- 您現在的位置：買賣IC網 > PDF目錄98273 > TPA3107D2PAP (TEXAS INSTRUMENTS INC) 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 PDF資料下載
參數資料
| 型號： | TPA3107D2PAP |
| 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： | 11/32頁 |
| 文件大小： | 1027K |
| 代理商： | TPA3107D2PAP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
www.ti.com
Bootstrap Capacitors
VCLAMP Capacitors
Internal Regulated 4-V Supply (VREG)
VBYP Capacitor Selection
ROSC Resistor Selection
F
=
OSC
1
2xROSCxCOSC
(4)
SLOS509B – OCTOBER 2006 – REVISED JULY 2007
The full H-bridge output stages use only NMOS transistors. Therefore, they require bootstrap capacitors for the
high side of each output to turn on correctly. A 220-nF ceramic capacitor, rated for at least 25 V, must be
connected from each output to its corresponding bootstrap input. Specifically, one 220-nF capacitor must be
connected from xOUTP to BSxx, and one 220-nF capacitor must be connected from xOUTN to BSxx. (See the
application circuit diagram in Figure 19.)
The bootstrap capacitors connected between the BSxx pins and corresponding output function as a floating
power supply for the high-side N-channel power MOSFET gate drive circuitry. During each high-side switching
cycle, the bootstrap capacitors hold the gate-to-source voltage high enough to keep the high-side MOSFETs
turned on.
To ensure that the maximum gate-to-source voltage for the NMOS output transistors is not exceeded, two
internal regulators clamp the gate voltage. Two 1-
μF capacitors must be connected from VCLAMPL (pin 40) and
VCLAMPR (pin 41) to ground and must be rated for at least 16 V. The voltages at the VCLAMPx terminals may
vary with VCC and may not be used for powering any other circuitry.
The VREG terminal (pin 19) is the output of an internally generated 4-V supply, used for the oscillator,
preamplifier, and gain control circuitry. It requires a 10-nF capacitor, placed close to the pin, to keep the
regulator stable.
This regulated voltage can be used to control GAIN0, GAIN1, MSTR/SLV, and MUTE terminals, but should not
be used to drive external circuitry.
The internal bias generator (VBYP) nominally provides a 1.25-V internal bias for the preamplifier stages. The
external input capacitors and this internal reference allow the inputs to be biased within the optimal
common-mode range of the input preamplifiers.
The selection of the capacitor value on the VBYP terminal is critical for achieving the best device performance.
During power up or recovery from the shutdown state, the VBYP capacitor determines the rate at which the
amplifier starts up. When the voltage on the VBYP capacitor equals VBYP, the device starts a 16.4-ms timer.
When this timer completes, the outputs start switching. The charge rate of the capacitor is calculated using the
standard charging formula for a capacitor, I = C x dV/dT. The charge current is nominally equal to 250A and dV
is equal to VBYP. For example, a 1-F capacitor on VBYP would take 5 ms to reach the value of VBYP and
begin a 16.4-ms count before the outputs turn on. This equates to a turn-on time of <30 ms for a 1-F capacitor
on the VBYP terminal.
A secondary function of the VBYP capacitor is to filter high-frequency noise on the internal 1.25-V bias
generator. A value of at least 0.47F is recommended for the VBYP capacitor. For the best power-up and
shutdown pop performance, the VBYP capacitor should be greater than or equal to the input capacitors.
The resistor connected to the ROSC terminal controls the class-D output switching frequency using Equation 4:
COSC is an internal capacitor that is nominally equal to 20 pF. Variation over process and temperature can
result in a
±15% change in this capacitor value.
For example, if ROSC is fixed at 100 k
, the frequency from device to device with this fixed resistance could
vary from 217 kHz to 294 kHz with a 15% variation in the internal COSC capacitor. The tolerance of the ROSC
resistor should also be considered to determine the range of expected switching frequencies from device to
device. It is recommended that 1% tolerance resistors be used.
19
相關PDF資料 |
PDF描述 |
|---|---|
| TPA3107D2PAPRG4 | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TPA3107D2PAPTG4 | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TPA3107D2PAPG4 | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TPA3110D2PWPR | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| TPA3110D2PWP | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3107D2PAPG4 | 功能描述:音頻放大器 15W Stereo Class-D Aud Power Amp 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 |
| TPA3107D2PAPR | 功能描述:音頻放大器 15W Stereo Class-D Audio Power Amp 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 |
| TPA3107D2PAPRG4 | 功能描述:音頻放大器 15W Stereo Class-D Audio Power Amp 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 |
| TPA3107D2PAPT | 功能描述:音頻放大器 15W Stereo Class-D Audio Power Amp 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 |
| TPA3107D2PAPTG4 | 功能描述:音頻放大器 15W Stereo Class-D Audio Power Amp 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 |
發布緊急采購，3分鐘左右您將得到回復。