參數(shù)資料
型號(hào)： TPA2005D1DRBRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝： 3 X 3 MM, GREEN, PLASTIC, SON-8
文件頁(yè)數(shù)： 6/28頁(yè)
文件大?。?/td> 993K
代理商： TPA2005D1DRBRQ1
_
+
IN–
IN+
PWM
H–
Bridge
VO+
VO–
Internal
Oscillator
CS
To Battery
VDD
GND
Bias
Circuitry
RI2
RP
Filter-Free Class D
SHUTDOWN
RI1
Single-Ended
Input 2
CI2
CP
Single-Ended
Input 1
CI1
q
JA
+
1
Derating Factor
+
1
0.016
+ 62.5
°C W
T
A
Max + TJMax * qJAPDmax + 150 * 62.5 (0.2) + 137.5°C
SLOS474C – AUGUST 2005 – REVISED MARCH 2010
www.ti.com
Figure 31. Application Schematic With TPA2005D1 Summing Two Single-Ended Inputs
EFFICIENCY AND THERMAL INFORMATION
The maximum ambient temperature depends on the heat-sinking ability of the PCB system. The derating factor
for the 2,5-mm x 2,5-mm MicroStar Junior package is shown in the dissipation rating table. Converting this to qJA:
(17)
Given qJA of 62.5°C/W, the maximum allowable junction temperature of 150°C, and the maximum internal
dissipation of 0.2 W (worst case 5-V supply), the maximum ambient temperature can be calculated with equation
(18)
Equation 18 shows that the calculated maximum ambient temperature is 137.5°C at maximum power dissipation
with a 5-V supply; however, the maximum ambient temperature of the package is limited to 85°C. Because of the
efficiency of the TPA2005D1, it can be operated under all conditions to an ambient temperature of 85°C. The
TPA2005D1 is designed with thermal protection that turns the device off when the junction temperature
surpasses 150°C to prevent damage to the IC. Also, using speakers more resistive than 8
dramatically
increases the thermal performance by reducing the output current and increasing the efficiency of the amplifier.
BOARD LAYOUT
Component Location
Place all the external components very close to the TPA2005D1. The input resistors need to be very close to the
TPA2005D1 input pins so noise does not couple on the high-impedance nodes between the input resistors and
the input amplifier of the TPA2005D1. Placing the decoupling capacitor, CS, close to the TPA2005D1 is important
for the efficiency of the class-D amplifier. Any resistance or inductance in the trace between the device and the
capacitor can cause a loss in efficiency.
Trace Width
Make the high current traces going to pins VDD, GND, VO+ and VO– of the TPA2005D1 have a minimum width of
0,7 mm. If these traces are too thin, the TPA2005D1 performance and output power will decrease. The input
traces do not need to be wide, but do need to run side-by-side to enable common-mode noise cancellation.
8-Pin QFN (DRB) Layout
Use the following land pattern for board layout with the 8-pin QFN (DRB) package. Note that the solder paste
should use a hatch pattern to fill solder paste at 50% to ensure that there is not too much solder paste under the
package.
14
Copyright 2005–2010, Texas Instruments Incorporated
Product Folder Link(s): TPA2005D1-Q1
相關(guān)PDF資料
PDF描述
TPA2005D1GQYRQ1 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA2005D1EVM 功能描述:音頻 IC 開(kāi)發(fā)工具 TPA2005D1 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
TPA2005D1GQYR 功能描述:音頻放大器 Mono Fully Diff Filter-Free Class-D 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TPA2005D1-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
TPA2005D1TDGNRQ1 功能描述:音頻放大器 1.4W Mono Fil-Free Class-D Aud Pwr 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TPA2005D1ZQYR 功能描述:音頻放大器 Mono Fully Diff Filter-Free Class-D 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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