BD3811K1 - 6-Channel 5.1ch Sound Processor | ROHM
Référence : BD3811K1 ✓ ActifBD3811K1 Présentation
A sound processor is a dedicated audio-system IC that controls routing, level, tone, and channel-mixing functions before signals reach power amplifiers and loudspeakers. The BD3811K1 belongs to the broader hierarchy of audio special-purpose ICs, audio signal processors, analog and mixed-signal semiconductors, and integrated circuits. Its 5.1ch orientation means that one front-left, front-right, center, surround-left, surround-right, and subwoofer channel can be managed from a dedicated processor.
The verified manufacturer datasheet identifies the BD3811K1 and BD3818KS as 5.1ch sound processors with built-in mode and input selectors. For BD3811K1, the integrated functions include 6-channel volume, gain amplifier, bass, treble, mixing through the family architecture, and bass boost. These functions reduce the number of separate analog controls required in a home-theater receiver or powered-speaker system. The available operating-supply indication is 10 V to 14.6 V, supporting conventional internal analog rails found in multichannel audio equipment.
The BD3811K1 is identified by distributors as an audio tone processor in the 80-QFP (20 x 14 mm) package. Its pinout, exact control-voltage ranges, signal-frequency limits, total harmonic distortion, noise specifications, and recommended external-component values are not included in the supplied verified dataset. Those values must be taken directly from the manufacturer datasheet before signal-path or thermal calculations are approved.
Typical uses include home-theater preamplifiers, 5.1ch surround-sound receivers, powered multimedia speakers, and analog multichannel source systems. The integrated bass, treble, volume, gain, and bass-boost blocks are particularly useful where a shared system-level tone controller is preferable to discrete analog networks. The input and mode selectors can also simplify source routing, although the exact supported modes and input count require confirmation from the datasheet.
When designing around the BD3811K1, treat the audio paths, control inputs, supply rails, and ground returns as an analog system rather than as generic digital logic. Keep input and output routing away from switching supplies and high-current amplifier outputs, provide local supply bypassing according to the manufacturer application circuit, and verify the PCB footprint against the 80-QFP drawing before release.
This page consolidates the verified distributor listings, manufacturer-hosted PDF, package information, supply-voltage indication, pricing signal, and practical selection guidance for BD3811K1. It also distinguishes confirmed data from parameters that still require verification from the official datasheet, reducing the risk of designing from an incomplete substitute listing.
Alternatives de remplacement direct pour BD3811K1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesBD3811K1 Valeurs maximales et caractéristiques électriques
| Product Type | 5.1ch sound processor |
| Audio Channel Count | 6 channels |
| Tension d'alimentation de fonctionnement | 10 V to 14.6 V |
| Integrated Functions | Mode selector, input selector, 6-channel volume, gain amplifier, bass, treble, and bass boost |
| Processor Category | Audio tone processor |
| Package Type | 80-QFP (20 mm x 14 mm) |
| Type de montage | Surface mount |
| Nombre de broches | 80 pins |
| Signal Channels | Front left, front right, center, surround left, surround right, and subwoofer |
| Tone Controls | Bass and treble |
| Level Control | 6-channel volume control |
| Amplification Function | Gain amplifier |
| Low-Frequency Function | Bass boost |
| Source Routing | Built-in mode selector and input selector |
| Application Class | Home-theater sound processing |
Guide de configuration des broches du BD3811K1 80-qfp (20 mm x 14 mm)
Configuration des broches du BD3811K1 (boîtier 80-qfp (20 mm x 14 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour BD3811K1.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
BD3811K1 convient pour 6 applications: Home-Theater Surround-Sound Receiver, Powered 5.1ch Multimedia Speakers, Analog Multichannel Source Selector, Surround-Sound Preamplifier Control Board, 5.1ch Karaoke and AV Mixer, Home Cinema Speaker System Controller.
Home-Theater Surround-Sound Receiver
The BD3811K1 fits the preamplifier and control section of a 5.1ch home-theater receiver because it integrates 6-channel volume control, a gain amplifier, bass, treble, bass boost, mode selection, and input selection into one processor. It can centralize level and tone control for front-left, front-right, center, surround-left, surround-right, and subwoofer paths before power-amplifier stages. The verified 10 V to 14.6 V operating range suits internally powered analog audio equipment. Before schematic release, confirm every signal input, output, control voltage, and filter value in the manufacturer datasheet.
Recommandé
Powered 5.1ch Multimedia Speakers
A powered multimedia-speaker system can use the BD3811K1 as a shared analog control processor for six amplified channels. Its integrated volume, gain, bass, treble, and bass-boost functions reduce the need for separate tone-control networks, while the built-in input and mode selectors help route multiple source signals. The device operates from 10 V to 14.6 V, making its supply requirements compatible with common internal audio rails. Engineers should verify channel signal levels, control ranges, recommended capacitors, and ground-return strategy from the official datasheet before fixing the board layout.
Recommandé
Analog Multichannel Source Selector
BD3811K1 is appropriate for an analog multichannel source selector that must switch among home-theater inputs while maintaining common level and tone behavior. Its built-in mode and input selectors consolidate routing control, while the integrated 6-channel volume and gain blocks can provide consistent signal conditioning across the selected source. The trade-off is that exact mode count, input impedance, insertion loss, and switching behavior are not stated in the supplied verified data. Those values must be validated from the manufacturer PDF before this block is treated as a standalone source switch.
Recommandé
Surround-Sound Preamplifier Control Board
The integrated control functions make BD3811K1 useful in a dedicated surround-sound preamplifier board positioned ahead of external power amplifiers. Six-channel volume and shared bass and treble controls provide a consistent user interface, while gain and bass boost support flexible calibration of the home-theater signal path. Its 80-QFP, 20 mm by 14 mm package offers a substantial number of external pins for the multichannel connections. Because detailed distortion, noise, and control-voltage data were not included in the verified results, those parameters require confirmation before committing to a high-performance design.
Recommandé
5.1ch Karaoke and AV Mixer
The BD3811K1 can support a compact 5.1ch AV or karaoke mixer when multiple analog sources require common volume, gain, and tone management. Six-channel volume is particularly relevant to maintaining predictable relative levels across main, center, surround, and subwoofer outputs, while bass boost provides a user-selectable low-frequency adjustment. Mode and input selection can simplify source choice around the mixer. Signal-headroom analysis must use the verified gain-control and distortion specifications, which are not present in the supplied dataset and must be taken from the manufacturer datasheet.
Recommandé
Home Cinema Speaker System Controller
BD3811K1 can centralize control in a home-cinema speaker system controller that combines several analog inputs and drives six external amplifier channels. The built-in input and mode selectors shorten system-control design, while bass, treble, bass boost, volume, and gain functions provide user-adjustable acoustic adjustment in one IC. Its confirmed 10 V to 14.6 V supply range is suitable for conventional internal rails, but the designer still needs the official package drawing, pin map, recommended application circuit, and thermal data. Do not infer exposed-pad requirements from distributor package names alone.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour BD3811K1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Notes de conception
Verify the 80-QFP, 20 mm by 14 mm land pattern and all pin assignments against the manufacturer datasheet before PCB release. The supplied data confirms the package dimensions and pin count but does not provide the individual pin names, so no pin-level netlist should be inferred from secondary listings. Keep analog input, output, and control traces away from switching-regulator nodes and high-current amplifier outputs, and preserve the manufacturer's recommended ground topology.
The confirmed operating-supply range is 10 V to 14.6 V. Place local bypass capacitors at the supply pins according to the official application circuit and keep the return path short, but do not assign capacitor values without consulting the datasheet. Check startup behavior, supply ripple, and permitted input voltage under worst-case rail conditions. This is an analog audio control IC, so supply and ground cleanliness can affect the signal path even though it does not directly drive loudspeakers.
Do not treat BD3818KS as an automatic drop-in substitute for BD3811K1. The verified family description distinguishes the two devices by mixing and dynamic bass boost functions, and no pin-to-pin equivalence was established. Also avoid substituting unverified values for distortion, noise, bandwidth, control ranges, thermal resistance, or operating temperature. Obtain the manufacturer PDF and compare every board-critical parameter, especially pinout, supply, controls, and external filter components.
Informations de conformité
The supplied verified web results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Current ROHM product documentation should be reviewed before making a compliance declaration.
