, a battery is located in a charging state, and under the Boost mode, the battery is located in a discharging state. The Buck mode and the Boost mode are decided by the sizes of a second-end current feedback control signal and a first-end voltage feedback control signal, thereby guaranteeing that on the condition that the power supply of a power supply is insufficient, the power supply and the battery supply power to a load simultaneously, thereby satisfying the load requirements. The control circuit and the control method of the bidirectional switching circuit disclosed by the present invention can be used for a battery power supply management system, and have the advantages of being simple in circuit structure and being able to realize the seamless reversing switching.
Description
technical field [0001] The present invention relates to an electronic circuit, in particular, to a bidirectional switch circuit in a switch circuit. Background technique [0002] figure 1 Shown is an existing battery power supply management system 10, which is suitable for applications such as charging treasures and bluetooth earphones. The system load is characterized by resistance RL. When the system 10 is connected to the power supply VS, the power supply VS supplies power to the system load RL, and at the same time charges the battery BATT; when the system 10 is not connected to the power supply VS, the battery BATT supplies power to the system load RL. When the system 10 is connected to the power supply VS, when the system load RL is large, the power supply VS will reduce the charging current of the battery BATT to meet the requirements of the system load RL; when the system load RL continues to increase to exceed the power supply VS When the power is high, the power...
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IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 徐敏杜磊
Owner CHENGDU MONOLITHIC POWER SYST