Datenblatt-Suchmaschine für elektronische Bauteile |
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TPA6030A4 Datenblatt(PDF) 7 Page - Texas Instruments |
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TPA6030A4 Datenblatt(HTML) 7 Page - Texas Instruments |
7 / 30 page TPA6030A4 SLOS395B − DECEMBER 2002 − REVISED JANUARY 2005 www.ti.com 7 The volume in single-ended (SE) mode is determined by the following equation: SE Volume + min [(VOLUME * SEDIFF) or (SEMAX)]*6dB, where VOLUME is the voltage (expressed in terms of %VREF) applied to the VOLUME pin, SEDIFF is the voltage (%VREF) applied to the SEDIFF pin, and SEMAX is the voltage (%VREF) applied to the SEMAX pin. The SE Volume control is integrated into the 32-step volume control. A block diagram of the SE Volume control portion is shown in Figure 1. + + − VOLUME SEDIFF SEMAX Control 2:1 Mux VOLUME−SEDIFF SEMAX To Next Stage of 32-Step Volume Control Figure 1. Block Diagram of the SE Volume Control Refer to the section entitled Volume Control Description in the Application Information section of this data sheet for more details regarding the use of the volume control. Speaker Volume Headphone Volume With SEMAX Set to 5VREF Headphone Volume With SEMAX Set to 7.2 dB VOLUME CONTROL 40 30 20 10 0 −10 −20 −30 −40 −50 −60 −70 −80 −90 010 20 30 40 50 %5VREF 60 70 80 90 100 SEDIFF = 0 V Figure 2. Speakers (BTL) and Headphones (SE) Volume vs %5VREF Figure 2 illustrates the functionality of the TPA6030A4 volume control. As the voltage applied to the VOLUME control pin is increased, the volume increases. Increasing the voltage on the SEDIFF pin increases the delta in volume between speaker (BTL) and headphone (SE) volume from a minimum of 6 dB to a maximum reduction in headphone volume, resulting in mute. The SEMAX input limits the maximum output level in headphone mode. The dashed line shows operation with SEMAX set to 5VREF, which results in maximum output in headphone mode. The horizontal line in Figure 2 shows operation with SEDIFF set to 0V, and SEMAX set to 67.3% of 5VREF, for a maximum volume in headphone mode of 7.2 dB. Neither SEMAX nor SEDIFF have any affect on the volume in speaker mode. |
Ähnliche Teilenummer - TPA6030A4_07 |
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Ähnliche Beschreibung - TPA6030A4_07 |
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