參數(shù)資料
型號： TPA3107D2PAPTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
封裝： 10 X 10 MM, GREEN, PLASTIC, HTQFP-64
文件頁數(shù)： 13/32頁
文件大?。?/td> 1027K
代理商： TPA3107D2PAPTG4
www.ti.com
Differential Input
SHUTDOWN OPERATION
MUTE Operation
MUTE
FAULT
ExternalGPIO
Control
TPA3107D2
SLOS509B – OCTOBER 2006 – REVISED JULY 2007
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To
use the TPA3107D2 with a differential source, connect the positive lead of the audio source to the INP input and
the negative lead from the audio source to the INN input. To use the TPA3107D2 with a single-ended source, ac
ground the INP or INN input through a capacitor equal in value to the input capacitor on INN or INP and apply
the audio source to either input. In a single-ended input application, the unused input should be ac grounded at
the audio source instead of at the device input for best noise performance.
The TPA3107D2 employs a shutdown mode of operation designed to reduce supply current (ICC) to the absolute
minimum level during periods of nonuse for power conservation. The SHUTDOWN input terminal should be held
high (see specification table for trip point) during normal operation when the amplifier is in use. Pulling
SHUTDOWN low causes the outputs to mute and the amplifier to enter a low-current state. Never leave
SHUTDOWN unconnected, because amplifier operation would be unpredictable.
For the best power-off pop performance, place the amplifier in the shutdown or mute mode prior to removing the
power supply voltage.
The MUTE pin is an input for controlling the output state of the TPA3107D2. A logic high on this terminal
disables the outputs. A logic low on this pin enables the outputs. This terminal may be used as a quick
disable/enable of outputs when changing channels on a television or transitioning between different audio
sources.
The MUTE terminal should never be left floating. For power conservation, the SHUTDOWN terminal should be
used to reduce the quiescent current to the absolute minimum level.
The MUTE terminal can also be used with the FAULT output to automatically recover from a short-circuit event.
When a short-circuit event occurs, the FAULT terminal transitions high indicating a short-circuit has been
detected. When directly connected to MUTE, the MUTE terminal transitions high, and clears the internal fault
flag. This causes the FAULT terminal to cycle low, and normal device operation resumes if the short-circuit is
removed from the output. If a short remains at the output, the cycle continues until the short is removed.
If external MUTE control is desired, and automatic recovery from a short-circuit event is also desired, an OR
gate can be used to combine the functionality of the FAULT output and external MUTE control, see Figure 27.
Figure 27. External MUTE Control
20
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