- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98165 > TAS5719PHPR (TEXAS INSTRUMENTS INC) 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 PDF資料下載
參數(shù)資料
| 型號： | TAS5719PHPR |
| 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, PQFP48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, HTQFP-48 |
| 文件頁數(shù)： | 13/67頁 |
| 文件大小： | 1043K |
| 代理商： | TAS5719PHPR |
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頁第11頁第12頁當前第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頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁
SLOS655A
– NOVEMBER 2010 – REVISED FEBRUARY 2011
DETAILED DESCRIPTION
POWER SUPPLY
To facilitate system design, the TAS5717/9 needs only a 3.3-V supply in addition to the (typical) 13-V
power-stage supply. An internal voltage regulator provides suitable voltage levels for the gate drive circuitry.
Additionally, all circuitry requiring a floating voltage supply, e.g., the high-side gate drive, is accommodated by
built-in bootstrap circuitry requiring only a few external capacitors.
In order to provide good electrical and acoustical characteristics, the PWM signal path for the output stage is
designed as identical, independent half-bridges. For this reason, each half-bridge has separate bootstrap pins
(BST_X) and power-stage supply pins (PVDD_X). The gate drive voltages (GVDD_AB and GVDD_CD) are
derived from the PVDD voltage. Special attention should be paid to placing all decoupling capacitors as close to
their associated pins as possible. In general, inductance between the power-supply pins and decoupling
capacitors must be avoided.
For a properly functioning bootstrap circuit, a small ceramic capacitor must be connected from each bootstrap pin
(BST_X) to the power-stage output pin (OUT_X). When the power-stage output is low, the bootstrap capacitor is
charged through an internal diode connected between the gate-drive regulator output pin (GVDD_X) and the
bootstrap pin. When the power-stage output is high, the bootstrap capacitor potential is shifted above the output
potential and thus provides a suitable voltage supply for the high-side gate driver. In an application with PWM
switching frequencies in the range from 352 kHz to 384 kHz, it is recommended to use 33-nF ceramic capacitors,
size 0603 or 0805, for the bootstrap supply. These 33-nF capacitors ensure sufficient energy storage, even
during minimal PWM duty cycles, to keep the high-side power stage FET (LDMOS) fully turned on during the
remaining part of the PWM cycle.
Special attention should be paid to the power-stage power supply; this includes component selection, PCB
placement, and routing. As indicated, each half-bridge has independent power-stage supply pins (PVDD_X). For
optimal electrical performance, EMI compliance, and system reliability, it is important that each PVDD_X pin is
decoupled with a 100-nF ceramic capacitor placed as close as possible to each supply pin.
The TAS5717/9 is fully protected against erroneous power-stage turnon due to parasitic gate charging.
I
2C CHIP SELECT/HP_SHUTDOWN
A_SEL/HP_SD is an input pin during power up. It can be pulled high or low. HIGH indicates an I2C subaddress
of 0x56, and LOW a subaddress of 0x54.
DEVICE PROTECTION SYSTEM
Overcurrent (OC) Protection With Current Limiting
The device has independent, fast-reacting current detectors on all high-side and low-side power-stage FETs. The
detector outputs are closely monitored a protection system. If the high-current condition situation persists, i.e.,
the power stage is being overloaded, a protection system triggers a latching shutdown, resulting in the power
stage being set in the high-impedance (Hi-Z) state. The device returns to normal operation once the fault
condition (i.e., a short circuit on the output) is removed. Current limiting and overcurrent protection are not
independent for half-bridges. That is, if the bridge-tied load between half-bridges A and B causes an overcurrent
fault, half-bridges A, B, C, and D are shut down.
Overtemperature Protection
The TAS5717/9 has an overtemperature-protection system. If the device junction temperature exceeds 150
°C
(nominal), the device is put into thermal shutdown, resulting in all half-bridge outputs being set in the
high-impedance (Hi-Z) state and FAULT being asserted low. The TAS5717/9 recovers automatically once the
temperature drops approximately 30
°.
20
2010–2011, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TAS5719PHP | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TB1212N | SPECIALTY CONSUMER CIRCUIT, PDIP64 |
| TB1212F | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TB1226DNG | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
| TB1226DN | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS5720LRSMT | 功能描述:Amplifier IC 1-Channel (Mono) Class D 32-VQFN (4x4) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:D 類 輸出類型:1-通道（單聲道） 不同負載時的最大輸出功率 x 通道數(shù):20W x 1 @ 4 歐姆 電壓 - 電源:4.5 V ~ 16.5 V 特性:消除爆音，短路和熱保護 安裝類型:表面貼裝 工作溫度:-25°C ~ 85°C（TA） 供應(yīng)商器件封裝:32-VQFN（4x4） 封裝/外殼:32-VFQFN 裸露焊盤 標準包裝:1 |
| TAS5720MEVM | 功能描述:TAS5720M - 1-Channel (Mono) Output Class D Audio Amplifier Evaluation Board 制造商:texas instruments 系列:- 零件狀態(tài):有效 放大器類型:D 類 輸出類型:1-通道（單聲道） 不同負載時的最大輸出功率 x 通道數(shù):15W x 1 @ 4 歐姆 電壓 - 電源:4.5 V ~ 26.4 V 板類型:完全填充 使用的 IC/零件:TAS5720M 所含物品:板 標準包裝:1 |
| TAS5720MRSMT | 功能描述:Amplifier IC 1-Channel (Mono) Class D 32-VQFN (4x4) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:D 類 輸出類型:1-通道（單聲道） 不同負載時的最大輸出功率 x 通道數(shù):20W x 1 @ 4 歐姆 電壓 - 電源:4.5 V ~ 26.4 V 特性:消除爆音，短路和熱保護 安裝類型:表面貼裝 工作溫度:-25°C ~ 85°C（TA） 供應(yīng)商器件封裝:32-VQFN（4x4） 封裝/外殼:32-VFQFN 裸露焊盤 標準包裝:1 |
| TAS5721 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Digital Audio Power Amplifier with EQ, DRC, 2.1 Support, and Headphone/Line Driver |
| TAS5721DCA | 功能描述:音頻放大器 15W Stereo Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fā)布緊急采購，3分鐘左右您將得到回復(fù)。