数据搜索系统,热门电子元器件搜索 |
|
TPA6120A2 数据表(PDF) 11 Page - Texas Instruments |
|
|
TPA6120A2 数据表(HTML) 11 Page - Texas Instruments |
11 / 31 page − + RF = 1 kW VCC+ RI= 1 kW RO = 39.2 W RL VI− VCC− VI+ RI = 1 kW RF = 1 kW − + RF = 1 kW VCC+ RI = 1 kW RO = 39.2 W RL VI VCC− TPA6120A2 www.ti.com SLOS431B – MARCH 2004 – REVISED FEBRUARY 2015 Typical Application (continued) Capacitance at the outputs can cause oscillations. Capacitance from some sources, such as layout, can be minimized. Other sources, such as those from the load (for example, the inherent capacitance in a pair of headphones), cannot be easily minimized. In this case, adjustments to RO and/or RF may be necessary. The series output resistor should be kept at a minimum of 10 Ω; small enough so that the effect on the load is minimal, but large enough to provide the protection necessary such that the output of the amplifier sees little capacitance. The value can be increased to provide further isolation, up to 100 Ω. Care should be taken in selecting the thermal capacity of the output series resistor, as it will create a potential divider with the load and dissipate power. The series resistor, RS, should be used for two reasons: 1. It prevents the positive input pin from being exposed to capacitance from the line and source. 2. It prevents the source from seeing the input capacitance of the TPA6120A2. The 50 Ω resistor was chosen because it provides ample protection without interfering in any noticeable way with the signal. Not shown is another 50 Ω resistor that can be placed on the source side of RS to ground. In that capacity, it serves as an impedance match to any 50 Ω source. See Figure 15. Figure 15. Single-Ended Input With A Noninverting Gain Of –1V/V Figure 16 shows the TPA6120A2 connected with differential inputs. Differential inputs are useful because they take the greatest advantage of the high CMRR of the device. The two feedback resistor values must be kept the same, as do the input resistor values. Figure 16. Differential Input With A Noninverting Gain Of 2V/V Special note regarding mono operation: • If both amplifiers are powered on, but only one channel is to be used, the unused amplifier MUST have a feedback resistor from the output to the negative input. Additionally, the positive input should be grounded as close to the pin as possible. Terminate the output as close to the output pin as possible with a 25 Ω load to ground. • These measures should be followed to prevent the unused amplifier from oscillating. If it oscillates, and the power pins of both amplifiers are tied together, the performance of the amplifier could be seriously degraded. Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPA6120A2 |
类似零件编号 - TPA6120A2 |
|
类似说明 - TPA6120A2 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |