Class-D Speaker Amplifier for Digital Input - BD5446EFV | ROHM Semiconductor - ROHM Co., Ltd. - global
Class-D Speaker Amplifier for Digital Input - BD5446EFV
BD5446EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-powerconsumption, delivers an output power of 20W+20W. This IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD)process technology that eliminates turn-on resistance in the output power stage and internal loss due to line resistances upto an ultimate level. With this technology, the IC can achieve high efficiency of 87% (10W+10W output with 8O load). Inaddition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power consumptionand low heat generation and eliminates necessity of external heat-sink up to a total output power of 40W. This productsatisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system.
Maximum Output Gain[dB]
Digital Audio I/F
I2S / LJ
Speaker Amp Outputs
Speaker Amp THD+N[%]
Speaker Amp Input Type
Speaker Amp Type
Speaker Amp Output Power(Max.)[W]
Operating Temperature (Min.)[°C]
Operating Temperature (Max.)[°C]
Features:・ BD5446EFV has two system of digital audio interface. (I2S/LJ format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs (fixed), SYS_CLK: 256fs (fixed))
・ Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10~26V)
・ It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat.
・ S/N of the system can be optimized by adjusting the gain setting among 8 steps. (20~34dB / 2dB step)
・ It has the output power limitation function that can be adjusted to an arbitrary output power.
・ The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback circuitry of the output. In addition, a low noise and low distortion are achieved.
・ It provides with the best stereo DAC output for the headphone usage. As a result, the output of the selection of the digital input in two systems is possible.
8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off. High quality muting performance is realized by using the soft-muting technology.
9) BD5446EFV is a highly reliable design to which it has various protection functions. (High temperature protection, Under voltage protection, Output short protection, Output DC voltage protection and Clock stop protection)