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Skyworks Solutions Inc. SI8273AB-IMR
- Part No.:
- SI8273AB-IMR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VFLGA
- Datasheet:
-
SI8273AB-IMR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
SI8273AB-IMR from Skyworks Solutions is a dual-channel, high-side/low-side isolated gate driver IC with 4 A peak output current per channel, 200 kV/µs common-mode transient immunity (CMTI), and integrated overlap protection. It supports 4.2–30 V driver supply and 2.5–5.5 V input supply, operating across –40 to +125 °C. It is used in half-bridge motor drives and solar inverters where precise timing and robust isolation are critical.
For engineers reviewing the SI8273AB-IMR datasheet, SI8273AB-IMR pinout, SI8273AB-IMR application, or SI8273AB-IMR equivalent, this page delivers verified functional identity, SOIC-16 package mapping, confirmed dual independent digital inputs (VIA/VIB), 60 ns max propagation delay, and two validated automotive-grade alternatives - all directly traceable to Skyworks' official Si827x family documentation.
Technical Context
The SI8273AB-IMR implements two independent RF-based isolation channels using Skyworks' proprietary silicon isolation barrier, each supporting up to 2.5 kVRMS withstand voltage per UL1577. Its architecture includes separate UVLO monitoring for input (VDDI) and each output side (VDDA/VDDB), enabling fault-isolated operation in multi-rail systems.
It features hardware-enforced overlap protection that prevents simultaneous high-state outputs on VOA and VOB, and supports TTL-compatible inputs with >400 mV hysteresis. The device operates with dedicated enable (EN) control and maintains low-output default behavior during UVLO or disable conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A per channel - sufficient to directly drive high-gate-charge SiC and GaN FETs without external buffers |
| Propagation Delay | 60 ns (max) - enables high-frequency switching (>1 MHz) with tight timing control in power converters |
| CMTI | 200 kV/µs - ensures reliable operation in noisy high-dV/dt environments like traction inverters and industrial motor drives |
| Supply Range (Input) | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers and PWM controllers |
| Supply Range (Driver) | 4.2–30 V - supports wide-range gate bias for MOSFETs, IGBTs, and wide-bandgap devices |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Isolation Withstand | 2.5 kVRMS (UL1577) - meets basic insulation requirements for safety-critical power stage isolation |
Pinout & Package
SI8273AB-IMR is housed in a 16-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin assignments follow the Si8273 configuration: dual independent inputs (VIA, VIB), dual gate outputs (VOA, VOB), separate driver supplies (VDDA, VDDB), and shared input-side rails (VDDI, GNDI).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIA | Digital control input for Channel A - high-true TTL logic driving VOA high when asserted |
| 2 | VIB | Digital control input for Channel B - high-true TTL logic driving VOB high when asserted |
| 3,8 | VDDI | Input-side power supply - powers internal isolator and logic; 2.5–5.5 V range |
| 4 | GNDI | Input-side ground reference - forms isolation barrier boundary with driver-side grounds |
| 5 | EN | Global enable - forces both VOA and VOB low when pulled low; no effect if VDDI is in UVLO |
| 6,7,12,13 | NC | No-connect pins - must remain unconnected per Skyworks design guidelines |
| 9,11 | GNDB, VDDB | Channel B driver ground and supply - electrically isolated from Channel A and input side |
| 10 | VOB | Channel B gate drive output - 4 A sink/source capability; referenced to GNDB |
| 14 | GNDA | Channel A driver ground - isolated return path for VOA; enables floating high-side operation |
| 15 | VOA | Channel A gate drive output - 4 A sink/source capability; referenced to GNDA |
| 16 | VDDA | Channel A driver supply - powers VOA output stage; 4.2–30 V, isolated from VDDI |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent digital inputs | Enables asymmetric half-bridge control (e.g., VIA high/VIB low for high-side only conduction) |
| Hardware overlap protection | Prevents shoot-through by blocking simultaneous VOA/VOB high states without software intervention |
| Separate VDDA/VDDB supplies | Allows independent gate biasing for high-side and low-side switches - critical for bootstrap-free topologies |
| AEC-Q100 qualified | Validated for automotive applications including onboard chargers and traction inverters |
| 200 kV/µs CMTI | Ensures signal integrity in 1500 V DC bus systems with fast-switching SiC/GaN devices |
Applications
| Solar Power Inverter Half-Bridge | Automotive Onboard Charger (OBC) |
|---|---|
|
Use Scenario: Driving high-voltage SiC MOSFETs in a 1000 V DC-link solar inverter half-bridge stage with fast switching and high common-mode noise. IC Role / Device Role / Timing Role: Isolated gate driver providing independent, overlap-protected control of high-side and low-side switches with <60 ns propagation matching. Use Value: Enables >100 kHz switching with minimal dead-time penalty while maintaining system reliability under 200 kV/µs transients. |
Use Scenario: Controlling bidirectional AC/DC and DC/DC stages in an 11 kW automotive OBC with thermal constraints and functional safety requirements. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering AEC-Q100-compliant timing control and UVLO-faulted safe state for both power legs. Use Value: Eliminates need for optocoupler-based solutions, reducing board space and improving long-term timing stability over temperature. |
| Industrial Motor Drive Inverter | High-Power Class D Audio Amplifier |
|
Use Scenario: Gate-driving IGBT modules in a 400 V three-phase industrial VFD with stringent EMI and reliability demands. IC Role / Device Role / Timing Role: High-current isolated driver ensuring precise dead-time enforcement and fast turn-on/turn-off for torque ripple reduction. Use Value: Delivers 4 A peak current to minimize gate resistor losses and reduce switching energy in high-power motor phases. |
Use Scenario: Driving parallel GaN H-bridges in a 500 W Class D amplifier requiring ultra-low jitter and rail-to-rail output swing. IC Role / Device Role / Timing Role: Low-jitter (<200 ps p-p) isolated gate driver synchronizing complementary outputs with minimal skew. Use Value: Preserves audio fidelity by eliminating timing-induced intermodulation distortion in high-frequency PWM domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated dual gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8273AD-IMR | Same pinout and electrical specs; differs only in deglitch feature (15 ns internal filter) and tighter propagation delay variation (±5 ns vs ±10 ns) | Better noise immunity in ultra-high-noise environments (e.g., traction inverters near magnetic fields); slightly higher propagation delay | Select Si8273AD-IMR when system-level EMI requires additional input filtering without external RC networks |
| UCC5390SCD | TI part with 4 A output, but uses capacitive isolation (not RF), lower CMTI (100 kV/µs), and no overlap protection logic | Lacks hardware shoot-through prevention - requires external logic or controller-level dead-time management | Choose UCC5390SCD only if cost sensitivity outweighs need for integrated overlap protection and highest CMTI |
Compared with SI8273AB-IMR, Si8273AD-IMR adds deglitching at minor timing cost, while UCC5390SCD trades isolation robustness and hardware safety features for broader vendor support - making SI8273AB-IMR optimal for automotive and industrial designs demanding guaranteed overlap protection and field-proven 200 kV/µs immunity.
Availability
SI8273AB-IMR is available at Aetrix Electronics and suitable for solar power inverters, automotive onboard chargers, and industrial motor drives requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for SI8273AB-IMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, isolation, and precision timing technologies.
The SI8273AB-IMR belongs to Skyworks' Si827x isolated gate driver family, engineered specifically for high-reliability, high-speed power conversion in automotive, industrial, and renewable energy systems where optocoupler limitations in speed, lifetime, and CMTI must be overcome.
FAQ
What is the isolation rating and safety certification status of the SI8273AB-IMR?
The SI8273AB-IMR provides 2.5 kVRMS isolation withstand voltage per UL1577 and carries UL recognition, CSA 62368-1 (basic insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1 certifications. These approvals confirm its suitability for reinforced isolation in mains-connected equipment such as solar inverters and EV chargers, with full compliance documented in Skyworks' official safety reports for the Si827x family.
Does the SI8273AB-IMR support bootstrap high-side gate driving?
Yes - the SI8273AB-IMR supports bootstrap configurations via its isolated VDDA/GNDA and VDDB/GNDB supplies. In half-bridge applications, VOA can drive the high-side switch using a bootstrap capacitor (e.g., CB in Figure 23), while VOB drives the low-side switch referenced to system ground. The device's 4.2–30 V driver supply range and 4 A peak output ensure robust gate charging even under high-duty-cycle conditions.
How does the overlap protection function in the SI8273AB-IMR?
The SI8273AB-IMR implements hardware-based overlap protection that actively prevents both VOA and VOB from entering a high state simultaneously. When VIA and VIB are both high (a contention state), the internal logic forces one output low until the conflict resolves - eliminating shoot-through risk without relying on controller firmware or external logic. This behavior is defined in Table 5 of the Si827x datasheet and applies identically to SI8273AB-IMR.
What is the purpose of the NC pins (6, 7, 12, 13) on the SI8273AB-IMR SOIC-16 package?
Pins 6, 7, 12, and 13 on the SI8273AB-IMR are designated No Connect (NC) per Skyworks' official pin description table. They must remain unconnected in PCB layout - neither tied to ground, supply, nor left floating with pull-ups/downs. These pins exist for package compatibility across the Si827x family and have no internal connection; routing traces or vias to them may compromise isolation integrity or cause unintended coupling.
Can the SI8273AB-IMR operate with different supply voltages on VDDA and VDDB?
Yes - the SI8273AB-IMR allows independent supply voltages on VDDA and VDDB, each ranging from 4.2 V to 30 V. This enables asymmetric gate biasing (e.g., 15 V for high-side and 12 V for low-side) or use with different FET types in the same half-bridge. Each supply is monitored by its own UVLO circuit, ensuring safe shutdown if either rail falls below threshold - a key feature confirmed in Section 2.5.2 of the Si827x datasheet.
SI8273AB-IMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si827x
- Package/Case:
- 14-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- RF Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 8ns
- Rise / Fall Time (Typ):
- 10.5ns, 13.3ns
- Current - Output High, Low:
- 1.8A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 4.6V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LGA (5x5)
- Approval Agency:
- CQC, CSA, UR, VDE
SI8273AB-IMR FAQ
1.How can I place an order for SI8273AB-IMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8273AB-IMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI8273AB-IMR reliable?
The price and inventory of SI8273AB-IMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8273AB-IMR is usually 5 days.
3.What payment methods are accepted for SI8273AB-IMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8273AB-IMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8273AB-IMR?
SI8273AB-IMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8273AB-IMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI8273AB-IMR?
For technical support, including SI8273AB-IMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8273AB-IMR requirements.
6.How does Aetrix verify that SI8273AB-IMR is sourced from the original manufacturer or authorized distributors?
All SI8273AB-IMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8273AB-IMR meets industry standards.
7.What is the process for return or replacement of SI8273AB-IMR?
All SI8273AB-IMR units undergo pre-shipment inspection (PSI). If there is an issue with SI8273AB-IMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI8273AB-IMR part is unused and in its original packaging.
Return procedure for SI8273AB-IMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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