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參數資料
| 型號： | TPA2051D3YFFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25 |
| 封裝： | 2.16 X 2.11 MM, 0.40 MM PITCH, GREEN, WCSP-25 |
| 文件頁數： | 13/34頁 |
| 文件大小： | 1594K |
| 代理商： | TPA2051D3YFFT |
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OPERATION WITH DELAYED DVDD SUPPLY
TPA2051D3
8 Dual-Mode
Speaker
Stereo
HeadphoneJack
SCL
SDA
PVDD/AVDD
DVDD
EN
BBIC
SCL
SDA
GPIO(EN)
DVDD
SHUTDOWN CONTROL AND POWER MANAGEMENT
Charge Pump Enable
Class-D Output Amplifier
SLOS641A – JUNE 2009 – REVISED OCTOBER 2009 ..................................................................................................................................................... www.ti.com
In case the DVDD supply can not be available within tpws(refer to Figure 3) use the supply of TPA2051D3 (AVDD
or PVDD) to power up DVDD. Refer to Figure 39 for an application diagram. The TPA2051D3 DVDD supply
must be less than or equal to SDA/SCL VIH. SDA/SCL VIH can be higher than DVDD but must be lower than
PVDD.
Figure 39. Operation With Delayed DVDD Supply
Power management for the TPA2051D3 is divided into four sections: Class-D power amplifier, headphone left
amplifier, headphone right amplifier, and bypass mode. Each section has its own enable bit in the Amplifier
Control byte (Register 1). Set Register 1, Bits 3 through 0 to logic low to turn off the amplifier via software
control.
The software shutdown mode can also be achieved by changing the SWS to logic high (Register 1, Bit 4). This
will turn off all sections of the amplifier and also the reference and bias circuitry, regardless of the settings on
Register 1, Bits 3 through 1.
For lowest current consumption in shutdown mode change the EN pin to logic low or change SWS to logic HIGH.
This will turn off all sections of the amplifier including reference, and bias.
All register contents are maintained provided the supply voltage is not powered down. On supply power-down, all
information programmed into the registers by the user is lost, returning all registers back to their default state
once power is reapplied.
The charge pump generates a negative voltage supply for the headphone amplifiers. This allows a 0 V bias on
the amplifier outputs, eliminating the need for an output coupling capacitor. The charge pump will automatically
activate if either the HPL_Enable or HPR_Enable bits are set to logic high.
The input to the Class-D amplifier is always a mono sum (L + R) of the mux output, regardless of mux mode. Set
the Spk_Enable bit (Register 1, Bit 1) to logic high to enable the Class-D power amplifier. The Class-D amplifier
draws 4.9 mA of typical supply current when active and less than 1
A when deactivated.
The gain of the Class-D amplifier can be selected between +6 dB and +12 dB. Set register 5 bit 7 to logic low to
select a gain of +6 dB and to logic high to select a gain of +12 dB.
20
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPA2051D3
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| TPA2054D4AYZKR | 功能描述:音頻放大器 1.4 W/Ch 3-Inp Audio Subsystem RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2054D4AYZKT | 功能描述:音頻放大器 1.4 W/Ch 3-Inp Audio Subsystem RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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| TPA2054D4YZKR | 功能描述:音頻放大器 1.4 W/Ch Stereo Class-D Aud Subsys RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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