A charging circuit with autonomous mode switching
A technology for autonomous switching and charging circuits, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as poor adaptability of chargers, achieve convenient implementation, improve the corresponding speed and stability of adjustment, and simple structure. Effect
Active Publication Date: 2020-12-29
XIAN MICROELECTRONICS TECH INST
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Problems solved by technology
[0003] The purpose of the present invention is to provide a charging circuit with autonomous mode switching to overcome the poor adaptability problem of existing chargers
Method used
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[0021] The present invention is described in further detail below in conjunction with accompanying drawing:
[0022] Such as figure 1 As shown, a charging circuit with autonomous mode switching, including a main power circuit, a diode D1, a constant current mode control circuit, a voltage reference circuit and a constant voltage and constant current switching circuit;
[0023] Such as figure 1 Among them, the voltage regulation end, that is, the output end of the main power circuit, is connected to the positive pole of the diode D1, and the negative pole of the diode is connected to the constant current mode control circuit; the voltage reference circuit provides the circuit with a reference voltage of 2.5V and a working voltage of the low voltage comparator of 10V;
[0024] Diode D1 adopts Schottky diode D1, which is used to prevent the overdrive problem of the op amp for the adjustment port of the power conversion circuit;
[0025] The voltage reference circuit includes a ...
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The invention discloses an automatic mode switching type charging circuit, which comprises a main power circuit, a diode D1, a constant-current mode control circuit, a voltage reference circuit and aconstant-voltage and constant-current switching circuit. The main power circuit is connected with the constant-current mode control circuit through the diode D1, and the voltage reference circuit is connected to a power supply end VCC and used for providing reference voltage for the constant-current mode control circuit and the constant-voltage and constant-current switching circuit and providingoperating voltage for a low-voltage comparator. A high-level output end of the constant-current mode control circuit is connected with the constant-voltage and constant-current switching circuit. Theconstant-current mode control circuit is used for realizing constant-current control and adjusting an output value of the reference voltage. The constant-voltage and constant-current switching circuitis used for battery end voltage detection and completing switching of constant-voltage and constant-current charging modes, so that switching of the constant-voltage and constant-current charging modes is realized, and constant-current charging of rechargeable batteries is realized. The automatic mode switching type charging circuit is simple in structure, convenient to adjust and adjustable in constant-current charging value.
Description
technical field [0001] The invention belongs to the technical field of charging circuits, and in particular relates to a charging circuit with autonomous mode switching. Background technique [0002] In order to ensure that the charger and the battery can match and run, and the battery can be fully charged quickly during charging, many power chargers can only charge a certain type of rechargeable battery. Once the rechargeable battery model changes, the corresponding charging The converter often needs to be re-adapted to the new battery, which requires a lot of changes in the circuit or program, which makes the product development cycle longer. However, the existing charger has the problem of poor adaptability of the charger. Contents of the invention [0003] The purpose of the present invention is to provide a charging circuit with automatic mode switching, so as to overcome the problem of poor adaptability of the existing chargers. [0004] To achieve the above object...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0077
Inventor 范喆蒲文华薛程颢马亚霞王凤娟
Owner XIAN MICROELECTRONICS TECH INST