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| 型號： | TSC2100IRHBRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數(shù)： | 29/77頁 |
| 文件大?。?/td> | 1079K |
| 代理商： | TSC2100IRHBRG4 |
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TSC2100
SLAS378 NOVEMBER 2003
www.ti.com
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AVDD, DRVDD V
THD
T
otal
Harmonic
Distortion
dB
Figure 33. THD vs AVDD, DRVDD Supply Voltage (255C When Driving a 1 dB, 1-kHz Sinewave From the
DAC Into an 8-W Load, with DAC Output Swing Set to 2.4 V, and Short-Circuit Protection Disabled)
The TSC2100 incorporates a programmable short-circuit detection/protection function with different modes of operation.
During the insertion or removal of a headphone plug from the jack, the output pins of the drivers may be accidentally shorted,
causing the part to potentially draw a huge current, which may cause the power supply voltages to dip. Bits D8D7 of
REG1DH/Page2 control how the short-circuit detection/protection operates in the TSC2100. One option is to fully disable
short-circuit protection, which also enables the audio output drivers to deliver more power to a low-impedance load (such
as an 8- speaker). However, care must be taken to prevent any short-circuit from occurring while the part is in this mode.
A second programmable configuration enables current-limiting in the audio output drivers, so that excessive currents
cannot be provided if the outputs are shorted. It also enables the internal short-circuit detection function, which can detect
excess current being drawn from the drivers and set a short circuit detect flag (Page2, REG1DH, BITD6). This flag can
be read by the user to powerdown the drivers if desired. This flag is cleared only if the short-circuit condition is removed.
If the user does not monitor this flag and powers down the drivers when a short-circuit occurs, the current-limiting prevents
excessive currents from being drawn, but power dissipation is higher due to this limited current flowing through the short.
In a third programmable configuration, the TSC2100 can be programmed to monitor and automatically powerdown the
audio output drivers upon detection of a short-circuit condition (Page2, REG1DH, BITD7), in addition to setting the
short-circuit flag in Page2, REG1DH, BITD6. When the device has detected a short and resulted in this condition, the
short-circuit flag is cleared when all the routings to the speaker driver are disabled (i.e. DAC, Analog Mixer, and Keyclick
blocks are powered down by user).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSC2100IRHBRMULT1 | 制造商:Texas Instruments 功能描述: |
| TSC2101 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO CODEC WITH INTERATED HEADPHONE SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER |
| TSC2101_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER |
| TSC2101_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER |
| TSC2101EVM | 功能描述:顯示開發(fā)工具 TSC2101 Eval Mod RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
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