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Skyworks Solutions Inc. SI8274AB4D-IM1
- Part No.:
- SI8274AB4D-IM1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8274AB4D-IM1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
SI8274AB4D-IM1 from Skyworks Solutions is a dual-channel isolated PWM gate driver IC designed for high-side/low-side MOSFET/IGBT/SiC/GaN FET control in half-bridge topologies. It delivers 4 A peak output current per channel, supports 4.2–30 V driver supply, features programmable dead time (10–700 ns), and provides 200 kV/µs common-mode transient immunity (CMTI). It is used in solar inverters, traction inverters, and onboard chargers where precise timing and robust isolation are critical.
For engineers reviewing the SI8274AB4D-IM1 datasheet, SI8274AB4D-IM1 pinout, SI8274AB4D-IM1 application, or SI8274AB4D-IM1 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Skyworks' official Si827x family documentation and ordering guide.
Technical Context
The SI8274AB4D-IM1 implements a single PWM input architecture with internal overlap protection and user-programmable dead time via an external resistor on the DT pin. Its RF-based silicon isolation barrier enables 2.5 kVRMS withstand voltage (UL1577) and eliminates optocoupler aging and temperature drift.
Each channel operates independently with dedicated driver supplies (VDDA/VDDB), separate grounds (GNDA/GNDB), and UVLO monitoring per side. The device enters a safe low-output state during input-side undervoltage (VDDI < 2.3 V typ.) or enable deactivation, ensuring fail-safe gate drive behavior in power conversion systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4 A per channel - drives high-gate-charge SiC/GaN FETs without external buffers |
| Propagation Delay | 60 ns max - enables >1 MHz switching with tight timing control in hard-switched converters |
| CMTI | 200 kV/µs - maintains signal integrity in noisy motor drive and inverter environments |
| Dead Time Range | 10–700 ns (programmable via RDT) - prevents shoot-through in half-bridge configurations |
| Supply Voltage Range | VDDI: 2.5–5.5 V; VDDA/VDDB: 4.2–30 V - supports wide-input logic interfaces and diverse gate drive voltages |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive under-hood applications |
| Isolation Withstand | 2.5 kVRMS (UL1577, 1 min) - meets reinforced insulation requirements for 1000 V DC bus systems |
Pinout & Package
SI8274AB4D-IM1 is housed in a 16-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin assignments follow the Si8274 family layout with dedicated PWM, EN, DT, and dual independent driver supply/ground terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Single digital input | Drives VOA high / VOB low when high; VOA low / VOB high when low - enables complementary half-bridge control |
| EN | Enable control | Active-high; forces both outputs low when deasserted - provides system-level fault shutdown |
| DT | Dead-time programming | Connects to GNDI via resistor (6–100 kΩ) to set 10–700 ns delay between VOA/VOB transitions |
| VDDA / VDDB | Driver-side supplies | Independent 4.2–30 V supplies per channel - allows asymmetric gate drive voltages and floating operation |
| VOA / VOB | Gate drive outputs | Separate pull-up/pull-down outputs - support direct connection to FET gates without external resistors |
| GNDI | Input-side ground | Reference for PWM, EN, DT - must be isolated from GNDA/GNDB to maintain barrier integrity |
| GNDA / GNDB | Driver-side grounds | Independent return paths per channel - essential for accurate high-side sensing and noise rejection |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dead time | 10–700 ns via single external resistor - eliminates need for external logic or timers in half-bridge designs |
| Separate pull-up/pull-down outputs | Independent VO+ and VO− structure per channel - enables precise slew rate control without external components |
| Dual independent driver supplies | VDDA and VDDB with individual UVLO - supports asymmetric gate drive (e.g., 15 V high-side, 5 V low-side) |
| 200 kV/µs CMTI | Guaranteed minimum - ensures reliable operation in fast-switching SiC inverters with dV/dt > 50 V/ns |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) - certified for automotive traction inverters and onboard chargers |
Applications
| Solar Power Inverter | Traction Inverter |
|---|---|
|
Use Scenario: Driving high-voltage SiC half-bridge in string inverters with 1000 V DC bus and >100 kHz switching. IC Role / Device Role / Timing Role: Isolated PWM gate driver providing complementary, dead-time-controlled outputs to upper/lower FETs with 60 ns propagation matching. Use Value: 200 kV/µs CMTI prevents false triggering during rapid bus transients; 4 A peak current directly drives 100 nC gate charge without buffer stages. |
Use Scenario: Controlling dual IGBT modules in EV traction inverters operating at 800 V DC and 15 kHz PWM. IC Role / Device Role / Timing Role: Automotive-grade isolated driver delivering fail-safe gate signals with UVLO monitoring on both input and output sides. Use Value: AEC-Q100 Grade 1 qualification and –40 to +125 °C operation ensure reliability in under-hood environments; programmable dead time prevents shoot-through at variable load conditions. |
| Onboard Charger (OBC) | Industrial UPS |
|
Use Scenario: Bidirectional AC/DC and DC/DC stage control in 11 kW OBCs using GaN FETs. IC Role / Device Role / Timing Role: Dual isolated driver managing synchronous rectification and active clamp circuits with precise timing alignment. Use Value: 2.5 kVRMS isolation withstand supports reinforced insulation for 1500 V AC mains; separate VDDA/VDDB supplies enable optimal gate voltage tuning per topology segment. |
Use Scenario: High-efficiency double-conversion UPS with three-phase IGBT bridges and 400 V AC output. IC Role / Device Role / Timing Role: Half-bridge gate driver with integrated overlap protection and fast propagation for tight PWM loop control. Use Value: 60 ns max propagation delay and 200 ps p-p jitter enable stable 50–60 kHz operation with minimal phase error; SOIC-16 package supports automated PCB assembly. |
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 |
|---|---|---|---|
| Si8274AD-IS | Same Si8274 family; 16-pin SOIC but non-automotive grade (–40 to +125 °C only); no IM1 suffix - lacks AEC-Q100 qualification and PPAP support | Targeted at industrial SMPS and UPS; not suitable for automotive safety-critical systems | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| UCC5390SCD | Texas Instruments part; 4 A peak, 60 ns delay, but uses capacitive isolation (not RF); CMTI = 150 kV/µs; no programmable dead time - requires external circuitry | Used in industrial motor drives and PV microinverters; lacks native dead-time control for half-bridge optimization | Choose if TI ecosystem integration or capacitive isolation preference outweighs need for integrated dead time |
Compared with SI8274AB4D-IM1, Si8274AD-IS omits automotive qualification and failsafe diagnostics, while UCC5390SCD requires external dead-time generation and offers lower CMTI - making SI8274AB4D-IM1 the only option combining AEC-Q100, programmable dead time, and 200 kV/µs immunity in a single SOIC-16 package.
Availability
SI8274AB4D-IM1 is available at Aetrix Electronics and suitable for solar power inverters, traction inverters, and onboard chargers requiring stable component supply across multi-year production cycles and automotive PPAP validation.
Supply support for SI8274AB4D-IM1 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 electric vehicle powertrains, renewable energy systems, and industrial motor controls - leveraging proprietary RF-based silicon isolation for superior noise immunity and longevity over optocouplers.
FAQ
What is the function of the DT pin on the SI8274AB4D-IM1?
The DT pin on the SI8274AB4D-IM1 accepts an external resistor to ground (6–100 kΩ) that sets programmable dead time between VOA and VOB transitions, ranging from 10 to 700 ns. This feature prevents shoot-through in half-bridge configurations without requiring external logic. The SI8274AB4D-IM1 uses this pin exclusively for dead-time control - no other function is assigned to it in the datasheet.
Does the SI8274AB4D-IM1 support independent gate drive voltages for high-side and low-side channels?
Yes, the SI8274AB4D-IM1 supports fully independent gate drive supplies: VDDA powers the high-side driver (VOA) and VDDB powers the low-side driver (VOB), each with its own UVLO threshold and ground (GNDA/GNDB). This allows asymmetric configurations - for example, 15 V for high-side turn-on and 5 V for low-side - which is critical for optimizing SiC/GaN FET performance. The SI8274AB4D-IM1 datasheet confirms this capability in Table 3 and Section 2.5.2.
What safety certifications does the SI8274AB4D-IM1 hold?
The SI8274AB4D-IM1 is UL 1577 recognized (2500 VRMS, 1 minute), VDE 60747-17 certified (basic insulation), CSA 62368-1 compliant, and CQC GB4943.1 approved. All certifications apply to its reinforced isolation barrier. As an AEC-Q100 Grade 1 qualified part, the SI8274AB4D-IM1 also meets automotive reliability standards - confirmed in Skyworks' official datasheet Section "Safety Regulatory Approvals" and "Ordering Guide".
How does the SI8274AB4D-IM1 handle undervoltage conditions on the input side?
When VDDI falls below the UVLO threshold (~2.3 V typ.), the SI8274AB4D-IM1 forces both VOA and VOB into a low-output state regardless of PWM or EN status - ensuring fail-safe gate drive. Outputs remain low until VDDI exceeds the rising threshold and tSTART (minimum startup time) elapses. This behavior is explicitly defined in the SI8274AB4D-IM1 truth table and Section 2.5.2 of the datasheet.
Is the SI8274AB4D-IM1 pin-compatible with other Si827x variants like the Si8273 or Si8275?
No, the SI8274AB4D-IM1 is not pin-compatible with Si8273 or Si8275. While all share the SOIC-16 package, pin functions differ significantly: SI8274 uses PWM and DT pins, whereas Si8273 uses VIA/VIB inputs and Si8275 uses dual independent inputs. Table 3 (Si8274) vs. Table 2 (Si8273/75) in the datasheet confirms distinct pin mappings - attempting substitution would result in incorrect logic behavior or damage.
SI8274AB4D-IM1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si827x
- Package/Case:
- 14-VDFN
- Packaging:
- Tray
- Product Status:
- Obsolete
- Technology:
- RF Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 200kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 105ns, 75ns
- Pulse Width Distortion (Max):
- 47ns
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (5x5)
- Approval Agency:
- CQC, CSA, UR, VDE
SI8274AB4D-IM1 FAQ
1.How can I place an order for SI8274AB4D-IM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8274AB4D-IM1 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 SI8274AB4D-IM1 reliable?
The price and inventory of SI8274AB4D-IM1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8274AB4D-IM1 is usually 5 days.
3.What payment methods are accepted for SI8274AB4D-IM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8274AB4D-IM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8274AB4D-IM1?
SI8274AB4D-IM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8274AB4D-IM1 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 SI8274AB4D-IM1?
For technical support, including SI8274AB4D-IM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8274AB4D-IM1 requirements.
6.How does Aetrix verify that SI8274AB4D-IM1 is sourced from the original manufacturer or authorized distributors?
All SI8274AB4D-IM1 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 SI8274AB4D-IM1 meets industry standards.
7.What is the process for return or replacement of SI8274AB4D-IM1?
All SI8274AB4D-IM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8274AB4D-IM1, 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 SI8274AB4D-IM1 part is unused and in its original packaging.
Return procedure for SI8274AB4D-IM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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