Charger circuit capable of automatically identifying positive electrode and negative electrode

Abstract

The invention discloses a charger circuit capable of automatically identifying a positive electrode and a negative electrode. A first high-performance programmable chip of which the model number is M202D is adopted, and an IC control circuit, a light-emitting diode control circuit, an IC power circuit and an output control circuit in peripheral connection and an automatic duty ratio adjusting circuit are adopted, so that the positive electrode and the negative electrode do not need to be checked when one battery is put into a battery charger, two batteries of 4.2V and 8.4V can be automatically identified, the voltage is automatically adjusted for charging, and the charger circuit has an automatic shutoff function and a current-limiting function at the same time.

Description

technical field

[0001] The invention relates to the field of charging circuits, in particular to a charger circuit for automatically identifying positive and negative electrodes. Background technique

[0002] A rechargeable battery is a rechargeable battery with a limited number of charging times. Many household appliances such as toys, remote controls, and TVs use batteries, so they all need a matching battery charger to use; but the style and use of existing battery chargers The objects are different, and the existing battery chargers need to check the positive and negative poles when placing the battery for charging, otherwise the battery will be damaged; Both V and 8.4V batteries are shared. Contents of the invention

[0003] The purpose of the present invention is to provide a charger circuit that can automatically identify positive and negative poles and is suitable for both 4.2V and 8.4V batteries.

[0004] The present invention is realized through the following t...

Examples

Embodiment Construction

[0008] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0009] See figure 1, automatic identification of positive and negative charger circuit, including IC control circuit, light emitting diode control circuit connected to IC control circuit, IC power supply circuit and output control circuit and automatic duty cycle adjustment circuit, said light emitting diode control circuit and IC power supply The circuits are connected to each other, and the output control circuit and the automatic adjustment duty cycle circuit are connected to each other; the IC control circuit includes the first chip U1, the sixth diode D6, the seventh diode D7, the fourth capacitor C4, the first Nine capacitors C9, tenth capacitors C10, eighteenth resistors R18, nineteenth resistors R19, twentieth resistors R20, twenty-fifth resistors R25, twenty-sixth resistors R26 and twenty-seventh resistors R27, the The first chip U1 i...

technical field

[0001] The invention relates to the field of charging circuits, in particular to a charger circuit for automatically identifying positive and negative electrodes. Background technique

[0002] A rechargeable battery is a rechargeable battery with a limited number of charging times. Many household appliances such as toys, remote controls, and TVs use batteries, so they all need a matching battery charger to use; but the style and use of existing battery chargers The objects are different, and the existing battery chargers need to check the positive and negative poles when placing the battery for charging, otherwise the battery will be damaged; Both V and 8.4V batteries are shared. Contents of the invention

[0003] The purpose of the present invention is to provide a charger circuit that can automatically identify positive and negative poles and is suitable for both 4.2V and 8.4V batteries.

[0004] The present invention is realized through the following t...

Examples

Embodiment Construction

[0008] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0009] See figure 1, automatic identification of positive and negative charger circuit, including IC control circuit, light emitting diode control circuit connected to IC control circuit, IC power supply circuit and output control circuit and automatic duty cycle adjustment circuit, said light emitting diode control circuit and IC power supply The circuits are connected to each other, and the output control circuit and the automatic adjustment duty cycle circuit are connected to each other; the IC control circuit includes the first chip U1, the sixth diode D6, the seventh diode D7, the fourth capacitor C4, the first Nine capacitors C9, tenth capacitors C10, eighteenth resistors R18, nineteenth resistors R19, twentieth resistors R20, twenty-fifth resistors R25, twenty-sixth resistors R26 and twenty-seventh resistors R27, the The first chip U1 i...

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