BD28412MUV中文资料9W+9W模拟输入立体声D类扬声器放大器数据手册ROHM规格书

描述 Description

本IC不使用散热片，是可通过立体声BTL进行9W+9W输出或通过单声道PBTL进行18W输出的立体声D类扬声器放大器。内置高精度振荡器，为避免与AM无线电干扰，可选择多个开关频率。此外，可选择主/从模式，因此无需在意差拍噪声，即可实现使用2个IC的2.1Ch音响系统。实现了小输出时的低功耗，是适用于无线扬声器等搭载电池的扬声器系统的立体声D类扬声器放大器。

特性 Features

• Analog Differential Input
• Low Standby Current
• Output Feedback Circuitry Prevents Sound Quality Degradation Caused by Power Supply Voltage Fluctuation, Achieves Low Noise and Low Distortion, Eliminates the Need of Large Electrolytic-Capacitors for Decoupling
• Power Limit Function (Linearly-programmable)
• Selectable Switching Frequency
(AM Avoidance Function)
• Synchronization Control is Supported
(Selectable Master and Slave Operation)
• Parallel BTL (PBTL) is Supported
• Wide Voltage Range (VCC=4.5V to 13V)
• High Efficiency and Low-heat-generation Make the System Smaller, Thinner, and More Power-saving
• Pop Noise Prevention During Power Supply ON/OFF
• High Reliability Design by Built-in Protection Circuits
• Overheat Protection
• Under Voltage Protection
• Output Short Protection
• Output DC Voltage Protection

• Small Package (VQFN032V5050) Achieves Mount Area Reduction