Analog Input Monaural Class-D Speaker Amplifier - BD5634NUX

BD5634NUX is a low voltage drive class-D monaural speaker amplifier that was developed for cellular telephones, mobile audio products and the others. The LC filter of the speaker output is unnecessary and only 3 external components are needed by fixed gain 12dB. Because the efficiency is high and is low consumption power with the class-D operation, it is the optimal for the application of the battery drive. Also Current consumption of 0µA when standby and fast transitions from standby to active with little pop noise make it is suitable for applications that switch repeatedly between suspended and active.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD5634NUX-TR Active VSON008X2030 4000 4000 Taping Yes
Vcc(Min.)[V] 2.5
Vcc(Max.)[V] 5.5
Iq[mA] 2.7
Ext. Gain No
Maximum Output Gain[dB] 12.0
Speaker Amp Outputs 1.0
Speaker Amp THD+N[%] 0.1
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] 2.5
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・ No LC filter required
    ・ Only 3 external components
    ・ High power 2.5W / 4Ω / BTL (VDD=5V, RL=4Ω, THD+N=10%)
    ・ High power 0.85W / 8Ω / BTL (VDD=3.6V, RL=8Ω, THD+N=10%)
    ・ Gain 12dB
    ・ Analog differential input / PWM digital output
    ・ Pop noise suppression circuit
    ・ Built-in standby function
    ・ Protection circuit (Short protection [Auto recover without power cycling], Thermal shutdown, Under voltage lockout)
    ・ Small package 8pin VSON
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Technical Data
Application Note

BD5634NUX Evaluation Board Information

Application Note

Thermal Resistance