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Skyworks Solutions Inc. SI8238BD-AS3R
- Part No.:
- SI8238BD-AS3R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8238BD-AS3R.pdf
- Description:
- DGTL ISO 5KV 2CH GATE DVR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,623
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Product details
Overview
SI8238BD-AS3R from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 5.0 kVRMS input-to-output isolation, and SOIC-14 wide-body package with increased creepage. It features independent 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 SI8238BD-AS3R datasheet, SI8238BD-AS3R pinout, SI8238BD-AS3R application, or SI8238BD-AS3R equivalent, this page delivers verified specifications, automotive-grade qualification status (AEC-Q100), isolation safety certifications (UL 1577, VDE 60747-17), and real-world design context for isolated MOSFET/IGBT gate drive in traction inverters and onboard chargers.
Technical Context
The SI8238BD-AS3R implements RF-based silicon isolation with two fully independent, galvanically isolated output channels-each capable of sourcing/sinking up to 4.0 A peak current. Its dual-driver architecture supports simultaneous, uncorrelated switching without overlap protection or programmable dead time, distinguishing it from HS/LS variants like SI8233BD-AS3.
It uses separate input-side (VDDI/GNDI) and output-side (VDDA/GNDA, VDDB/GNDB) power domains, enabling operation with split or floating output grounds. Input logic is TTL-compatible with >400 mV hysteresis, and UVLO thresholds are fixed at 8 V (rising) and 7.5 V (falling) on all supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVRMS per UL 1577 - enables reinforced insulation in 1000 VDC bus systems with 2 MOPP compliance per IEC 60601-1 |
| Peak Output Current | 4.0 A per channel - drives high-gate-charge SiC MOSFETs or IGBTs directly without external buffers in 10–20 kHz switching applications |
| Propagation Delay | ≤45 ns max - ensures tight timing alignment between dual outputs for synchronous half-bridge or dual-phase topologies |
| Supply Voltage Range | VDDI: 4.5–24 V; VDDA/VDDB: 6.5–24 V - supports direct connection to 12 V or 15 V gate drive supplies without LDO regulation |
| UVLO Threshold | 8.0 V (rising), 7.5 V (falling) on all rails - prevents erratic switching during brown-out conditions in automotive 12 V systems |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood automotive use and industrial motor drives with extended thermal margin |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C) - manufactured using full automotive process flows with AIAG-compliant PPAP documentation support |
Pinout & Package
SOIC-14 wide-body package (7.5 mm body width, 10.3 mm length) with increased creepage distance per IEC 60664-1; RoHS-compliant, 260 °C peak reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIA) | Input A signal | TTL-compatible logic input controlling VOA; >400 mV hysteresis prevents noise-induced toggling |
| 2 (VIB) | Input B signal | TTL-compatible logic input controlling VOB; electrically isolated from VIA and all output pins |
| 3 (GNDI) | Input-side ground | Reference for VIA/VIB/Disable; must be separated from output grounds to maintain isolation barrier integrity |
| 4 (VDDI) | Input-side supply | 4.5–24 V supply for input logic and isolation transmitter; powers RF oscillator and modulator |
| 5 (DISABLE) | Global disable control | Active-high input forcing both VOA and VOB low; no effect if VDDI is below UVLO threshold |
| 6 (NC) | No connect | Internally unused; must remain floating or grounded per layout guidelines to avoid coupling noise |
| 7 (GNDA) | Output A ground | Return path for VOA; may be tied to system low-side ground or left floating for high-side bootstrap operation |
| 8 (VDDA) | Output A supply | 6.5–24 V supply for VOA driver stage; independent of VDDB to support asymmetric rail configurations |
| 9 (VOA) | Output A driver | 4.0 A peak source/sink gate driver output; designed for direct connection to MOSFET/IGBT gates |
| 10 (VDDB) | Output B supply | 6.5–24 V supply for VOB driver stage; enables independent biasing of high- and low-side gate networks |
| 11 (VOB) | Output B driver | 4.0 A peak source/sink gate driver output; fully isolated from VOA and input domain |
| 12 (GNDB) | Output B ground | Return path for VOB; may be tied to separate ground plane or referenced to floating node in isolated DC-DC designs |
| 13 (NC) | No connect | Internally unused; must remain floating or grounded per layout guidelines to avoid coupling noise |
| 14 (NC) | No connect | Internally unused; must remain floating or grounded per layout guidelines to avoid coupling noise |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated drivers | Two fully isolated 4.0 A output channels sharing one input die - eliminates need for two discrete isolators in dual-phase or redundant gate drive designs |
| 5.0 kVRMS reinforced isolation | Meets UL 1577, VDE 60747-17, and CQC GB4943.1 requirements - enables single-component isolation in medical and EV traction inverters requiring 2 MOPP |
| RF-based silicon isolation | No LED aging or temperature drift; 45 ns propagation delay stable over –40°C to +125°C - outperforms optocouplers in timing-critical motor control |
| Automotive-grade qualification | AEC-Q100 Grade 1, IMDS/CAMDS listed, AIAG-compliant PPAP - supports production release for OBC, BMS, and traction inverter modules |
| TTL-compatible inputs with hysteresis | 400 mV input hysteresis rejects EMI in noisy automotive environments - eliminates need for external Schmitt triggers in MCU interface circuits |
Applications
| Onboard Charger (OBC) | Traction Inverter |
|---|---|
Use Scenario: Isolated gate driving for bidirectional AC/DC and DC/DC stages in 11 kW–22 kW EV onboard chargers. IC Role / Device Role / Timing Role: Dual-channel driver controls high-side and low-side SiC MOSFETs in interleaved totem-pole PFC and isolated LLC resonant converters. Use Value: 5.0 kVRMS isolation meets IEC 61851-23 creepage requirements; 4.0 A peak current enables direct drive of 100 nC gate charge devices at 100 kHz. |
Use Scenario: Gate driving for three-phase inverter legs in battery electric vehicle (BEV) traction systems. IC Role / Device Role / Timing Role: One SI8238BD-AS3R per inverter leg provides independent, isolated control of upper and lower IGBTs/SiC FETs. Use Value: –40°C to +125°C operation supports under-hood placement; AEC-Q100 qualification ensures zero-defect manufacturing for safety-critical torque control. |
| Solar Microinverter | Industrial Motor Drive |
Use Scenario: Isolated gate driving in single-phase transformerless microinverters for residential PV systems. IC Role / Device Role / Timing Role: Dual output drives half-bridge switches in H6 or HERIC topologies with independent ground referencing for leakage current reduction. Use Value: SOIC-14 wide-body package meets IEC 62109 creepage requirements; 45 ns propagation delay enables precise PWM synchronization across multiple microinverters. |
Use Scenario: Gate driving for variable-frequency drives (VFDs) in HVAC, pumps, and compressors operating in harsh industrial environments. IC Role / Device Role / Timing Role: Replaces optocoupler-based drivers in 3-phase inverter stacks, supporting 1500 VDC bus voltage with reinforced insulation. Use Value: 5.0 kVRMS isolation and 1500 VDC driver-to-driver differential rating enable compact PCB layouts without air gaps or slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8235BD-AS3R | Same dual-driver configuration, 4.0 A output, 5.0 kVRMS, but in SOIC-16 wide-body package with standard creepage | Lacks increased creepage of SI8238BD-AS3R; unsuitable for IEC 62109-compliant solar microinverters requiring >8 mm creepage | Select SI8235BD-AS3R only when board space allows SOIC-16 and creepage requirements are ≤7.5 mm |
| ADUM4223BRIZ | Analog Devices dual-channel isolator with 4 A output, 5 kVRMS, but uses iCoupler® capacitive isolation and has 55 ns max propagation delay | Higher EMI susceptibility in high-dV/dt motor drive environments; lacks AEC-Q100 qualification for automotive use | Choose ADUM4223BRIZ only for non-automotive industrial applications where capacitive isolation suffices and PPAP is not required |
Compared with SI8235BD-AS3R and ADUM4223BRIZ, the SI8238BD-AS3R uniquely combines SOIC-14 footprint, increased creepage, AEC-Q100 Grade 1 qualification, and RF-based noise immunity-making it the only option qualified for space-constrained, safety-certified automotive OBC and BEV traction inverter designs.
Availability
SI8238BD-AS3R is available at Aetrix Electronics and suitable for onboard chargers, traction inverters, and solar microinverters requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8238BD-AS3R 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 Si823x family was engineered specifically for high-reliability isolated gate driving in automotive electrification and industrial power conversion, emphasizing robustness, safety certification, and system-level integration.
FAQ
What is the isolation voltage rating of the SI8238BD-AS3R?
The SI8238BD-AS3R provides 5.0 kVRMS input-to-output isolation per UL 1577, validated for one minute. This rating supports reinforced insulation in systems with up to 1000 VDC working voltage and satisfies 2 MOPP requirements per IEC 60601-1 for medical and EV applications. The isolation barrier uses Skyworks' proprietary silicon-dielectric technology, not optocouplers or capacitors.
Does the SI8238BD-AS3R include built-in dead time or overlap protection?
No, the SI8238BD-AS3R does not include internal dead time or overlap protection. As a dual-driver variant (not HS/LS), it passes input states directly to outputs with no intentional delay-enabling independent, synchronous switching of two isolated power devices. Dead time must be implemented externally in the controller logic or gate network.
What is the purpose of the NC pins on the SI8238BD-AS3R SOIC-14 package?
Pins 6, 13, and 14 of the SI8238BD-AS3R are designated No Connect (NC) and are internally unused. Per Skyworks' layout guidance, these pins must remain floating or be tied to GNDA/GNDB to minimize parasitic coupling. They are not intended for thermal relief or mechanical anchoring, and soldering them to ground planes requires verification against creepage/clearance rules.
Can the SI8238BD-AS3R drive SiC MOSFETs directly without external buffers?
Yes, the SI8238BD-AS3R can directly drive typical 650 V and 1200 V SiC MOSFETs with gate charges up to ~100 nC at switching frequencies up to 100 kHz. Its 4.0 A peak source/sink current, 45 ns propagation delay, and 2.5 ns rise/fall times (typical) meet the dynamic gate drive demands of modern wide-bandgap devices in EV and solar applications.
Is the SI8238BD-AS3R qualified for automotive applications?
Yes, the SI8238BD-AS3R is an automotive-grade device qualified to AEC-Q100 Grade 1 (–40°C to +125°C), with full automotive process flows, AIAG-compliant PPAP documentation, and IMDS/CAMDS material declarations. Its "-AS3" suffix confirms automotive qualification, and top-side marking includes an N–Z manufacturing code prefix per Skyworks' specification.
SI8238BD-AS3R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 5000Vrms
- 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:
- 14-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8238BD-AS3R FAQ
1.How can I place an order for SI8238BD-AS3R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238BD-AS3R 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 SI8238BD-AS3R reliable?
The price and inventory of SI8238BD-AS3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8238BD-AS3R is usually 5 days.
3.What payment methods are accepted for SI8238BD-AS3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238BD-AS3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238BD-AS3R?
SI8238BD-AS3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238BD-AS3R 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 SI8238BD-AS3R?
For technical support, including SI8238BD-AS3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238BD-AS3R requirements.
6.How does Aetrix verify that SI8238BD-AS3R is sourced from the original manufacturer or authorized distributors?
All SI8238BD-AS3R 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 SI8238BD-AS3R meets industry standards.
7.What is the process for return or replacement of SI8238BD-AS3R?
All SI8238BD-AS3R units undergo pre-shipment inspection (PSI). If there is an issue with SI8238BD-AS3R, 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 SI8238BD-AS3R part is unused and in its original packaging.
Return procedure for SI8238BD-AS3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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