BD28412MUV
9W+9W模拟输入立体声D类扬声器放大器
BD28412MUV
9W+9W模拟输入立体声D类扬声器放大器
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。
主要规格
特性：
Grade
Standard
Circuit Type
Class D
Number of Ch
2/1(Analog)
Speaker Amp Output Power(Max.)[W]
9
Gain [dB]
20/26/32/36
Maximum Output [W,RL=8Ω]
(9+9)/18
Minimum Load [Ω]
6/4
Input Type
Differential
Stand-by Current [µA]
0.1
Power Supply Voltage (Min.) [V]
4.5
Power Supply Voltage (Max.) [V]
13
Operating Temperature (Min.)[°C]
-25
Operating Temperature (Max.)[°C]
85
特点：
- 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
Reference Design / Application Evaluation Kit
-
- Evaluation Board - BD28412MUV-EVK-001
BD28412MUV is a 9W+9W stereo (or 18W monaural) class D amplifier, developed for battery equipped speaker systems such as wireless speakers. This IC is incorporated with a precise oscillator to generate multiple switching frequencies that can avoid the AM radio interference.
