Class-D Speaker Amplifier for Digital Input - BD5451EFV | ROHM Semiconductor - ROHM Co., Ltd. - global
Class-D Speaker Amplifier for Digital Input - BD5451EFV
BD5451EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-powerconsumption, delivers an output power of 15W+15W. 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 90% (15W+15W 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 tos a total output power of 30W. 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
Speaker Amp Outputs
Speaker Amp THD+N[%]
Speaker Amp PSRR[dB]
Speaker Amp Input Type
Speaker Amp Type
Speaker Amp Output Power(Max.)[W]
Operating Temperature (Min.)[°C]
Operating Temperature (Max.)[°C]
Features:・ This IC has one system of digital audio interface. (I2S format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs(fixed), MCLK: 256fs(fixed))
・ Low supply current at RESET mode.
・ 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. Eliminate large electrolytic-capacitors for high performance of Power Supply Rejection.
・ S/N of the system can be optimized by adjusting the gain setting among 2 steps. (20dB / 26dB)
・ Available for Monaural mode.
・ Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10～18V)
・ It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat.
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) This IC 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, (MCLK, BCLK, LRCLK))
10) Small package (HTSSOP-B28 package) contributes to reduction of PCB area.