SI8244BB-D-IS1 - 2-Channel Isolated Class-D Audio Driver
MPN: SI8244BB-D-IS1 ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $2.7923 | $2.79 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI8244BB-D-IS1 Overview
A Class-D audio driver is a semiconductor interface that controls the switching devices in a Class-D power amplifier. It translates a control signal into suitable high-side and low-side gate-drive signals, helping the amplifier produce high-fidelity audio efficiently. The Si824x family is specifically designed for high-power audio applications, with the Si8241 and Si8244 identified as drivers for systems above 30 W in the manufacturer datasheet.
Key features include two isolated driver channels, precise dead-time adjustment, isolation between input and output, and isolation between output channels. These characteristics support reduced total harmonic distortion and a balance between low distortion and high system efficiency. The SI8244BB-D-IS1 is listed by DigiKey as a two-channel, 16-SOIC audio line driver and by Mouser as a 2.5 kV audio gate driver.
The Si824x architecture is intended to simplify gate-drive and isolation implementation in audio converters. The precision dead-time generator controls overlap between complementary switching paths, which is important for preventing shoot-through and improving amplifier behavior. The -D-IS1 ordering code identifies the Silicon Labs variant supplied in the specified package and qualification arrangement; detailed ordering, electrical, and environmental limits should be confirmed against the current manufacturer datasheet.
Typical applications include isolated Class-D audio power stages, high-power speaker amplifiers, isolated audio input systems, and audio conversion equipment requiring two complementary gate-drive channels. The isolation architecture can help reduce ground-loop and signal-integrity problems when the amplifier side must be separated from the control side.
Designers should verify supply rails, gate-drive voltage, dead-time behavior, isolation ratings, bypass-capacitor placement, and output-device requirements in the exact datasheet revision. Because the verified search results provide limited detailed electrical tables, values not explicitly present in the supplied data are marked as unavailable rather than inferred.
Drop-in alternatives for SI8244BB-D-IS1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SI8244BB-D-IS1 (same form factor and footprint) — differing in Product Type, Mounting Type, Package, Output-to-Output Isolation.
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Request AlternativesSI8244BB-D-IS1 Maximum Ratings & Electrical Characteristics
| Product Type | Isolated Class-D audio gate driver |
| Number of Channels | 2 channels |
| Isolation Voltage | 2.5 kV |
| Package | 16-SOIC |
| Mounting Type | Surface mount |
| Operating Temperature | -40 °C to +125 °C |
| Driver Architecture | Isolated high-side/low-side audio driver |
| Dead-Time Control | Precision dead-time generator |
| Input-to-Output Isolation | Yes |
| Output-to-Output Isolation | Yes |
| Signal Translation | Isolated level translation |
| Target Application | High-power Class-D audio amplification above 30 W |
| Moisture Sensitivity Level | MSL 2A |
| Peak Reflow Temperature | 260 °C |
| Maximum Time at Peak Reflow | 40 s |
| Terminal Finish | Nickel palladium gold |
| JESD-609 Code | e4 |
SI8244BB-D-IS1 16-soic Pin Configuration Guide
Pin configuration for SI8244BB-D-IS1 (16-soic package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for SI8244BB-D-IS1.
Refer to the datasheet for full pin configuration.
Typical Applications
SI8244BB-D-IS1 is suitable for 6 applications: High-Power Class-D Speaker Amplifier, Isolated Audio Input Interface, Isolated Audio Power-Stage Control, Professional Audio Amplifier, Industrial Audio Control System, Audio Conversion and Isolation Module.
High-Power Class-D Speaker Amplifier
The SI8244BB-D-IS1 is suited to the gate-drive stage of a high-power Class-D speaker amplifier because its two-channel isolated-driver architecture supports complementary high-side and low-side switching. The manufacturer identifies the Si8241/Si8244 family for Class-D audio systems above 30 W, while the precision dead-time generator helps control the interval between switching transitions. The 16-SOIC package keeps the control device compact, but the external MOSFETs must satisfy the required voltage, current, gate charge, and thermal limits. Verify supply rails and dead-time behavior against the exact datasheet before releasing the power stage.
Recommended
Isolated Audio Input Interface
The SI8244BB-D-IS1 can provide isolated signal transfer between a control domain and an audio power domain. Its input-to-output isolation helps prevent ground-potential differences and ground-loop currents from being directly coupled into the controlled amplifier stage. The two-channel structure can support complementary signal paths when the surrounding circuitry and load timing are compatible. The isolation barrier does not remove the need for careful creepage, clearance, surge, and safety validation, so the layout should follow the manufacturer’s isolation guidance and the final product’s applicable safety requirements.
Recommended
Isolated Audio Power-Stage Control
The SI8244BB-D-IS1 is applicable where an audio controller must remain electrically separated from a high-energy MOSFET switching stage. Its output-to-output isolation can reduce unintended coupling between complementary driver domains, while the precision dead-time feature supports repeatable switching behavior. The design should place the isolated supply and return network in the correct isolation domain, minimize parasitic capacitance across the barrier, and validate gate-driver voltage against the selected MOSFETs. This approach is useful in industrial and professional audio systems where a robust isolation boundary simplifies system partitioning.
Recommended
Professional Audio Amplifier
The isolated two-channel driver architecture of the SI8244BB-D-IS1 can fit professional audio amplifier designs where the control circuitry must be separated from the power-conversion section. The manufacturer highlights precise dead-time adjustment as a way to balance low total harmonic distortion against system efficiency, while the 2.5 kV classification provides a clear isolation-oriented feature for design planning. Actual distortion, output drive strength, and power performance must be measured with the chosen MOSFETs, transformer or speaker load, supply voltage, and PCB layout because those parameters are not supplied in the verified search excerpts.
Recommended
Industrial Audio Control System
The SI8244BB-D-IS1 can be used in an industrial audio or intercom system where a low-level control board must command a higher-power audio stage across an isolation boundary. Its operating-temperature range of -40 °C to +125 °C is useful for equipment exposed to wide environmental conditions, but it does not eliminate the need to check the external power devices and system thermal budget. Keep switching-node copper compact, avoid routing sensitive control signals beneath the isolation barrier, and provide local decoupling on both sides. Confirm that the isolation arrangement meets the enclosure, wiring, and surge requirements of the finished equipment.
Recommended
Audio Conversion and Isolation Module
The SI8244BB-D-IS1 is relevant to audio conversion modules that need isolated drive signals between a digital or analog control section and a power-amplifier section. Its level-translation behavior, two-channel isolation, and precision dead-time generator can simplify the interface compared with discrete isolation and gate-drive circuitry. The implementation still requires a careful split between control-side and power-side ground domains, as well as adequate insulation and safety margins. Use the manufacturer datasheet to verify propagation timing, output polarity, supply sequencing, and any dead-time programming or fixed timing constraints before finalizing the module interface.
Recommended
Recommended Products Summary
Engineering reference data for SI8244BB-D-IS1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI8244BB-D-IS1R | SI8244BB-IS1 | SI8241BB-D-IS1 | SI8244BB-C-IS1 |
|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
Key Differentiators
- Integrated two-channel isolation architecture (vs SI8244BB-D-IS1R)
- Precision dead-time control for Class-D power stages (vs SI8244BB-C-IS1)
- Wide stated operating-temperature range (vs SI8244BB-IS1)
Design Notes
Estimated: the SI8244BB-D-IS1 is a gate driver rather than the power-output device. Verify that the external MOSFET gate charge, gate-source voltage, drain current, and power dissipation are compatible with the driver’s actual output current and voltage limits, because those electrical values are not included in the supplied search excerpts. Provide separate, adequately decoupled supply rails for the isolated output domains and follow the manufacturer’s recommended capacitor types and placement.
Keep the high-current switching loop physically compact and keep sensitive audio or control traces away from drain-switching nodes. Treat the isolation barrier as a deliberate keepout region for copper and placement unless the manufacturer datasheet explicitly permits a crossing. Connect input and output grounds only where the system isolation strategy requires it, and verify creepage, clearance, and parasitic-capacitance requirements against the final safety and EMC constraints.
Do not substitute SI8244BB-D-IS1R, SI8244BB-IS1, or another Si824x family member solely because the package name is similar. Confirm the complete pin map, channel polarity, supply range, isolation rating, propagation delay, dead-time behavior, and temperature grade. A true drop-in replacement requires compatibility in all of those areas, not only a 16-SOIC outline.
Compliance Information
The supplied data provides JESD-609 code e4, MSL 2A, a 260 °C peak reflow temperature, and a 40-second maximum time at peak reflow, but it does not state RoHS, REACH, halogen-free, lead-free, or conflict-minerals status. The part is not stated to be AEC-Q100 qualified.
