参数资料
型号: TPA2008D2PWPRG4
厂商: Texas Instruments
文件页数: 4/26页
文件大小: 0K
描述: IC AMP AUDIO PWR 3W STER 24TSSOP
标准包装: 2,000
类型: D 类
输出类型: 2 通道(立体声)
在某负载时最大输出功率 x 通道数量: 3W x 2 @ 3 欧姆
电源电压: 4.5 V ~ 5.5 V
特点: 消除爆音,差分输入,短路和热保护,关机,音量控制
安装类型: 表面贴装
供应商设备封装: 24-HTSSOP
封装/外壳: 24-TSSOP(0.173",4.40mm)裸露焊盘
包装: 带卷 (TR)
配用: 296-18922-ND - EVAL MODULE FOR TPA2008D2
www.ti.com
TRADITIONAL CLASS-D MODULATION SCHEME
0 V
5 V
+5 V
Current
OUTP
Differential Voltage
Across Load
OUTN
TPA2008D2
SLOS413C – JULY 2003 – REVISED MAY 2004
APPLICATION INFORMATION (continued)
The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output
where each output is 180 degrees out of phase and changes from ground to the supply voltage, VCC. Therefore,
the differential prefiltered output varies between positive and negative VCC, where filtered 50% duty cycle yields 0
V across the load. The traditional class-D modulation scheme with voltage and current waveforms is shown in
Figure 14. Note that even at an average of 0 V across the load (50% duty cycle), the current to the load is high,
resulting in a high I2R loss, thus causing a high supply current.
Figure 14. Traditional Class-D Modulation Scheme's Output Voltage and Current Waveforms Into an
Inductive Load With No Input
12
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