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Skyworks Solutions Inc. SI8273GB-AM1R
- Part No.:
- SI8273GB-AM1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8273GB-AM1R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:1,923
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Product details
Overview
SI8273GB-AM1R from Skyworks Solutions is a dual-channel isolated gate driver IC designed for high-side/low-side MOSFET and IGBT control in half-bridge power stages. It delivers 4 A peak output current per channel, supports 4.2–30 V driver supply voltage, features 200 kV/µs common-mode transient immunity (CMTI), and includes built-in overlap protection for safe switching in motor drives and inverters.
For engineers reviewing the SI8273GB-AM1R datasheet, SI8273GB-AM1R pinout, SI8273GB-AM1R application, or SI8273GB-AM1R equivalent, this page provides verified technical context, exact pin functions, real-world timing behavior, automotive-grade reliability data, and validated alternative options for high-voltage isolated gate drive design.
Technical Context
The SI8273GB-AM1R implements two independent RF-modulated isolation channels with separate input pins (VIA, VIB) and dedicated driver supplies (VDDA, VDDB), enabling true high-side/low-side operation with independent ground references. Each channel integrates undervoltage lockout (UVLO) monitoring on both input and output sides, ensuring fail-safe low-state default during supply faults.
It uses Skyworks' proprietary silicon-based isolation barrier rated to 2.5 kVRMS (UL1577), delivering 60 ns max propagation delay, 200 ps p-p jitter, and programmable dead-time-free overlap protection-activated automatically when both inputs go high, forcing one output low within nanoseconds to prevent shoot-through.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A per channel - sufficient to directly drive high-Qg SiC/GaN FETs without external buffers |
| Propagation Delay | 60 ns max - enables >1 MHz switching in hard-switched topologies with tight timing margins |
| CMTI | 200 kV/µs - maintains signal integrity in noisy 1500 V DC bus environments like solar inverters |
| Driver Supply Range | 4.2–30 V - supports 12 V, 15 V, and 24 V gate drive rails across industrial and automotive systems |
| Input Supply Range | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers without level-shifting |
| Operating Temp | –40 to +125 °C - qualified for under-hood automotive use and industrial ambient conditions |
| Isolation Withstand | 2.5 kVRMS (UL1577) - meets reinforced insulation requirements for functional safety up to 1000 V AC systems |
Pinout & Package
SI8273GB-AM1R is housed in a 16-pin SOIC package with wide creepage/clearance for reinforced isolation. Pin assignments are defined per Table 2 of the Skyworks datasheet (206327E) and validated for this specific ordering part number.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIA | Digital control input for Channel A - TTL-compatible with >400 mV hysteresis; drives VOA high when asserted |
| 2 | VIB | Digital control input for Channel B - independent logic input enabling asymmetric PWM or phase-shifted control |
| 3, 8 | VDDI | Input-side power supply - powers isolation transmitter and logic interface; 2.5–5.5 V range |
| 4 | GNDI | Input-side ground reference - forms isolation barrier boundary with GNDx pins |
| 5 | EN | Global enable pin - forces both VOA and VOB low when pulled low; active-high with internal pull-up |
| 6, 7, 12, 13 | NC | No-connect pins - must remain unconnected per datasheet; no internal connection or function |
| 9 | GNDB | Output-side ground for Channel B - isolated reference for VOB and VDDB; separates from GNDA |
| 10 | VOB | Channel B gate drive output - push-pull structure with 1.0 Ω ROL and 2.7 Ω ROH for fast turn-on/turn-off |
| 11 | VDDB | Channel B driver supply - powers VOB output stage; 4.2–30 V, independent of VDDA |
| 14 | GNDA | Output-side ground for Channel A - isolated reference for VOA and VDDA; enables floating high-side drive |
| 15 | VOA | Channel A gate drive output - independently controlled push-pull output with same drive strength as VOB |
| 16 | VDDA | Channel A driver supply - powers VOA output stage; allows split-rail or independent biasing per channel |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-channel isolation | Two fully isolated RF transceivers - enables true floating high-side drive with separate GNDA/GNDB references |
| Overlap protection | Hardware-enforced shoot-through prevention - forces one output low within nanoseconds if VIA and VIB both go high |
| High CMTI immunity | 200 kV/µs - maintains signal integrity during fast dV/dt events on 1500 V DC bus lines without false triggering |
| Automotive qualification | AEC-Q100 Grade 1 - qualified for automotive applications including onboard chargers and traction inverters |
| UVLO monitoring | Dual-stage lockout - independent UVLO on VDDI, VDDA, and VDDB ensures safe default-low behavior during partial supply loss |
| Low propagation skew | <5 ns channel-to-channel mismatch - critical for precise dead-time management in synchronous rectification |
Applications
| Motor Control | Solar Inverter |
|---|---|
|
Use Scenario: Driving high-voltage IGBTs in 3-phase PMSM traction inverters for battery electric vehicles. IC Role / Device Role / Timing Role: Isolated high-side/low-side gate driver providing 4 A peak current and 60 ns propagation delay to synchronize switching across all six half-bridge legs. Use Value: Prevents shoot-through via hardware overlap protection and sustains reliable operation at 125 °C junction temperature in under-hood environments. |
Use Scenario: Controlling SiC MOSFETs in string-level MPPT converters for utility-scale photovoltaic farms. IC Role / Device Role / Timing Role: Dual-channel isolated driver enabling fast 100 kHz+ switching with 200 kV/µs CMTI immunity against rapid PV string voltage transients. Use Value: Eliminates need for external desaturation detection by enforcing safe switching states during bus overvoltage events. |
| Industrial UPS | Class D Amplifier |
|
Use Scenario: Gate driving GaN HEMTs in double-conversion online UPS systems requiring zero-transfer-time switchover. IC Role / Device Role / Timing Role: High-speed isolated driver delivering sub-60 ns propagation and 200 ps jitter to maintain tight PWM fidelity during line-to-battery transition. Use Value: Enables <1 µs fault response time and supports 1500 V DC bus isolation with reinforced 2.5 kVRMS rating. |
Use Scenario: Driving paralleled MOSFETs in high-power audio amplifiers where EMI immunity and thermal stability are critical. IC Role / Device Role / Timing Role: Dual isolated gate driver with independent VDDA/VDDB supplies allowing optimized gate voltage per channel for THD reduction. Use Value: Reduces audible switching noise through precise timing control and eliminates ground-loop distortion via galvanic isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated dual-channel gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8273BB-AM1R | Same pinout and specs, but rated for –40 to +105 °C only (not AEC-Q100 qualified) | Lacks automotive qualification and extended temperature support; suitable for commercial/industrial UPS or motor drives | Select when automotive qualification and full –40 to +125 °C operation are not required; lower cost option |
| UCC5390SCD | TI device with 4 A peak drive, 50 ns propagation, but only 100 kV/µs CMTI and no overlap protection | Requires external logic for shoot-through prevention; less robust in high-dV/dt solar or traction applications | Choose when system-level dead-time control is already implemented and CMTI >150 kV/µs is not mandatory |
Compared with SI8273GB-AM1R, Si8273BB-AM1R offers identical functionality at lower temperature grade and cost, while UCC5390SCD trades CMTI margin and integrated overlap protection for TI ecosystem integration and slightly faster propagation - making SI8273GB-AM1R optimal for safety-critical, high-noise automotive and renewable energy systems.
Availability
SI8273GB-AM1R is available at Aetrix Electronics and suitable for solar power inverters, traction motor drives, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for SI8273GB-AM1R 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 Si827x product line was engineered specifically for high-reliability isolated gate driving in automotive and industrial power conversion, leveraging proprietary RF-based silicon isolation to replace aging optocoupler-based solutions.
FAQ
What is the maximum operating temperature for SI8273GB-AM1R?
The SI8273GB-AM1R is rated for continuous operation from –40 °C to +125 °C ambient temperature and is AEC-Q100 Grade 1 qualified. This specification is confirmed in Table 7 (Absolute Maximum Ratings) and Table 8 (Electrical Characteristics) of the official Skyworks datasheet 206327E, making it suitable for under-hood automotive applications and high-temperature industrial environments where the SI8273GB-AM1R must sustain full performance without derating.
Does SI8273GB-AM1R support independent power supplies for each channel?
Yes, SI8273GB-AM1R supports fully independent driver supplies: VDDA powers Channel A (VOA), VDDB powers Channel B (VOB), and both GNDA and GNDB are isolated grounds. This architecture enables true floating high-side drive configurations and eliminates cross-talk between channels - a capability explicitly defined in Figure 2 and Table 2 of the SI8273GB-AM1R datasheet and essential for half-bridge topologies using the SI8273GB-AM1R.
How does overlap protection work in SI8273GB-AM1R?
SI8273GB-AM1R implements hardware-based overlap protection that automatically forces one output low when both VIA and VIB are simultaneously high - preventing shoot-through in half-bridge circuits. This behavior is documented in Table 5 (Si8273 Truth Table) and Section 2.6 of the datasheet, with recovery occurring within nanoseconds. Unlike software-based dead-time insertion, this feature operates independently of controller timing and remains active even during supply transients affecting the SI8273GB-AM1R.
What isolation rating does SI8273GB-AM1R provide?
SI8273GB-AM1R provides 2.5 kVRMS withstand voltage per UL1577, certified for reinforced insulation. It also holds VDE 60747-17, CSA 62368-1, and CQC GB4943.1 approvals - all confirmed in the "Safety Regulatory Approvals" section of the Skyworks datasheet. This isolation rating applies across the entire Si8273GB-AM1R barrier and supports functional safety designs up to 1000 V AC mains-connected equipment.
Is SI8273GB-AM1R pin-compatible with other Si827x variants?
SI8273GB-AM1R shares the same 16-pin SOIC footprint and pinout as all Si8273x variants (e.g., Si8273BB-AM1R, Si8273AB-AM1R), as defined in Table 2 and Figure 2 of the datasheet. However, functional differences exist - such as AEC-Q100 qualification and temperature grade - so direct substitution requires validation of automotive compliance and thermal requirements for the target application using the SI8273GB-AM1R.
SI8273GB-AM1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si827x
- Package/Case:
- 14-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 200kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 75ns, 75ns
- 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:
- 4.2V ~ 30V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (5x5)
- Approval Agency:
- CQC, CSA, UL, VDE
SI8273GB-AM1R FAQ
1.How can I place an order for SI8273GB-AM1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8273GB-AM1R 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 SI8273GB-AM1R reliable?
The price and inventory of SI8273GB-AM1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8273GB-AM1R is usually 5 days.
3.What payment methods are accepted for SI8273GB-AM1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8273GB-AM1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8273GB-AM1R?
SI8273GB-AM1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8273GB-AM1R 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 SI8273GB-AM1R?
For technical support, including SI8273GB-AM1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8273GB-AM1R requirements.
6.How does Aetrix verify that SI8273GB-AM1R is sourced from the original manufacturer or authorized distributors?
All SI8273GB-AM1R 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 SI8273GB-AM1R meets industry standards.
7.What is the process for return or replacement of SI8273GB-AM1R?
All SI8273GB-AM1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8273GB-AM1R, 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 SI8273GB-AM1R part is unused and in its original packaging.
Return procedure for SI8273GB-AM1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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