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Charging indicator driver circuit for bluetooth products

A charging indicator light and driving circuit technology, applied in battery circuit devices, circuit monitoring/indication, electric vehicles, etc., can solve the problems of not being fully charged, battery consumption, consumption, etc. The effect of experience

Active Publication Date: 2022-07-01
RISUNTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this period of time, the Bluetooth main control chip and the full charge indicator light will continue to consume the power in the battery. If the user does not remove the charge immediately, part of the full charge will be consumed, resulting in that the battery is not fully charged when the charge is removed. Fully charged

Method used

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  • Charging indicator driver circuit for bluetooth products

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Embodiment Construction

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like figure 1 As shown, a charging indicator driving circuit of a Bluetooth product includes a first branch and a second branch;

[0023] The first branch includes a battery voltage VBAT, a diode D2, a resistor R8, a first LED indicator light, a first switch tube, a resistor R5, a resistor R2, a diode D3, a resistor R4, a second switch tube, and a resistor connected in series. R9, resistor R10, the resistor R2 has a first resistor end and a second resistor end for connecting to the GREEN_LED end of the Bluetooth master chip 20;

[0024] The battery voltage VBAT is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the anode of the first LED indicator through the resistor R8, and the cathode of the first LED indicator is connected to the first end of the first switch tube. The control of the first switch tu...

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PUM

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Abstract

The invention relates to a driving circuit for a charging indicator light of a Bluetooth product, which includes a first branch and a second branch; the first branch includes a battery voltage VBAT, a diode D2, a resistor R8, a first LED indicator, and a first switch tube, resistor R5, resistor R2, resistor R4, diode D3, second switch tube, and resistor R9 and resistor R10 connected in series; the second branch includes diode D1, resistor R7, second LED indicator, third switch tube, Resistor R6, resistor R1, resistor R3 and external charging voltage VBUS; its overall circuit structure design is ingenious and reasonable. When charging, the corresponding indicator light is only powered by the external charging voltage VBUS to ensure that during the charging process, all circuits except charging are Do not start, do not consume the power of the battery in the Bluetooth product, and ensure that no matter how long the charging state is removed after being fully charged, the battery in the Bluetooth product is fully charged, improving the user experience.

Description

technical field [0001] The invention relates to the technical field of a charging indicator light driving circuit, in particular to a charging indicator light driving circuit of a Bluetooth product, which is mainly applied to a Bluetooth headset. Background technique [0002] Existing bluetooth products such as bluetooth earphones have occupied the main market of earphones, but the neck-mounted bluetooth earphones still have a place. For the sake of charging safety, many brands have specified a charging scheme, which realizes the charging display function and also has a low battery display and a Bluetooth function display, all of which need to be completed by the Bluetooth main chip. [0003] Since the bluetooth main control chip is powered by a battery, it will still consume a certain amount of power after it is turned off. If it is not used for a long time, the battery voltage will drop below the starting voltage of the bluetooth main control chip. When the Bluetooth main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/3725H05B45/30H02J7/00
CPCH05B45/3725H05B45/30H02J7/0049Y02B20/30
Inventor 沈庆凯胡平李鑫
Owner RISUNTEK INC