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參數(shù)資料
| 型號： | TPA0223DGQR |
| 英文描述： | Switches, Toggle; Circuitry:SPDT; Switch Operation:On-None-On; Current Rating:2A; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Switch Function:SPDT |
| 中文描述： | 音頻放大器|單|的CMOS | TSSOP封裝| 10PIN |塑料 |
| 文件頁數(shù)： | 40/42頁 |
| 文件大?。?/td> | 806K |
| 代理商： | TPA0223DGQR |
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TPA0202
2-W STEREO AUDIO POWER AMPLIFIER
SLOS205B – FEBRUARY 1998 – REVISED DECEMBER 2000
40
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
headroom and thermal considerations (continued)
T
A
Max
T
J
Max
150
Θ
JA
P
D
45(0.6
2)
96
°
C (15 dB headroom, 0 CFM)
(20)
NOTE:
Internal dissipation of 0.6 W is estimated for a 2-W system with 15 dB headroom per channel.
Table 4 shows that for some applications no airflow is required to keep junction temperatures in the specified
range. The TPA0202 is designed with thermal protection that turns the device off when the junction temperature
surpasses 150
°
C to prevent damage to the IC. Table 4 was calculated for maximum listening volume without
distortion. When the output level is reduced the numbers in the table change significantly. Also, using 8-
speakers dramatically increases the thermal performance by increasing amplifier efficiency.
junction temperature measurement
Characterizing a PCB layout with respect to thermal impedance is very difficult, as it is usually impossible to
know the junction temperature of the IC in question. The TPA0202 terminal 2 (TJ) sources a current proportional
to the junction temperature. The circuit internal to TJ is shown in Figure 70.
5R
TJ
VDD
R
R
Figure 70. TJ Terminal Internal Circuit
Connect an ammeter between TJ and ground to measure the current. As the resistors have a tolerance of
±
20%,
this measurement must be calibrated on each device. The intent of this function is in characterization of the PCB
and end equipment and not a real-time measurement of temperature. Typically a 25
°
C reading is –120
μ
A for
a 3.3-V supply and –135
μ
A for a 5-V supply. The slope is approximately 0.25
μ
A/
°
C for both V
DD
= 3.3 V and
V
DD
= 5 V. To reduce quiescent current, do not ground TJ in normal operation. It can be connected to V
DD
or
left floating as it has a resistor connected across the base-emitter junction.
相關PDF資料 |
PDF描述 |
|---|---|
| TPA0232PWPR | Switches, Toggle; Circuitry:SPDT; Switch Operation:On-None-(On); Contact Current Max:3A; Actuator Style:Bat; Current Rating:3A@120VAC or 29VDC; Leaded Process Compatible:Yes; Operating Temp. Min:-30 C |
| TPA0233DGQR | AUDIO AMPLIFIER|DUAL|CMOS|TSSOP|10PIN|PLASTIC |
| TPA0242PWPR | SWITCH, PCB DPDT |
| TPA0243DGQR | Toggle Switch,RIGHT ANGLE,DPDT,ON-ON,WP STRAIGHT Terminal,TOGGLE BAT,PCB Hole Count:7 |
| TPA0252PWPR | Toggle |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0223DGQRG4 | 功能描述:音頻放大器 2W Mono 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA0223EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0223 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA0232 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO 2-W AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL AND MUX CONTROL |
| TPA0232EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0232 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA0232PWP | 功能描述:音頻放大器 2W Stereo 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 |
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