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Skyworks Solutions Inc. SI8238AB-D-IS1R
- Part No.:
- SI8238AB-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8238AB-D-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
SI8238AB-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 2.5 kVRMS input-to-output isolation, and SOIC-16 narrow-body package. It features independent TTL-compatible inputs (VIA/VIB), no internal dead time, and operates across –40°C to +125°C for driving high-side/low-side MOSFETs or IGBTs in half-bridge inverters.
For engineers reviewing the SI8238AB-D-IS1R datasheet, SI8238AB-D-IS1R pinout, SI8238AB-D-IS1R application, or SI8238AB-D-IS1R equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade qualification (AEC-Q100), isolation safety certifications (UL, VDE, CSA), and real-world use context for power electronics design.
Technical Context
The SI8238AB-D-IS1R implements two fully isolated RF-modulated channels using Skyworks' proprietary silicon isolation barrier, enabling independent control of two gate drive paths without shared ground reference. Each channel supports up to 4.0 A peak sink/source current with 45 ns typical propagation delay and 8 MHz maximum switching frequency.
It uses TTL-level inputs with >400 mV hysteresis and includes independent undervoltage lockout (UVLO) on input (VDDI) and each output supply (VDDA/VDDB), with 5 V UVLO threshold. The device lacks programmable dead time or overlap protection-features reserved for high-side/low-side variants like SI8233/34-not applicable to this dual-driver configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL 1577 - enables safe operation between primary and secondary sides in 400 VAC systems |
| Peak Output Current | 4.0 A per channel - drives large gate capacitance MOSFETs/IGBTs directly without external buffers |
| Propagation Delay | 45 ns max - supports high-frequency switching up to 8 MHz with tight timing control |
| UVLO Threshold | 5 V on VDDI, VDDA, VDDB - ensures reliable startup/shutdown behavior in noisy industrial environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor control applications |
| Package | SOIC-16 narrow body - RoHS-compliant, JEDEC-standard 260°C reflow compatible footprint |
| AEC-Q100 Grade | Qualified - meets automotive reliability requirements for onboard chargers and traction inverters |
Pinout & Package
SI8238AB-D-IS1R is housed in a 16-pin SOIC narrow-body package (5.3 mm width) with creepage/clearance optimized for 2.5 kVRMS isolation. Pin assignments are validated per Skyworks Si823x datasheet Figure 3 and Table 5 (Si8232/5/7/8 Dual Driver Truth Table).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side power supply | Supplies 4.5–24 V to isolated input logic; powers RF transmitter and input comparators |
| GNDI | Input-side ground reference | Reference for VIA/VIB inputs and VDDI; must be isolated from output grounds |
| VIA | Channel A input | TTL-compatible, >400 mV hysteresis; controls VOA state directly (no dead time) |
| VIB | Channel B input | TTL-compatible, >400 mV hysteresis; controls VOB state directly (no dead time) |
| DISABLE | Global output disable | Active-high signal forces both VOA and VOB low regardless of input states |
| VDDA | Output A power supply | Supplies 4.5–24 V to driver A; independent UVLO monitoring at 5 V threshold |
| VOA | Channel A output | 4.0 A peak source/sink gate driver output; referenced to GNDA |
| GNDA | Output A ground | Return path for VOA; electrically isolated from GNDI and GNDB |
| VDDB | Output B power supply | Supplies 4.5–24 V to driver B; independent UVLO monitoring at 5 V threshold |
| VOB | Channel B output | 4.0 A peak source/sink gate driver output; referenced to GNDB |
| GNDB | Output B ground | Return path for VOB; electrically isolated from GNDI and GNDA |
| NC | No connect | Pins 1, 2, 15, 16 - internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated drivers | Two fully isolated 4.0 A gate drive channels sharing only package - eliminates cross-talk and enables split-ground topologies |
| Silicon-based RF isolation | Replaces optocouplers with 45 ns propagation delay, superior CMTI (>35 kV/µs), and no LED aging or temperature drift |
| AEC-Q100 qualified | Validated for automotive use including onboard chargers and battery management systems with full PPAP support |
| TTL-compatible inputs with hysteresis | Accepts 3.3 V or 5 V logic directly; >400 mV hysteresis prevents noise-induced false triggering in EMI-heavy environments |
| Independent UVLO per supply rail | VDDI, VDDA, and VDDB each monitored separately - ensures safe shutdown if any supply drops below 5 V |
| RoHS-compliant SOIC-16 narrow body | Standard footprint compatible with automated assembly; 5.3 mm width saves PCB space vs. wide-body alternatives |
Applications
| Motor Control Inverters | Solar Microinverters |
|---|---|
|
Use Scenario: Driving complementary MOSFET pairs in three-phase BLDC motor controllers for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized turn-on/turn-off of high-side and low-side switches in each phase leg. Use Value: 4.0 A peak current enables direct drive of 100 nC gate charge devices; 45 ns propagation matching minimizes shoot-through risk in 20 kHz PWM systems. |
Use Scenario: Gate driving in single-phase transformerless solar microinverters interfacing PV panels to grid. IC Role / Device Role / Timing Role: Isolated dual driver controlling half-bridge power stage with reinforced insulation meeting IEC 62109 safety requirements. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification support long-term field reliability in outdoor, high-humidity environments. |
| Onboard EV Chargers | Industrial UPS Systems |
|
Use Scenario: Controlling GaN HEMTs in bidirectional AC/DC and DC/DC stages of 11 kW OBC modules. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering precise, low-jitter gate signals to fast-switching power semiconductors. Use Value: 8 MHz max switching capability and <1 ns channel-to-channel skew support high-efficiency, high-density designs compliant with ISO 15118. |
Use Scenario: Gate driving IGBTs in double-conversion online UPS inverters for data centers and telecom infrastructure. IC Role / Device Role / Timing Role: Robust isolated driver ensuring fail-safe operation during line transients and brownouts. Use Value: Independent UVLO on all three supplies (VDDI/VDDA/VDDB) prevents partial operation and latch-up during voltage sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8235AB-D-IS1R | Same dual-driver architecture, 4.0 A output, 2.5 kVRMS, but with 8 V UVLO threshold instead of 5 V | Better suited for systems where input supply stability above 8 V is guaranteed; less tolerant of marginal VDDI conditions | Select SI8235AB-D-IS1R only if system VDDI remains ≥8.5 V during all operating modes |
| UCC5350MCDR | Texas Instruments dual isolated driver with 5 A peak output, 3.75 kVRMS, and integrated Miller clamp; requires external isolated bias | Offers higher isolation and active Miller clamping for enhanced short-circuit protection in IGBT applications | Choose UCC5350MCDR when enhanced fault robustness and >3 kVRMS isolation are required, accepting added BOM complexity |
Compared with SI8235AB-D-IS1R, SI8238AB-D-IS1R's lower 5 V UVLO improves startup margin in low-voltage auxiliary rails; versus UCC5350MCDR, it trades Miller clamping and higher isolation for simpler biasing and smaller footprint in cost-sensitive 2.5 kVRMS applications.
Availability
SI8238AB-D-IS1R is available at Aetrix Electronics and suitable for motor control inverters, solar microinverters, onboard EV chargers, and industrial UPS systems requiring stable component supply, automotive-grade reliability, and rapid fulfillment.
Supply support for SI8238AB-D-IS1R 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 Si823x family was designed specifically for high-reliability isolated gate driving in automotive and industrial power conversion, emphasizing robustness, low propagation skew, and regulatory compliance across harsh operating environments.
FAQ
What is the isolation rating and safety certification status of SI8238AB-D-IS1R?
SI8238AB-D-IS1R provides 2.5 kVRMS input-to-output isolation per UL 1577 and carries CSA 62368-1 (reinforced insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1 certifications. These approvals validate its use in safety-critical power systems including EV chargers and industrial inverters where reinforced insulation is mandated.
Does SI8238AB-D-IS1R support programmable dead time or overlap protection?
No. SI8238AB-D-IS1R is a dual-driver variant (like Si8235/37/38) and does not include programmable dead time or overlap protection circuitry - those features are exclusive to high-side/low-side configurations (Si8230/33/34). Its truth table shows immediate, independent output response to VIA/VIB inputs with no intentional delay.
What are the UVLO thresholds for SI8238AB-D-IS1R and how do they affect system behavior?
SI8238AB-D-IS1R has a 5 V UVLO threshold on VDDI, VDDA, and VDDB. When any supply falls below 5 V, the corresponding section enters UVLO: input logic halts, and outputs default low. This ensures fail-safe behavior during brownouts and guarantees clean startup once all rails exceed 5 V - critical for automotive and industrial systems with unstable auxiliary supplies.
Can SI8238AB-D-IS1R drive both N-channel and P-channel MOSFETs?
Yes. SI8238AB-D-IS1R outputs are standard push-pull drivers capable of sourcing and sinking 4.0 A peak current. For high-side P-channel MOSFETs, connect VOA/VOB to gate and GNDA/GNDB to source; for N-channel, use bootstrap or isolated DC/DC to provide floating high-side gate drive voltage - the driver itself does not generate gate bias.
Is SI8238AB-D-IS1R pin-compatible with other Si823x dual-driver variants?
Yes. All Si823x dual-driver variants (e.g., SI8232AB-D-IS1R, SI8235AB-D-IS1R, SI8237AB-D-IS1R, SI8238AB-D-IS1R) share identical pinout, package, and functional interface. Differences are limited to peak current (0.5 A vs. 4.0 A) and UVLO threshold (5 V vs. 8 V), allowing drop-in replacement where electrical specs align with system requirements.
SI8238AB-D-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 2A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 6.5V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI8238AB-D-IS1R FAQ
1.How can I place an order for SI8238AB-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238AB-D-IS1R 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 SI8238AB-D-IS1R reliable?
The price and inventory of SI8238AB-D-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8238AB-D-IS1R is usually 5 days.
3.What payment methods are accepted for SI8238AB-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238AB-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238AB-D-IS1R?
SI8238AB-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238AB-D-IS1R 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 SI8238AB-D-IS1R?
For technical support, including SI8238AB-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238AB-D-IS1R requirements.
6.How does Aetrix verify that SI8238AB-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8238AB-D-IS1R 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 SI8238AB-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8238AB-D-IS1R?
All SI8238AB-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8238AB-D-IS1R, 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 SI8238AB-D-IS1R part is unused and in its original packaging.
Return procedure for SI8238AB-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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