Circuit for realizing fast and slow charging in linear circuits and charging control method

Abstract

The invention discloses a circuit for realizing fast and slow charging in linear circuits and a charging control method. In the circuit, a fast charging channel and a slow charging channel are adopted to charge a battery; when the voltage of the battery is low, the slow charging channel is adopted for charging; and when the voltage of the battery is normal, a fast charging mode is adopted for charging. The circuit and the method can eliminate the potential safety hazard, prevent the damage of the battery, ensure the charging speed and simultaneously prevent overcharging.

Description

technical field [0001] The invention discloses a battery charging circuit and a charging control method, in particular to a circuit and a charging control method for realizing fast and slow charging of a battery in a linear circuit. Background technique [0002] With the development of science and technology, electronic products are more and more widely used in people's daily life, especially consumer electronic products, which have become a necessity in people's life. At present, consumer electronic products mostly use lithium batteries for power supply, and then there is a problem, that is, the charging of lithium batteries. In the charging circuit in the prior art, a switch circuit is provided between the charging control circuit and the charging output circuit, and a voltage detection circuit for detecting the battery voltage is provided in the circuit at the same time, when the voltage detection circuit detects that the voltage is fully charged When charging, the contr...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the disadvantages of the above-mentioned battery charging circuit in the prior art that when the battery voltage is low, a large current will be generated for charging, which may cause danger and have potential safety hazards, the present invention provides a charging circuit, which includes a charging circuit. A control circuit, a charging switch circuit, a charging output circuit, and a voltage detection circuit, wherein the charging switch circuit includes a fast charging channel and a slow charging channel connected in parallel, and the fast charging channel adopts a first electronic control switch connected in series with a first current limiting resistor , the control end of the first electronically controlled switch is connected to the data end of the control unit, the slow pulse channel adopts the second electronically controlled switch in series with the second current limiting resistor, and the control end of the second electronically controlled switch is connected to the control unit’s on the other data side

Images