PCB compatible with single channel and double channels

Abstract

A PCB compatible with a single channel and double channels is characterized in that a ninth pin of a power amplifier chip U8 is combined with a tenth pin through a capacitor C73 and then is connected with a first end of a loudspeaker SP3 through an inductor L10, and an eleventh pin of the power amplifier chip U8 is combined with a twelfth pin through a capacitor C69 and then is respectively connected with a second end of the loudspeaker SP3 and a second end of a loudspeaker SP2 through an inductor L9; a fourteenth pin of the power amplifier chip U8 is combined with a thirteenth pin through a capacitor C62 and then is connected with a first end of a loudspeaker SP2 and a second end of a loudspeaker SP1 through an inductor L8. A sixteenth pin of the power amplifier chip U8 is combined with a fifteenth pin through a capacitor C58 and then is connected with the first end of the loudspeaker SP1 through an inductor L7. A resistor R41 is arranged between the inductors L7 and L8; and a resistor R46 is arranged between the inductors L9 and L10. The single PCB can jointly achieve the single-channel function and the dual-channel function mainly through switching of the resistors R41 and R46, when the resistors R41 and R46 are welded to 0R, single-channel output is achieved, and when the resistors R41 and R46 are not welded, dual-channel output is achieved.

Description

Technical Field

[0001] The utility model relates to a PCB board, in particular to a PCB board compatible with single channels and dual channels. Background Art

[0002] Each electronic product on the market is produced and assembled with the same type of PCB board. When product A is needed, PCB board A is needed, when product B is needed, PCB board B is needed, and when product C is needed, PCB board C is needed. When different products require different PCB boards, the production process, testing, and PCB board steel mesh costs of each board will increase, as well as the archived data. The complex PCB board production process will delay more time and increase the difficulty of processing; each PCB board has a defect rate during production, and the defect rate will also increase when producing multiple PCB boards. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a PCB board which is compatible with single channel and dual channel, the production efficiency is improved, the defective rate of PCB board is reduced, and the cost is also reduced.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a PCB board compatible with single channel and dual channel, including power amplifier chip U8, speaker SP1, speaker SP2 and speaker SP3, the 9th foot of the power amplifier chip U8 is combined with the 10th foot through capacitor C73 and then connected to the first end of the speaker SP3 through inductor L10, the 11th foot of the power amplifier chip U8 is combined with the 12th foot through capacitor C69 and then connected to the second end of the speaker SP3 and the second end of the speaker SP2 through inductor L9, the 14th foot of the power amplifier chip U8 is combined with the 13th foot through capacitor C62 and then connected to the second end of the speaker SP3 and the second end of the speaker SP2 through inductor L8 respectively. It is connected to the first end of the speaker SP2 and the second end of the speaker SP1, and the 16th pin of the power amplifier chip U8 is combined with the 15th pin via the capacitor C58 and then connected to the first end of the speaker SP1 via the inductor L7; when the resistor R41 between the input end of the inductor L7 and the input end of the inductor L8 and the resistor R46 between the input end of the inductor L9 and the input end of the inductor L10 are 0R resistors, the power amplifier chip U8 is a single-channel output; when the resistor R41 between the input end of the inductor L7 and the input end of the inductor L8 and the resistor R46 between the input end of the inductor L9 and the input end of the inductor L10 are not welded, the power amplifier chip U8 is a dual-channel output. Principle of the utility model: A single PCB board can realize single-channel and dual-channel functions mainly by switching resistors R41 and R46. When resistors R41 and R46 are welded with 0R, it is single-channel output. When resistors R41 and R46 are not welded, it is dual-channel output. Secondly, resistor R16, capacitor C63, resistor R43, capacitor C65, inductor L7, inductor L10, capacitor C53 and capacitor C75 component parameters are used for modification and compensation.

[0005] As an improvement, it also includes a Bluetooth chip U2. When in single channel, the outputs of DAC_R on pin 46 and DAC_L on pin 47 of the Bluetooth chip U2 are respectively connected to resistors R18 and R17 through capacitors C36 and C37, and then input to pin 7 of the power amplifier chip U8 through capacitor C71; when in dual channel, the outputs of DAC_R on pin 46, DAC_L on pin 47 and DAC_X on pin 48 of the Bluetooth chip U2 are respectively connected to one end of resistors R18, R17 and R16 through capacitors C36, C37 and C38, and the resistors R18 and R17 are combined and input to one end of resistor R16 through capacitors C71 and C63 to pin 7 and pin 3 of the power amplifier chip U8.

[0006] As an improvement, the model of the power amplifier chip U8 is CS8673E, and the model of the Bluetooth chip U2 is BP1048B2.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] A single PCB board can realize single-channel and dual-channel functions mainly by switching resistors R41 and R46. When resistors R41 and R46 are welded with 0R, it is single-channel output. When resistors R41 and R46 are not welded, it is dual-channel output. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The flow direction of a single-channel signal on the PCB board.

[0010] Figure 2 The flow direction of dual-channel signals on the PCB board.

[0011] Figure 3 This is the circuit schematic diagram of a single-channel PCB board.

[0012] Figure 4 This is the circuit schematic diagram of the dual-channel PCB board. DETAILED DESCRIPTION

[0013] The utility model will be further described below in conjunction with the accompanying drawings.

[0014] A PCB board compatible with single-channel and dual-channel includes a Bluetooth chip U2, a power amplifier chip U8, a speaker SP1, a speaker SP2 and a speaker SP3. The model of the power amplifier chip U8 is CS8673E, and the model of the Bluetooth chip U2 is BP1048B2.

[0015] like Figures 1 to 4 As shown, the 9th pin of the power amplifier chip U8 is combined with the 10th pin via the capacitor C73 and then connected to the first end of the speaker SP3 via the inductor L10. The 11th pin of the power amplifier chip U8 is combined with the 12th pin via the capacitor C69 and then connected to the second end of the speaker SP3 and the second end of the speaker SP2 via the inductor L9. The 14th pin of the power amplifier chip U8 is combined with the 13th pin via the capacitor C62 and then connected to the first end of the speaker SP2 and the second end of the speaker SP1 via the inductor L8. Pin 16 is combined with pin 15 through capacitor C58 and then connected to the first end of speaker SP1 through inductor L7; when the resistor R41 between the input end of inductor L7 and the input end of inductor L8 and the resistor R46 between the input end of inductor L9 and the input end of inductor L10 are 0R resistors, the power amplifier chip U8 is a single-channel output; when the resistor R41 between the input end of inductor L7 and the input end of inductor L8 and the resistor R46 between the input end of inductor L9 and the input end of inductor L10 are not welded, the power amplifier chip U8 is a dual-channel output.

[0016] like Figure 1 , 3As shown, when single-channel input is performed, the outputs of the DAC_R and DAC_L of the 46th and 47th pins of the Bluetooth chip U2 are respectively connected to the resistors R18 and R17 through the capacitors C36 and C37, and then input to the 7th pin of the power amplifier chip U8 through the capacitor C71. When single-channel output is performed, the input signal is amplified by the internal operation of the power amplifier chip U8, and then output to one end of the inductor L9 through the capacitors C73 and 10th pins of the power amplifier chip U8 through the resistor R46 and the 12th and 11th pins through C69, and then output to one end of the inductor L9. The 15th and 16th pins of the power amplifier chip U8 are combined through the capacitor C58, the resistor R41, the 13th and 14th pins, and the capacitor C62, and then output to one end of the inductor L8. The signal is then output to the other end of the inductors L8 and L9 to the terminal of the speaker SP2, completing the single-channel output process.

[0017] like Figure 2 , 4 As shown, when dual-channel input is used, the outputs of the DAC_R at pin 46, the DAC_L at pin 47 and the DAC_X at pin 48 of the Bluetooth chip U2 are respectively transmitted through capacitors C36, C37 and C38 to one end of resistors R18, R17 and R16. The resistors R18 and R17 are combined with one end of the resistor R16 and then respectively input to the 7th and 3rd pins of the power amplifier chip U8 through capacitors C71 and C63. During dual-channel output, after the signal is amplified by the internal operation of the power amplifier, the first channel is output from the 9th pin of the power amplifier chip U8 through the capacitor C73 and the 10th pin to one end of the inductor L10, and the 12th and 11th pins of the power amplifier chip U8 are combined through the capacitor C69 and output to one end of the inductor L9. The other ends of the inductors L10 and L9 are output to the speaker SP3 terminal; the second channel is output from the 13th and 14th pins of the power amplifier chip U8 through the capacitor C62 and output to one end of the inductor L8, and the 15th and 16th pins of the power amplifier chip U8 are combined through the capacitor C58 and output to one end of the inductor L7. The other ends of the inductors L8 and L7 are output to the speaker SP1 terminal; both channels have signal outputs, thus completing the dual-channel output process.

[0018] Principle of the utility model: A single PCB board can realize single-channel and dual-channel functions mainly by switching resistors R41 and R46. When resistors R41 and R46 are welded with 0R, it is single-channel output. When resistors R41 and R46 are not welded, it is dual-channel output. Secondly, resistor R16, capacitor C63, resistor R43, capacitor C65, inductor L7, inductor L10, capacitor C53 and capacitor C75 component parameters are used for modification and compensation.

Claims

1. A PCB board compatible with single channel and dual channel, characterized in that: The power amplifier chip U8 includes a power amplifier chip U8, a speaker SP1, a speaker SP2 and a speaker SP3. The 9th pin of the power amplifier chip U8 is combined with the 10th pin through a capacitor C73 and then connected to the first end of the speaker SP3 through an inductor L10. The 11th pin of the power amplifier chip U8 is combined with the 12th pin through a capacitor C69 and then connected to the second end of the speaker SP3 and the second end of the speaker SP2 through an inductor L9. The 14th pin of the power amplifier chip U8 is combined with the 13th pin through a capacitor C62 and then connected to the first end of the speaker SP2 and the second end of the speaker SP1 through an inductor L8. The 16th pin of the power amplifier chip U8 is connected to the first end of the speaker SP1 through the inductor L7 after being combined with the 15th pin via the capacitor C58; when the resistor R41 between the input end of the inductor L7 and the input end of the inductor L8 and the resistor R46 between the input end of the inductor L9 and the input end of the inductor L10 are 0R resistors, the power amplifier chip U8 is a single-channel output; when the resistor R41 between the input end of the inductor L7 and the input end of the inductor L8 and the resistor R46 between the input end of the inductor L9 and the input end of the inductor L10 are not welded, the power amplifier chip U8 is a dual-channel output.

2. A PCB board compatible with single channel and dual channel according to claim 1, characterized in that: It also includes a Bluetooth chip U2. When in single channel, the outputs of the DAC_R at the 46th pin and the DAC_L at the 47th pin of the Bluetooth chip U2 are respectively connected to the resistors R18 and R17 through the capacitors C36 and C37, and then input to the 7th pin of the power amplifier chip U8 through the capacitor C71; when in dual channel, the outputs of the DAC_R at the 46th pin, the DAC_L at the 47th pin and the DAC_X at the 48th pin of the Bluetooth chip U2 are respectively connected to the resistors R18, R17 and R16 through the capacitors C36, C37 and C38, and the resistors R18 and R17 are combined and connected to the end of the resistor R16 and then respectively input to the 7th pin and the 3rd pin of the power amplifier chip U8 through the capacitors C71 and C63.

3. A PCB board compatible with single channel and dual channel according to claim 2, characterized in that: The model of the power amplifier chip U8 is CS8673E, and the model of the Bluetooth chip U2 is BP1048B2.

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