Analog Input Stereo Class-D Speaker Amplifiers - BD5471MUV

BD5471MUV is a low voltage drive class-D stereo speaker amplifier that was developed for cellular telephones, mobile audio products and the others. LC filters of speaker outputs are unnecessary, and only 7 external components are needed for speaker system. Also, 3.3V regulator in BD5471MUV can use power supply for audio-codec. Efficiency of BD5471MUV is higher than class-AB amplifier, and BD5471MUV can make battery life longer than class-AB. Shutdown current is 0uA typically. Also, start-up time is fast from shutdown to active mode. BD5471MUV can use for some applications that change mode between "shutdown state" and "active state".

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* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BD5471MUV-E2 Active VQFN024V4040 2500 2500 Taping Yes
Vcc(Min.)[V] 4.5
Vcc(Max.)[V] 5.5
Iq[mA] 5.5
Ext. Gain No
Maximum Output Gain[dB] 24.0
Speaker Amp Outputs 2.0
Speaker Amp THD+N[%] 0.2
Speaker Amp SNR[dB] -98.0
Speaker Amp PSRR[dB] 53.0
Speaker Amp Input Type Differential Single
Speaker Amp Type Class D
Speaker Amp Output Power(Max.)[W] 2.3
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・High power 2.3W (VDD=5V, RL=4Ω, THD+N=10%)
    ・High power 1.5W (VDD=5V, RL=8Ω, THD+N=10%)
    ・Gain selectable by the external control (6, 12, 18, 24dB)
    ・Pop noise suppression circuitry
    ・Standby function (Mute function) [ISD=0uA]
    ・Protection circuitry (Short protection [Audio, REG], Thermal shutdown, Under voltage lockout)
    ・Built-in 3.3V regulator
    ・Built-in BEEP detect circuitry
    ・Very small package VQFN024V4040
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Technical Data
Application Note

BD5471MUV Evaluation Board Information

Application Note

Thermal Resistance