SI8244BB-C-IS1 - 2-Channel Isolated Class-D Driver
MPN: SI8244BB-C-IS1 ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI8244BB-C-IS1 Overview
An isolated gate driver is an interface and power-management semiconductor that transfers switching-control signals across a galvanic-isolation barrier while driving external MOSFET gates. The SI8244BB family combines two isolated drivers in one package, enabling compact isolated audio power stages, reduced ground-loop risk, and separation between control and power domains. Its high-side and low-side organization suits full-bridge Class-D topologies.
The key verified feature set includes PWM input, a high-precision linear programmable dead-time generator, 1 µs dead-time capability, high latchup immunity greater than 100 V/ns, and up to 1500 Vrms output-to-output isolation. The verified operating-temperature range is -40 °C to 125 °C. The device is supplied in a 16-SOIC package, also identified as MS-012AC in distributor documentation.
The precision dead-time function helps the designer balance low total harmonic distortion against switching efficiency by controlling the non-overlap interval between MOSFET gate commands. Exact propagation-delay, output-current, supply-current, and channel-polarity values were not supplied in the verified source set, so these parameters are not inferred here. The -IS1R variant is documented as RoHS compliant, but separate C-IS1 environmental declarations were not provided.
Typical uses include isolated Class-D audio amplifiers, full-bridge speaker power stages, isolated digital-to-analog audio systems, and industrial audio equipment where control-side and power-side grounds must remain separated. The Si824x family datasheet specifically targets high-power audio applications above 30 W. The driver should be paired with appropriately rated external MOSFETs, gate resistors, isolation components, and a thermal plan based on the final power-stage dissipation.
For PCB implementation, preserve the isolation creepage and clearance required by the final working voltages and certification target. Keep high-current gate-drive loops compact, connect each driver output to its corresponding MOSFET gate through the recommended resistor network, and provide local bypassing at the device supply pins. Do not infer a direct replacement from package similarity alone; verify dead-time, propagation delay, UVLO, channel polarity, isolation rating, and output-drive current against the original design.
This page combines the verified manufacturer family datasheet, distributor package data, and cross-reference evidence for the SI8244BB-C-IS1. It separates documented facts from unresolved procurement and electrical details, providing a practical basis for Class-D gate-drive design, sourcing review, and footprint-compatible replacement investigation.
Drop-in alternatives for SI8244BB-C-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-C-IS1 (same form factor and footprint) — differing in Product Type, Mounting Type, Package, Output-to-Output Isolation.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SI8244BB-C-IS1R
✅ Drop-In📋 Reference alternative (not in catalog)
SI8244BB-D-IS1
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View Datasheet →SI8244BB-D-IS1R
✅ Drop-In✓ In Stock
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View Datasheet →SI8244BB-IS1
✅ Drop-In📋 Reference alternative (not in catalog)
SI8244BB-C-IS1
✅ Drop-In✓ In Stock
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View Datasheet →SI8244BB-C-IS1 Specifications
| Product Type | Two-channel isolated Class-D audio gate driver |
| Channel Count | 2 channels |
| Input Signal | PWM input |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Dead-Time Generator | High-precision linear programmable generator with 1 µs capability |
| Latchup Immunity | Greater than 100 V/ns |
| Output-to-Output Isolation | Up to 1500 Vrms |
| Operating Temperature Range | -40 °C to 125 °C |
| Package | 16-SOIC, 3.90 mm body width |
| Package Outline | MS-012AC |
| Mounting Type | Surface-mount |
| Supply Type | ±750 V isolated driver capability as described for the family |
| High-Power Audio Target | Greater than 30 W |
| RoHS | Not verified for SI8244BB-C-IS1; SI8244BB-C-IS1R documented as compliant |
| Pricing | Current unit pricing not provided in verified data; distributor quote required |
SI8244BB-C-IS1 ms-012ac Pin Configuration Guide
Pin configuration for SI8244BB-C-IS1 (ms-012ac package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SI8244BB-C-IS1.
Refer to the datasheet for full pin configuration.
Typical Applications
SI8244BB-C-IS1 is suitable for 6 applications: Isolated Full-Bridge Class-D Audio Amplifier, Isolated Speaker Power Module, Isolated DAC-to-Amplifier Audio Path, Industrial Audio Equipment, High-Fidelity Consumer Audio Amplifier, Low-Noise Isolated Audio Control.
Isolated Full-Bridge Class-D Audio Amplifier
The SI8244BB-C-IS1 fits an isolated full-bridge audio power stage because it provides two isolated driver channels for complementary high-side and low-side switching. The verified Si824x family is aimed at Class-D systems above 30 W, and its programmable dead-time generator helps control MOSFET non-overlap. Place the driver outputs through appropriately sized gate resistors to the selected external MOSFETs, and validate dead time, switching transitions, and shoot-through margin across the full supply range.
Recommended
Isolated Speaker Power Module
The SI8244BB-C-IS1 can control a remote or floating speaker power module where the audio-control ground must remain isolated from the power-stage ground. Its two-channel architecture supports the complementary gate-drive arrangement required by many Class-D bridges, while the verified 4.5 V to 5.5 V supply range suits a regulated control-side rail. The design must still verify propagation delay, output drive, UVLO behavior, and the external MOSFETs before production release.
Recommended
Isolated DAC-to-Amplifier Audio Path
The SI8244BB-C-IS1 is suitable when a PWM audio-control signal must cross an isolation boundary before driving a Class-D output stage. The verified family description emphasizes isolated high-side and low-side drivers and low-noise operation for audio applications. Use the driver with a compatible isolated power and signal-chain design, maintain the required isolation creepage and clearance, and check the dead-time setting against the amplifier’s MOSFET switching characteristics.
Recommended
Industrial Audio Equipment
The SI8244BB-C-IS1 can be used in industrial audio equipment that benefits from galvanic separation between a controller and a high-current speaker amplifier. The verified family specifies output-to-output isolation up to 1500 Vrms and latchup immunity greater than 100 V/ns, which are useful in systems exposed to noisy power or ground conditions. These ratings do not replace a complete safety review; insulation, pollution degree, creepage, clearance, and fault behavior must be evaluated for the final installation.
Recommended
High-Fidelity Consumer Audio Amplifier
The SI8244BB-C-IS1 supports high-fidelity Class-D amplification when precise dead-time control is important to the balance between total harmonic distortion and efficiency. The verified family provides PWM input and programmable dead-time capability, allowing the amplifier designer to tune complementary switching behavior. Use appropriate gate resistors, layout symmetry, local supply decoupling, and thermal monitoring so the driver contributes clean timing rather than adding distortion or excessive switching loss.
Recommended
Low-Noise Isolated Audio Control
The SI8244BB-C-IS1 is appropriate for audio-control circuits that require isolation without relying on a non-isolated gate-drive path. According to the verified family information, the Si824x family supports input-to-output isolation for low-noise operation up to 8 MHz in the cited distributor description. Keep the isolation barrier and gate-drive return paths carefully arranged, and verify the complete signal bandwidth and timing behavior against the manufacturer datasheet before using it in a precision audio design.
Recommended
Recommended Products Summary
Engineering reference data for SI8244BB-C-IS1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI8244BB-C-IS1R | SI8244BB-D-IS1 | SI8244BB-D-IS1R | SI8244BB-IS1 |
|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Pricing | Current price not provided | Current price not provided | Current price not provided | Current price not provided | Current price not provided |
| Product Class | Class-D audio driver | Class-D audio driver | Class-D audio line driver | Class-D audio driver | Class-D audio gate driver |
Key Differentiators
- Family-level isolated Class-D gate-drive positioning (vs SI8244BB-D-IS1)
- Matched 16-SOIC footprint for family migration (vs SI8244BB-C-IS1R)
- Programmable dead-time feature (vs SI8244BB-IS1)
Design Notes
Treat the isolation barrier as a layout constraint rather than only a schematic symbol. Keep copper, pads, and high-current switching paths from crossing the specified isolation region, maintain the manufacturer-required creepage and clearance, and place the isolated-side supply components near the corresponding driver pins. The verified family describes output-to-output isolation up to 1500 Vrms, but the final maximum working voltage and safety requirements must determine the actual PCB geometry.
Use a clean, locally decoupled supply for the SI8244BB-C-IS1 and keep the gate-drive return paths short. Place the input, bypass, and gate-drive components according to the Si824x family layout guidance so switching current does not share a long path with the control reference. Verify UVLO, quiescent current, output drive, and propagation delay in the manufacturer datasheet because those values were not included in the supplied source snippets.
Do not select a replacement from the SI8244BB family name or 16-SOIC package alone. Confirm channel polarity, input-to-output timing, dead-time range, UVLO, output current, isolation rating, and external MOSFET drive compatibility. The verified cross-reference results identify related variants, but they do not provide a complete pin-by-pin equivalence matrix, so a substitute requires manufacturer-datasheet review and bench validation.
Compliance Information
The verified SI8244BB-C-IS1R distributor result states RoHS compliant, but that declaration was not supplied for the exact SI8244BB-C-IS1 ordering code. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals data was provided for the target.
