- 您现在的位置：买卖IC网 > PDF目录98276 > TPA6203A1GQV (TEXAS INSTRUMENTS INC) 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 PDF资料下载
参数资料
| 型号： | TPA6203A1GQV |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封装： | PLASTIC, BGA-8 |
| 文件页数： | 7/19页 |
| 文件大小： | 214K |
| 代理商： | TPA6203A1GQV |
TPA6203A1
SLOS364 – MARCH 2002
www.ti.com
15
Table 2. Efficiency and Maximum Ambient Temperature vs Output Power in 5-V 8-
BTL Systems
Output Power
(W)
Efficiency
(%)
Internal Dissipation
(W)
Power From Supply
(W)
Max Ambient Temperature
(
°C)
0.25
31.4
0.55
0.75
87
0.50
44.4
0.62
1.12
78
1.00
62.8
0.59
1.59
82
1.25
70.2
0.53
1.78
89
Table 2 employs equation 7 to calculate efficiencies for
four different output power levels. Note that the efficiency
of the amplifier is quite low for lower power levels and rises
sharply as power to the load is increased resulting in a
nearly flat internal power dissipation over the normal
operating range. Note that the internal dissipation at full
output power is less than in the half power range.
Calculating the efficiency for a specific system is the key
to proper power supply design. For a 1.25-W audio system
with 8-
loads and a 5-V supply, the maximum draw on the
power supply is almost 1.8 W.
A final point to remember about Class-AB amplifiers is how
to manipulate the terms in the efficiency equation to the
utmost advantage when possible. Note that in equation 7,
VDD is in the denominator. This indicates that as VDD goes
down, efficiency goes up.
A simple formula for calculating the maximum power
dissipated, PDmax, may be used for a differential output
application:
P
Dmax +
2V2
DD
p2R
L
PDmax for a 5-V, 8- system is 634 mW.
The maximum ambient temperature depends on the heat
sinking ability of the PCB system. The derating factor for
the 2 mm x 2 mm Microstar Junior
package is shown in
the dissipation rating table (see page 2). Converting this to
ΘJA:
Θ
JA +
1
Derating Factor
+
1
0.088
+ 113°C W
Given
ΘJA, the maximum allowable junction temperature,
and the maximum internal dissipation, the maximum
ambient temperature can be calculated with the following
equation.
The
maximum
recommended
junction
temperature for the TPA6203A1 is 150
°C.
T
A Max + TJ Max * ΘJA PDmax
+ 150 * 113(0.634) + 78.4°C
Equation
10
shows
that
the
maximum
ambient
temperature is 78.4
°C at maximum power dissipation with
a 5-V supply.
Table 2 shows that for most applications no airflow is
required to keep junction temperatures in the specified
range. The TPA6203A1 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 more resistive than 8-
speakers
dramatically increases the thermal performance by
reducing the output current.
(8)
(9)
(10)
相关PDF资料 |
PDF描述 |
|---|---|
| TPA6203AIDGN | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA6203AIDRB | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA6204A1DGN | 1.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA6205A1DGN | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA6205A1DRBR | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA6203A1GQVR | 功能描述:音频放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA6203A1ZQVR | 功能描述:音频放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA6203A1ZQVRG1 | 功能描述:音频放大器 1.25W Mon,Fully Diff Class-AB Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA6204A1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:1.7W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
| TPA6204A1_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:1.7W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
发布紧急采购，3分钟左右您将得到回复。