CXAB4125 CXAB4126是AB类音频功率放大器，专为手机和其他便携式通信设备设计。它能够为8ΩBTL负载提供1.2瓦的连续平均功率5VDC电源的失真小于1%（THD+N）。CXAB4125 CXAB4126是专门为提供高质量的输出功率而设计的，只需少量的外部组件。它不需要输出耦合电容或自举电容。用超低的关断电流，CXAB4125 CXAB4126非常适合移动电话和其他低电压应用，其中最低功耗是一个主要要求。通过特殊的弹出式点击消除电路，CXAB4125 CXAB4126在打开和关闭过渡。CXAB4125 CXAB4126是单位增益稳定的，可以由外部配置增益设置电阻器。
◆在217 Hz 70dB下改善PSRR
◆5.0V，1%THD+N，8Ω1.2W（典型值）时的功率输出
◆3.0V、1%THD+N、8Ω400 mW（典型值）时的功率输出
？？超低关断电流0.1uA（典型值）
◆2.2V–5.5V操作
◆改进的电路消除了开关转换过程中的点击噪声◆出色的射频干扰（RFI）抗扰度
◆无需输出耦合电容器、缓冲网络或自举电容器
◆单位增益稳定
◆外部增益配置能力
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[ CXAB4125 ]
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
The CXAB4125 CXAB4126 is a Class-AB audio power amplifier designed for mobile phones and other portable communication devices. It is capable of delivering 1.2 watts of continuous average power to an 8Ω BTL load withless than 1% distortion (THD+N) from a 5VDC power supply.
The CXAB4125 CXAB4126 was designed specifically to provide high quality output power with a minimal amount of external components. It does not require output coupling capacitors or bootstrap capacitors. And with ultra low shutdown current, the CXAB4125 CXAB4126 is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. With special pop-click eliminating circuit, the
CXAB4125 CXAB4126 provides perfect pop-click characteristic during turn-on and turn-off transitions.
The CXAB4125 CXAB4126 is unity-gain stable and can be configured by external gain-setting resistors.
二.产品特点
◆Improved PSRR at 217 Hz 70dB
◆Power output at 5.0V, 1% THD+N, 8Ω 1.2W (typ.)
◆Power output at 3.0V, 1% THD+N, 8Ω 400 mW (typ.)
◆Ultra low shutdown current 0.1 uA (typ.)
◆2.2V – 5.5V operation
◆Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions ◆Excellent RFI (Radio Frequency Interference) immunity
◆No output coupling capacitors, snubber networks or bootstrap capacitors required
◆Unity-gain stable
◆External gain configuration capability
◆Available in space-saving package: NLGA9L
三.应用范围
◆Wireless handsets
◆Portable electronic devices
◆PDAs, Handheld computers
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
| AB类音频功放电路(Class AB Audio Amplifier) | ||||||
| Part No. | Features | Output | PSRR | VDD | Package | Applications |
| CXAB4123 | Low Power Audio Amplifier | 400mW | 2~16V | SOP8 TSSOP8 | -2 | |
| CXAB4124 | Audio Power Amplifier | 1.1W | 60dB | 2.2~5.5V | MSOP8 SOP8 | (1)(4)(11) |
| CXAB4125 | Audio Power Amplifier | 1.2W | 70dB | 2.2~5.5V | NLGA9L | (1) (3) |
| CXAB4126 | Audio Power Amplifier | 1.3W | 68dB | 2.2~5.5V | CSP9 MSOP8 DFN8 | (1) (3) |
| CXAB4127 | Audio Power Amplifier | 1.6W | 60dB | 2.2~5.5V | SOP8 | (8)(12) |
| CXAB4128 | Audio Power Amplifier Plus Stereo Headphone Function | 2.2 W x 2 | 73dB | 2~5.5V | TSSOP20 DIP16 SOP16 | (5) (6) (8) (9) |
| CXAB4128B | Audio Power Amplifier Plus Stereo Headphone Function | 2.5 W x 2 | 60dB | 2~5.5V | SOP16 | -7 |
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