9W+9W Analog Input Class D Speaker Amplifier - BD28412MUV

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. In addition, 2.1Ch audio system can be realized by master and slave operation without beat noise caused by interference between two ICs. Furthermore, this IC achieves lower power consumption that eliminates the need for an external heat sink.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BD28412MUV-E2 Active VQFN032V5050 2500 2500 Taping Yes
Vcc(Min.)[V] 4.5
Vcc(Max.)[V] 13.0
Speaker Amp Outputs 2.0
Speaker Amp PSRR[dB] 55.0
Speaker Amp Input Type Analog Signal
Speaker Amp Type Class D
Speaker Amp Output Power(Max.)[W] 9
Operating Temperature (Min.)[°C] -25
Operating Temperature (Max.)[°C] 85
    • 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
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Technical Data
Application Note

BD28412MUV Evaluation Board Information

Application Note

Thermal Resistance