Texas Instruments SLOU121 manual Headphone Jack Control Signals, Mute/Mode Select JP6

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Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform

output mode. When the mode control input is tied to GND, the module operates in the BTL output mode. When this input is tied to VDD, the module operates in the single-ended output mode.

In the typical application, output mode switching allows the TPA6011A4 to operate in the BTL output mode for increased power to internal speakers and then switch to single-ended mode to drive headphones when a plug is inserted into the headphone jack.

3.3.4.1Headphone Jack Control Signals

The platform headphone output jack (J10) contains an internal switch that changes the state of a pair of control lines when a plug is inserted (see Figure 3–8). Each control line is pulled down by a 1-kresistor to ground (R4 and R5). The switch in the headphone jack pulls one line or the other up to VDD through a 240-resistor (R3) depending on whether a plug is inserted in J10 or not.

Figure 3–8. Mute/Mode and Polarity Control

 

VDD

 

 

R3

Polarity

 

240

 

JP8

 

 

J10

 

Lo

 

 

Headphone

Jack

 

Hi

R4

R5

SPK

1 k

1 k

(U2–U4)

JP6

Mode

U2

 

 

Power

Mute

Amplifier

 

3.3.4.2Mute/Mode Select (JP6)

A 3-pin jumper header (JP6) on the platform, functioning as an SPDT switch, routes the control signal from the headphone jack to either the shutdown control input pin or the mode control input pin of the evaluation module.

-To shut down the TPA6011A4 amplifier module using the control signal from the platform headphone jack, jumper JP6 to MUTE.

-To switch the output mode of the TPA6011A4 amplifier between BTL and single-ended using the control signal from the platform headphone jack, jumper JP6 to MODE.

3.3.4.3Mute/Mode Polarity Select (JP8)

A second 3-pin jumper header (JP8) on the platform selects the control signal polarity by connecting either the active-high or the active-low line from the headphone jack to jumper JP6.

-When JP6 is set to mute, use the following JP8 settings for the TPA6011A4:

J To shut down the TPA6011A4 amplifier module when a plug is inserted into the headphone jack, jumper JP8 to Lo (this is the typical setting).

J To shut down the TPA6011A4 amplifier module until a plug is inserted into the headphone jack, jumper JP8 to Hi.

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Details

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Contents User’s Guide Important Notice EVM Important Notice EVM Warnings and Restrictions Read This First Information About Cautions and WarningsRelated Documentation From Texas Instruments Contents Figures TablesIntroduction Feature Highlights TPA6011A4 EVM Specifications DescriptionIntroduction Quick Start EVM JP6 JP7Precautions PowerQuick Start List for Platform Platform PreparationsModule Preparation Typical TPA6011A4 EVM Jumper Settings Quick Start List for Stand-Alone Quick Start Module MapControl Inputs Quick Start Quick Start Details TI Plug-N-Play Audio Amplifier Evaluation Platform TPA6011A4 Audio Power Amplifier Evaluation Module TPA6011A4 EVMTPA6011A4 EVM Schematic Diagram 1 TPA6011A4 Audio Amplifier ICVolume Control Inputs and GainBlock Diagram of SE Volume Control DC Volume Control BTL Mode, VDD = 5 Differential Input BTL Operation Depop CircuitrySingle-Ended Operation EVM Insertion Installing and Removing EVM Boards2 TPA6011A4 Module Jumper Settings and Switches EVM Removal2.1 S1 Shutdown Switch 2.2 J1 Output Mode Jumper2.4 J3 Input and Output Mode Jumper Signal Routing2.3 J2 Input Mode Jumper 2.5 J4 Fade Mode JumperMute Shutdown/Mode Signal ConditioningHeadphone Output Jack Mute/Mode Select JP6 Headphone Jack Control SignalsMute/Mode Polarity Select JP8 Power Requirements Inputs Inputs and OutputsOutputs Using the TPA6011A4 EVM Stand-Alone 1 TPA6011A4 EVM Connected for BTL Output2 TPA6011A4 EVM Connected for Single-Ended Output 11. TPA6011A4 EVM Connected for Stereo Single-Ended OutputReference TPA6011A4 EVM Layers and Board Schematic ReferenceTPA06011A4 EVM Schematic Diagram TPA6011A4 EVM Parts List TPA6011A4 EVM Parts List

SLOU121 specifications

Texas Instruments SLOU121 is a comprehensive technical document that serves as a guide for the evaluation and implementation of various TI products. This document highlights the operational capabilities, design considerations, and practical applications of TI’s semiconductor solutions, with a focus on enabling engineers and designers to optimize their designs effectively.

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