Analog Input / BTL Output Class-D Speaker Amplifier - BD5423MUV

BD5423MUV is a 17W + 17W stereo class-D power amplifier IC, developed for space-saving and low heat-generationapplications such as low-profile TV sets. The IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD) process technologythat eliminates turn-on resistance in the output power stage and internal loss due to line resistances up to an ultimate level.With this technology, the IC has achieved high efficiency of 90% (10W + 10W output with 8O load), which is the top class in theindustry. The IC, in addition, employs a compact back-surface heat radiation type power package to achieve low powerconsumption and low heat generation and eliminates necessity of installing an external radiator, up to a total output of 34W.This product satisfies both needs for drastic downsizing, low-profile structures and powerful, high-quality playback of thesound system.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD5423MUV-E2 Active VQFN048V7070 1500 1500 Taping Yes
Vcc(Min.)[V] 10.0
Vcc(Max.)[V] 16.5
Iq[mA] 25.0
Ext. Gain No
Maximum Output Gain[dB] 28.0
I/F Stand alone
Additional Feature Soft clip
Speaker Amp Outputs 2.0
Speaker Amp THD+N[%] 0.1
Speaker Amp Input Type Analog Signal
Speaker Amp Type Class D
Speaker Amp Output Power(Max.)[W] 17
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・ A high efficiency of 90% (10W + 10W output with 8Ω load), which is the highest grade in the industry and low heat-generation.
    ・ An output of 17W + 17W (12V, with 4Ω load) is allowed without an external heat radiator.
    ・ Driving a lowest rating load of 4Ω is allowed.
    ・ Pop noise upon turning power on/off and power interruption has been reduced.
    ・ High-quality audio muting is implemented by soft-switching technology.
    ・ An output power limiter function limits excessive output to speakers.
    ・ High-reliability design provided with built-in protection circuits against high temperatures, against VCC shorting and GND shorting, against reduced-voltage, and against applying DC voltage to speaker.
    8) A master/slave function allowing synchronization of multiple devices reduces beat noises.
    9) Adjustment of internal PWM sampling clock frequencies (250kHz to 400kHz) allows easy protective measures against unwanted radio emission to AM radio band.
    10) A compact back-surface heat radiation type power package is employed.
    VQFN048V7070 7.0mm × 7.0mm × 1.0mm, pitch 0.5mm
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Technical Data
Application Note

BD5423MUV Evaluation Board Information

Application Note

Thermal Resistance