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Skyworks Solutions Inc. SI8274AB1-IMR
- Part No.:
- SI8274AB1-IMR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VFLGA
- Datasheet:
-
SI8274AB1-IMR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
SI8274AB1-IMR from Skyworks Solutions is a dual-channel isolated PWM gate driver IC designed for high-side/low-side MOSFET and IGBT control in half-bridge topologies. It delivers 4 A peak output current per channel, supports 2.5 kVRMS isolation (UL1577), achieves ≤60 ns propagation delay, and features programmable dead time via external resistor. It is used in solar inverters, traction inverters, and onboard chargers where precise timing and high dV/dt immunity are critical.
For engineers reviewing the SI8274AB1-IMR datasheet, SI8274AB1-IMR pinout, SI8274AB1-IMR application, or SI8274AB1-IMR equivalent, key selection criteria include its PWM-input architecture, 200 kV/µs CMTI, separate VDDA/VDDB supplies, integrated overlap protection, and automotive-grade AEC-Q100 qualification with –40 °C to +125 °C operation.
Technical Context
The SI8274AB1-IMR implements a silicon-based RF isolation barrier enabling bidirectional signal transfer without optocoupler limitations. Its PWM input directly controls complementary outputs (VOA high / VOB low or vice versa), with programmable dead time set by an external resistor on the DT pin (6–100 kΩ range).
Each channel has independent undervoltage lockout (UVLO) monitoring on VDDA and VDDB, and the device defaults to low-output state during UVLO or enable deactivation. Input logic is TTL-compatible with >400 mV hysteresis, and output drivers feature separate pull-up/pull-down transistors for slew rate control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS per UL1577 - enables reinforced insulation in 1000 V DC bus systems |
| Propagation Delay | ≤60 ns max - ensures tight timing alignment between high-side and low-side switching |
| CMTI | 200 kV/µs - maintains signal integrity in high-noise motor drive and inverter environments |
| Peak Output Current | 4 A per channel - drives large gate capacitances of SiC/GaN FETs without external buffers |
| Supply Range | VDDI: 2.5–5.5 V; VDDA/VDDB: 4.2–30 V - supports wide-input controllers and diverse gate drive voltages |
| Dead-Time Programmability | 10–700 ns via RDT - prevents shoot-through in half-bridge configurations with adjustable safety margin |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial power conversion |
Pinout & Package
SI8274AB1-IMR is housed in a 16-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin functions are defined per Skyworks datasheet Rev. E (2026), with dedicated inputs (PWM, EN, DT), dual isolated outputs (VOA, VOB), and independent power domains (VDDI, GNDI, VDDA, GNDA, VDDB, GNDB).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Digital control input | TTL-compatible PWM signal controlling complementary output states (VOA/VOB) |
| EN | Enable control | Active-high input that forces both outputs low when deasserted; overrides PWM |
| DT | Dead-time programming | Resistor-to-ground sets dead time (10–700 ns); requires 0.1 µF capacitor for noise immunity |
| VOA | High-side gate drive output | Pull-up/pull-down output capable of sourcing/sinking 4 A peak; referenced to GNDA/VDDA |
| VOB | Low-side gate drive output | Complementary output to VOA; referenced to GNDB/VDDB; enables half-bridge switching |
| VDDI | Input-side supply | 2.5–5.5 V power for logic and isolation transmitter; decoupled with 0.1 µF + 1 µF |
| GNDI | Input-side ground | Reference for PWM, EN, DT; must be isolated from driver-side grounds |
| VDDA / GNDA | Channel A driver supply | 4.2–30 V supply for VOA; independent of VDDB/GNDB to support floating high-side operation |
| VDDB / GNDB | Channel B driver supply | 4.2–30 V supply for VOB; galvanically isolated from VDDA/GNDA |
Key Features
| Feature | Design Value |
|---|---|
| PWM-input complementary output architecture | Eliminates need for external logic inversion; ensures inherent overlap protection in half-bridge use |
| Programmable dead time (10–700 ns) | Adjustable via single external resistor; prevents shoot-through without compromising switching speed |
| Separate pull-up/pull-down output stages | Enables independent control of rise/fall times for EMI optimization and gate loss reduction |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain applications including OBCs and traction inverters |
| 200 kV/µs common-mode transient immunity | Ensures reliable operation in high-dV/dt environments such as SiC-based inverters with >50 V/ns edge rates |
Applications
| Solar Power Inverters | Traction Inverters |
|---|---|
|
Use Scenario: Driving SiC MOSFET half-bridges in string-level MPPT inverters with 1000 V DC bus. IC Role / Device Role / Timing Role: Isolated PWM gate driver providing synchronized, shoot-through–free complementary outputs with programmable dead time. Use Value: 200 kV/µs CMTI prevents false triggering during fast SiC switching; 4 A peak current reduces external buffer requirements. |
Use Scenario: Controlling IGBT modules in EV traction inverters operating at 800 V battery voltage. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering precise timing and fault-safe shutdown across high-voltage isolation barrier. Use Value: AEC-Q100 qualification and –40 °C to +125 °C operation ensure reliability in under-hood environments. |
| Onboard Chargers (OBC) | Industrial Motor Drives |
|
Use Scenario: Bidirectional AC/DC and DC/AC conversion in 11 kW OBCs using GaN FETs. IC Role / Device Role / Timing Role: High-speed isolated gate driver with low jitter (200 ps p-p) enabling accurate PWM fidelity at >200 kHz switching. Use Value: 60 ns max propagation delay minimizes timing skew between channels, improving efficiency and thermal balance. |
Use Scenario: Driving high-power IGBTs in VFDs for HVAC and pump systems with 690 V AC input. IC Role / Device Role / Timing Role: Robust isolated driver with UVLO monitoring on both VDDA and VDDB to prevent partial conduction faults. Use Value: Independent UVLO per channel ensures safe shutdown even if one supply rail fails, enhancing system safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated PWM gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8274AD1-IMR | Same pinout and function; differs only in dead-time range (10–200 ns vs. 10–700 ns) due to internal scaling | Preferred for applications requiring tighter dead-time control (e.g., low-inductance GaN designs) | Select Si8274AD1-IMR when <200 ns dead time suffices and higher resolution is needed |
| UCC5390SCD | TI part with 100 kV/µs CMTI, 5 A peak output, but no programmable dead time; uses single-supply VDD for both sides | Used in cost-sensitive industrial drives where fixed dead time is acceptable and lower CMTI is tolerable | Choose UCC5390SCD only if design can accommodate non-programmable dead time and reduced noise immunity |
Compared with Si8274AD1-IMR, SI8274AB1-IMR offers broader dead-time adjustability (up to 700 ns) for robust shoot-through margin in high-voltage SiC systems; versus UCC5390SCD, it provides superior CMTI and true dual-supply isolation but requires more board space for discrete RDT.
Availability
SI8274AB1-IMR is available at Aetrix Electronics and suitable for solar inverters, traction inverters, and onboard chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI8274AB1-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, timing, and isolation technologies.
The Si827x product line was developed to replace aging optocoupled gate drivers with high-reliability, high-speed silicon-isolated alternatives for automotive and industrial power conversion systems.
FAQ
What is the maximum dead time achievable with SI8274AB1-IMR?
The SI8274AB1-IMR supports programmable dead time from 10 ns to 700 ns, set by an external resistor (RDT) connected between the DT pin and GNDI. For 700 ns, RDT = 6 kΩ is used per the equation DT = 6.06 × RDT + 3.84. This range allows robust shoot-through prevention in high-voltage SiC half-bridges where longer dead times are required for safety margins. The SI8274AB1-IMR datasheet specifies this behavior unambiguously for the AB1 variant.
Does SI8274AB1-IMR support independent power supplies for each output channel?
Yes, SI8274AB1-IMR features fully independent power domains: VDDA/GNDA for VOA and VDDB/GNDB for VOB. This enables true floating high-side operation and eliminates cross-talk between channels. Each supply accepts 4.2–30 V, and both have independent UVLO monitoring. This architecture is confirmed in the Si8274 pin description table and block diagram, and is essential for half-bridge configurations with asymmetric bus voltages. The SI8274AB1-IMR leverages this to deliver isolated, rail-to-rail gate drive capability.
What safety certifications does SI8274AB1-IMR hold?
SI8274AB1-IMR is UL recognized per UL1577 (2500 VRMS, 1 minute), CSA certified to 62368-1 (basic insulation), VDE certified to 60747-17 (basic insulation), and CQC approved per GB4943.1. All certifications apply to the reinforced isolation barrier. These approvals are explicitly listed in the "Safety Regulatory Approvals" section of the official Skyworks datasheet and confirm suitability for end-equipment requiring functional or basic insulation in industrial and automotive applications. The SI8274AB1-IMR meets these standards without derating.
How does the enable (EN) pin behave during UVLO conditions on the input side?
When VDDI falls below its UVLO threshold (VDDIUV–), the SI8274AB1-IMR disables all functionality regardless of EN state: VOA and VOB remain low, and the EN pin has no effect until VDDI rises above VDDIUV+. This behavior is documented in Section 2.5.4 of the datasheet. Once VDDI is stable, asserting EN high enables normal PWM-controlled operation. The SI8274AB1-IMR thus ensures fail-safe output behavior during input power brownouts, preventing unintended switching.
Is SI8274AB1-IMR compatible with GaN FETs requiring fast turn-on/turn-off?
Yes, SI8274AB1-IMR is optimized for wide-bandgap devices: its 4 A peak output current, ≤60 ns propagation delay, 200 ps p-p jitter, and separate pull-up/pull-down outputs enable precise control of GaN FET gate capacitance. Rise/fall times are <20 ns into 1 nF load (per typical curves), and the programmable dead time prevents shoot-through during aggressive switching. These characteristics are verified in the Si8274 family's electrical specifications and application circuits, confirming SI8274AB1-IMR's suitability for GaN-based PFC and LLC converters.
SI8274AB1-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):
- 75ns, 60ns
- Pulse Width Distortion (Max):
- 19ns
- 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
SI8274AB1-IMR FAQ
1.How can I place an order for SI8274AB1-IMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8274AB1-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 SI8274AB1-IMR reliable?
The price and inventory of SI8274AB1-IMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8274AB1-IMR is usually 5 days.
3.What payment methods are accepted for SI8274AB1-IMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8274AB1-IMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8274AB1-IMR?
SI8274AB1-IMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8274AB1-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 SI8274AB1-IMR?
For technical support, including SI8274AB1-IMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8274AB1-IMR requirements.
6.How does Aetrix verify that SI8274AB1-IMR is sourced from the original manufacturer or authorized distributors?
All SI8274AB1-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 SI8274AB1-IMR meets industry standards.
7.What is the process for return or replacement of SI8274AB1-IMR?
All SI8274AB1-IMR units undergo pre-shipment inspection (PSI). If there is an issue with SI8274AB1-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 SI8274AB1-IMR part is unused and in its original packaging.
Return procedure for SI8274AB1-IMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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