ROHM Manuals

BD5466GUL is a single-channel Class-D speaker amplifier with ALC function for mobile phones, portable electronic devices, etc.

BD5471MUV is a low voltage drive class-D stereo speaker amplifier that was developed for note-book PC, cellular phone, mobile audio products and the others. It is unnecessary for LC filters of speaker outputs. Only 7 external components are needed for speaker system. Also, 3.3V regulator in BD5471MUV can use power supply for audio-codec. BD5471MUV, that is high-efficiency, low consumption, is suitable for application by using battery. Shutdown current is 0µA 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”.

The BD7830NUV is a monaural speaker amplifier developed by ROHM for use in portable navigation and mobile audio products. It operates at low voltage and consumes 0µA in standby mode. It also switches quickly and quietly from standby to ON, making it ideal for applications where there is frequent switching between standby and ON.

This document is the datasheet of BD7836EFV. BD7836EFV is a Class-AB stereo speaker amplifier, suitable for notebook PC, desktop PC, portable devices and others.

The document introduces ROHM's BD88xxxGUL series headphone amplifiers, which are designed with no output coupling capacitor, with an output voltage range of +2.4V to +5.5V, no need for a large-capacity output coupling capacitor, no influence of output load resistance on low-frequency response, virtual ground-referenced output, low distortion and low power consumption, integrated negative power supply, integrated short-circuit protection and thermal overload protection, and small package.

BD88xxxGUL is an output coupling capacitorless headphone amplifier. This IC has a built-in regulated type negative voltage generator and generates the direct regulated negative voltage from the supply voltage. It is possible to drive headphones in a ground standard with both voltage of the positive voltage (+2.4V) and the negative voltage (-2.4V). Therefore a large-capacity output coupling capacitor becomes needless and can reduce a cost, a board area, and the height of the part. In addition, there is not the signal decrement by the low range to happen by output coupling capacitor and output load impedance and can output a rich low tone.

The BD3816K1 and BD3817KS are 6.1ch sound processors. Functions required for applications, such as AV receivers and home theater systems, are integrated into a single chip. A wide dynamic range of 132dB is achieved by utilizing the BiCMOS process.

BD3814FV is a one-chip sound processor that integrates functions such as volume, bass, and treble, necessary for AV receivers, home theater systems, and mini-audio systems.

BD3813KS/BD3815KS is a 5.1-channel audio processor from ROHM that integrates an amplifier and volume/bass/treble controls, making it ideal for use in audio applications such as AV receivers, home theater systems, and mini-component systems.

BD3812F is an electronic volume control with volume, gain amplifier functions necessary for applications in AV receivers, home theatre systems, min-component systems and so forth.

BD3811K1 and BD3818KS are 5.1ch sound processors, with built-in Mode Selector/Input Selector. Functions, including 6-ch Volume, Gain Amp, Bass, Treble, Mixing (BD3818KS), Dynamic Bass Boost (BD3818KS) and Bass Boost (BD3811K1) are integrated into a single chip.

This is a car audio sound processor with low power, low energy design features, can be controlled by I2C BUS control 3-band equalizer, support 1 dB step gain adjustment

BD37524FS is a sound processor built-in 3-band equalizer for car audio. It has functions of stereo 5ch input selector, input-gain control, main volume, loudness, 5ch fader volume, LPF for subwoofer, level meter. The advanced switch circuit can reduce various switching noise.