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Skyworks Solutions Inc. SI8238BC-D-IS1R
- Part No.:
- SI8238BC-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8238BC-D-IS1R.pdf
- Description:
- DGT ISO 3.75KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,886
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Product details
Overview
SI8238BC-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 3.75 kVRMS input-to-output isolation, and SOIC-16 narrow-body package. It implements two independent isolated drivers with TTL-compatible inputs (VIA/VIB), no internal dead time, and operates across –40°C to +125°C for high-reliability motor control and inverter applications.
For engineers reviewing the SI8238BC-D-IS1R datasheet, SI8238BC-D-IS1R pinout, SI8238BC-D-IS1R application, or SI8238BC-D-IS1R equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade compatibility (AEC-Q100), isolation safety certifications (UL 1577, VDE 60747-17), and real-world use context for MOSFET/IGBT half-bridge and dual-switch topologies.
Technical Context
The SI8238BC-D-IS1R belongs to the Si823x dual-driver family and uses Skyworks' proprietary RF-based silicon isolation barrier-replacing optocouplers with higher speed, lower propagation delay (typ. 25 ns), and superior CMTI (>50 kV/µs). Its two independent channels support fully asynchronous operation with separate VDDA/VDDB supplies and individual UVLO monitoring (8 V threshold).
Unlike HS/LS variants (e.g., SI8233), SI8238BC-D-IS1R lacks overlap protection and programmable dead time, enabling direct dual-switch control without inter-channel timing constraints. Input logic is TTL-compatible with >400 mV hysteresis, and outputs drive gates directly with 4.0 A source/sink capability at 12 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS per UL 1577 - enables reinforced insulation in industrial inverters up to 1000 VDC bus systems |
| Peak Output Current | 4.0 A per channel - drives high-Qg MOSFETs (e.g., 100 nC) at ≤100 kHz without external buffers |
| Propagation Delay | 25 ns max (L-H/H-L) - supports switching frequencies up to 8 MHz with tight timing control |
| UVLO Threshold | 8 V on VDDA/VDDB - prevents erratic gate drive during brown-out conditions in 12–24 V power rails |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
| Supply Voltage Range | 4.5–24 V on VDDI, VDDA, VDDB - compatible with 5 V logic control and 15 V gate drive rails |
| CMTI | >50 kV/µs - immune to fast transients in high-dV/dt motor drive and solar inverter PCB layouts |
Pinout & Package
SOIC-16 narrow-body RoHS-compliant package (5.3 mm × 10.3 mm, 1.27 mm pitch), creepage ≥5.5 mm, clearance ≥5.5 mm, rated for 3.75 kVRMS isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Power for isolation barrier and input logic; must be 4.5–24 V; powers internal RF oscillator |
| GNDI | Input-side ground | Reference for VIA/VIB inputs and VDDI; galvanically isolated from output grounds |
| VIA | Channel A input | TTL-compatible, high-true logic input controlling VOA; >400 mV hysteresis rejects noise |
| VIB | Channel B input | TTL-compatible, high-true logic input controlling VOB; independent of VIA timing |
| DISABLE | Global shutdown | Active-high signal forcing both VOA and VOB low; no effect if VDDI is below UVLO |
| VDDA | Output A supply | Drives VOA high-side or low-side; UVLO monitored independently; 4.5–24 V range |
| GNDA | Output A ground | Return path for VOA; may be tied to system ground or floating (e.g., bootstrap high-side) |
| VOA | Channel A output | 4.0 A capable gate driver output; sourced/sunk relative to GNDA; open-drain not supported |
| VDDB | Output B supply | Drives VOB; independent UVLO and supply rail; enables split-rail gate drive (e.g., +15 V / –5 V) |
| GNDB | Output B ground | Return path for VOB; electrically isolated from GNDA and GNDI |
| VOB | Channel B output | 4.0 A capable gate driver output; fully independent timing and supply from VOA |
| NC | No connect | Pins 1, 9, and 16 are unconnected; must remain unpopulated or left floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | Enables fully asynchronous control of two switches (e.g., dual-leg inverter phase, synchronous rectifier + main switch) |
| 4.0 A peak source/sink per channel | Directly drives high-capacitance GaN FETs or silicon MOSFETs up to 1000 V without external buffers |
| 3.75 kVRMS isolation rating | Meets reinforced insulation requirements for IEC 62368-1 and IEC 60601-1 (2 MOPP) in medical and industrial systems |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain applications including onboard chargers and traction inverters |
| RF-based isolation barrier | Delivers 45 ns max propagation delay and >50 kV/µs CMTI-superior to optocoupler-based alternatives |
| TTL-compatible inputs with hysteresis | Accepts 3.3 V or 5 V logic directly; 400 mV hysteresis prevents chatter during slow-rising control signals |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving high-side and low-side IGBTs in 3-phase BLDC motor controllers for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Dual-channel isolated gate driver providing independent, noise-immune control of upper/lower switches in each half-bridge leg. Use Value: 4.0 A drive strength ensures fast turn-on of 1200 V IGBTs; 3.75 kVRMS isolation meets IEC 61800-5-1 functional safety requirements for motor drives. |
Use Scenario: Controlling DC-link and AC-side MOSFETs in transformerless string inverters operating at 1000 VDC bus voltage. IC Role / Device Role / Timing Role: Isolated dual driver enabling independent gate control of high-voltage half-bridge legs with reinforced insulation between PV array and grid side. Use Value: SOIC-16 narrow-body footprint minimizes PCB area while maintaining 5.5 mm creepage; AEC-Q100 qualification supports long-life field deployment. |
| Onboard Chargers (OBC) | Battery Management Systems (BMS) |
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC and DC/DC stages of EV onboard chargers. IC Role / Device Role / Timing Role: Dual isolated driver delivering precise, jitter-free timing for interleaved totem-pole PFC and CLLC resonant converter primary switches. Use Value: 25 ns propagation delay matching enables <100 ps skew between channels; 125°C operation supports compact, convection-cooled OBC designs. |
Use Scenario: Driving high-side N-channel MOSFETs in active cell-balancing circuits for 800 V battery packs. IC Role / Device Role / Timing Role: Isolated dual driver providing safe, galvanically separated gate control for balancing FETs referenced to different cell potentials. Use Value: Independent VDDA/VDDB supplies allow each channel to operate at optimal gate voltage (e.g., +10 V / –5 V); 3.75 kVRMS withstand supports 100+ cell stacks. |
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 |
|---|---|---|---|
| SI8235BC-D-IS1R | Same dual-driver configuration, 4.0 A output, 3.75 kVRMS, but SOIC-16 wide-body package (7.5 mm width, 8.3 mm creepage) | Preferred where higher creepage is required for 1500 VDC systems or enhanced partial discharge immunity is needed | Select SI8235BC-D-IS1R when board layout allows wider package and creepage >8 mm is mandated by end-equipment safety standards |
| UCC5390SCDR | TI dual isolated driver with 4.5 A peak output, 5 kVRMS, but uses capacitive isolation and requires external VDD biasing for high-side channel | Used in high-density server PSUs where 5 kVRMS is mandatory and split-rail gate drive is not required | Choose UCC5390SCDR only if 5 kVRMS certification is non-negotiable and design can accommodate its asymmetric supply architecture |
Compared with SI8235BC-D-IS1R, SI8238BC-D-IS1R offers identical electrical performance in a space-constrained narrow-body package; versus UCC5390SCDR, it eliminates external bias complexity and delivers better CMTI for noisy motor drive environments.
Availability
SI8238BC-D-IS1R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, onboard chargers, and battery management systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for SI8238BC-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 power conversion systems-targeting automotive electrification, renewable energy, and industrial automation where robustness, speed, and safety certification are critical.
FAQ
What is the maximum switching frequency supported by the SI8238BC-D-IS1R?
The SI8238BC-D-IS1R supports up to 8 MHz switching frequency, enabled by its 25 ns typical propagation delay and 4.0 A output drive strength. This allows clean square-wave gate drive for high-frequency topologies like GaN-based LLC resonant converters and multi-phase interleaved PFC. The SI8238BC-D-IS1R maintains timing integrity across temperature and load variations, making it suitable for digitally controlled SMPS designs requiring sub-100 ns timing resolution.
Does the SI8238BC-D-IS1R include built-in dead time or overlap protection?
No, the SI8238BC-D-IS1R does not include built-in dead time or overlap protection-it is a dual-driver variant (Si8235/8 family), unlike HS/LS versions (e.g., SI8233). Its truth table confirms immediate, independent output transitions on VIA/VIB edges. Dead time must be implemented externally in the controller logic or PWM generator. This design gives full timing flexibility for applications like synchronous rectification or dual-active-bridge converters where zero dead time or custom asymmetry is required.
Can the SI8238BC-D-IS1R drive both high-side and low-side switches in a half-bridge configuration?
Yes-the SI8238BC-D-IS1R can drive both high-side and low-side switches in a half-bridge, but not simultaneously from a single device in standard configuration. Each channel (VOA/VOB) is fully isolated and independently powered (VDDA/VDDB), allowing VOA to drive a high-side switch (e.g., via bootstrap or isolated DC/DC) and VOB to drive the complementary low-side switch. However, because it lacks internal overlap protection, external logic must ensure shoot-through prevention. For integrated HS/LS control, SI8233BC-D-IS1R is recommended instead.
What safety certifications apply to the SI8238BC-D-IS1R?
The SI8238BC-D-IS1R carries UL 1577 recognition (3.75 kVRMS for 1 minute), VDE 60747-17 (basic insulation), and is AEC-Q100 Grade 1 qualified. It meets reinforced insulation requirements per IEC 62368-1 and provides 2 MOPP per IEC 60601-1. These certifications are validated for the SOIC-16 narrow-body package with specified creepage/clearance. No additional system-level derating is required when used within datasheet voltage, temperature, and layout guidelines.
Is the SI8238BC-D-IS1R pin-compatible with other Si823x variants?
The SI8238BC-D-IS1R shares identical pinout with all Si823x SOIC-16 narrow-body dual-driver variants (e.g., SI8235BC-D-IS1R, SI8237BC-D-IS1R), including VIA, VIB, VDDI, GNDI, DISABLE, VDDA, GNDA, VOA, VDDB, GNDB, VOB, and NC pins in the same positions. Electrical differences (e.g., 0.5 A vs. 4.0 A output, 2.5/3.75/5.0 kVRMS) do not affect mechanical or logical pin mapping. This enables drop-in replacement within the same isolation and drive-strength class, provided UVLO and thermal limits are re-verified.
SI8238BC-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:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- 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
SI8238BC-D-IS1R FAQ
1.How can I place an order for SI8238BC-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238BC-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 SI8238BC-D-IS1R reliable?
The price and inventory of SI8238BC-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 SI8238BC-D-IS1R is usually 5 days.
3.What payment methods are accepted for SI8238BC-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238BC-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238BC-D-IS1R?
SI8238BC-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238BC-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 SI8238BC-D-IS1R?
For technical support, including SI8238BC-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238BC-D-IS1R requirements.
6.How does Aetrix verify that SI8238BC-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8238BC-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 SI8238BC-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8238BC-D-IS1R?
All SI8238BC-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8238BC-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 SI8238BC-D-IS1R part is unused and in its original packaging.
Return procedure for SI8238BC-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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