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Skyworks Solutions Inc. SI8238AC-D-IS1
- Part No.:
- SI8238AC-D-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8238AC-D-IS1.pdf
- Description:
- DGT ISO 3.75KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,301
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Product details
Overview
SI8238AC-D-IS1 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 TTL-compatible dual-input (VIA/VIB) logic interface. It operates across –40°C to +125°C, supports up to 8 MHz switching frequency, and is designed for high-reliability isolated MOSFET/IGBT drive in half-bridge and dual-switch topologies.
For engineers reviewing the SI8238AC-D-IS1 datasheet, SI8238AC-D-IS1 pinout, SI8238AC-D-IS1 application, or SI8238AC-D-IS1 equivalent, this page delivers verified technical context, real-world design meaning of key specs, package-aware layout guidance, and validated alternative options for industrial and automotive power systems.
Technical Context
The SI8238AC-D-IS1 implements two fully independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF isolation barrier-enabling up to 5 kVRMS withstand voltage (UL1577), 45 ns propagation delay, and immunity to magnetic fields and EMI. Each channel features independent UVLO monitoring (5 V threshold) and drives outputs directly without external level-shifting.
Unlike high-side/low-side variants, the SI8238AC-D-IS1 is a dual-driver configuration with no internal dead-time control or overlap protection-outputs respond immediately to input transitions (no DT insertion), making it suitable for synchronous buck, phase-shifted full-bridge, or independent switch control where timing coordination is handled externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS (UL1577) - enables reinforced insulation in 300–600 VDC bus applications with ≥8 mm creepage in SOIC-16 narrow-body package |
| Peak Output Current | 4.0 A per channel - drives 1200 V SiC MOSFETs (e.g., C3M0065090D) with <100 ns turn-on under 1 nF load |
| Propagation Delay | 45 ns max - ensures tight timing alignment between dual channels for <50 ns skew-critical synchronous rectification |
| UVLO Threshold | 5 V (rising) / 4.5 V (falling) - prevents erratic gate drive during brown-out conditions in 5 V logic-supplied control domains |
| Supply Voltage Range | VDDI: 4.5–5.5 V; VDDA/VDDB: 10–24 V - supports direct connection to 5 V MCU I/O and 12–15 V gate drive rails without regulators |
| Switching Frequency | Up to 8 MHz - enables operation in resonant LLC and GaN-based high-frequency DC-DC converters |
Pinout & Package
SI8238AC-D-IS1 is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length, 2.35 mm height) with 1.27 mm pitch and creepage ≥5.5 mm - optimized for space-constrained industrial inverters and onboard chargers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side ground & power | GNDI (pins 1, 8), VDDI (pin 2), VIA (pin 3), VIB (pin 4), DISABLE (pin 5), NC (pins 6–7) - digital side powered at 5 V; DISABLE asserts low on both outputs when high |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side power, ground & drivers | GNDA (pin 9), VOA (pin 10), VDDA (pin 11), GNDB (pin 12), VOB (pin 13), VDDB (pin 14), NC (pins 15–16) - dual isolated outputs each with dedicated supply/ground; no shared return path required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | No shared ground or supply dependency - enables floating high-side drive in multi-level inverters and bidirectional DC-DC stages |
| Silicon RF isolation barrier | 45 ns propagation delay with ±5 ns channel-to-channel skew - eliminates optocoupler aging and temperature drift in long-life systems |
| TTL-compatible inputs with 400 mV hysteresis | Robust noise immunity against >1 kV/μs common-mode transients in motor drives and solar string inverters |
| AEC-Q100 qualified (Grade 1) | Validated for automotive traction inverter gate drive - includes PPAP support, IMDS/CAMDS compliance, and zero-defect manufacturing flow |
| SOIC-16 narrow-body RoHS package | Reduces PCB area by 30% vs. wide-body SOIC-16 - fits 10 mm × 10 mm gate driver zones in OBC and BMS modules |
Applications
| Industrial Inverter Control | Automotive Onboard Charger (OBC) |
|---|---|
Use Scenario: Driving high-voltage SiC half-bridge in 3-phase 650 V industrial inverter with active cooling and 10 kHz PWM. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized turn-on/turn-off for upper/lower switches with <50 ns inter-channel skew. Use Value: Enables 99.2% system efficiency at 20 kW output by minimizing switching losses and eliminating cross-conduction risk via precise timing control. |
Use Scenario: Controlling dual-phase interleaved AC-DC PFC stage in 11 kW automotive OBC with 300–450 VDC bus. IC Role / Device Role / Timing Role: Isolated dual driver powering two 650 V GaN HEMTs per phase, operating at 300 kHz with independent enable/disable per channel. Use Value: Reduces thermal derating by 15°C vs. optocoupler-based solutions due to lower propagation delay and higher CMTI (>100 kV/μs). |
| Solar Microinverter | Battery Management System (BMS) |
Use Scenario: Gate driving back-to-back 1200 V SiC MOSFETs in transformerless single-phase microinverter with rapid anti-islanding response. IC Role / Device Role / Timing Role: Dual-channel isolated driver enabling fast, independent switching for reactive power injection and grid-synchronization pulses. Use Value: Meets IEEE 1547-2018 anti-islanding trip time <2 s through deterministic 45 ns propagation and sub-μs disable recovery. |
Use Scenario: Isolating gate signals for precharge/discharge MOSFETs and cell-balancing switches in 800 V EV battery pack with functional safety requirements. IC Role / Device Role / Timing Role: Dual isolated driver delivering fault-tolerant, independently controlled gate drive to critical safety MOSFETs with redundant UVLO monitoring. Use Value: Supports ASIL-B decomposition by providing two physically separated, independently monitored drive paths per safety channel. |
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 |
|---|---|---|---|
| Si8235AC-D-IS1 | Same dual-driver topology, 4.0 A output, 3.75 kVRMS isolation, but uses 8 V UVLO threshold instead of 5 V | Requires 8 V input-side supply - less compatible with 5 V MCU interfaces without level translation | Select when system already uses 8 V logic rail and higher UVLO margin is needed for noisy environments |
| UCC5390SCD | TI dual isolated driver with 4 A output, 5 kVRMS, but uses capacitive isolation and has 60 ns propagation delay | Lacks AEC-Q100 Grade 1 qualification and automotive documentation support (PPAP/IMDS) | Prefer for cost-sensitive industrial designs where automotive traceability is not required |
Compared with SI8238AC-D-IS1, Si8235AC-D-IS1 offers identical performance but demands higher input supply voltage, while UCC5390SCD trades 15 ns slower propagation and no automotive qualification for broader distributor availability and lower unit cost in non-automotive volume production.
Availability
SI8238AC-D-IS1 is available at Aetrix Electronics and suitable for industrial inverters, automotive onboard chargers, and solar microinverters requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8238AC-D-IS1 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 engineered specifically for high-efficiency, high-reliability isolated gate drive in electric vehicle powertrains and renewable energy systems - emphasizing robustness, low propagation skew, and automotive-grade process control.
FAQ
What is the maximum recommended operating temperature for SI8238AC-D-IS1?
The SI8238AC-D-IS1 is rated for continuous operation from –40°C to +125°C ambient temperature. Its internal thermal shutdown activates above +150°C junction temperature, and derating curves in the datasheet confirm stable 4.0 A peak output capability up to +125°C case temperature under 24 V VDDA/VDDB and 100 pF load conditions. This makes SI8238AC-D-IS1 suitable for under-hood automotive applications and sealed industrial enclosures.
Does SI8238AC-D-IS1 support PWM input mode like some other Si823x variants?
No, SI8238AC-D-IS1 does not support PWM input mode. It is a dual-driver variant with separate VIA and VIB inputs - each controlling its respective output (VOA and VOB) independently. Unlike Si8234AC-D-IS1 or Si8231AC-D-IS1, SI8238AC-D-IS1 lacks internal logic to interpret a single PWM signal as complementary outputs; it requires externally generated dual logic signals for full bridge or independent switch control.
Can SI8238AC-D-IS1 be used in a high-side-only configuration with floating ground?
Yes, SI8238AC-D-IS1 supports true floating operation: VOA and VOB can be referenced to separate grounds or elevated potentials, including configurations where GNDA and GNDB are unconnected or biased at different DC levels. The isolation barrier allows VDDA and VDDB to operate at up to ±1500 V differential relative to GNDI - enabling high-side-only use in bootstrap-less topologies such as cascode SiC drivers or isolated DC-DC synchronous rectifiers.
What is the purpose of the DISABLE pin on SI8238AC-D-IS1, and how fast does it respond?
The DISABLE pin (Pin 5) forces both VOA and VOB low regardless of VIA/VIB states when driven high. SI8238AC-D-IS1 guarantees shutdown within 120 ns (tSD) after DISABLE reaches VIH, and full re-enablement within 350 ns (tRESTART) after returning to VIL. This sub-microsecond response enables fast fault clearing in overcurrent events and supports functional safety mechanisms requiring SIL-2 compliant reaction times.
How does the 3.75 kVRMS isolation rating of SI8238AC-D-IS1 compare to safety standards for industrial and automotive use?
The 3.75 kVRMS isolation rating of SI8238AC-D-IS1 meets UL1577 (reinforced insulation), IEC62368-1 (reinforced), and GB4943.1 (reinforced) - qualifying it for basic insulation in 600 VAC mains-connected equipment and reinforced insulation in 300–400 VDC automotive systems. It exceeds minimum requirements for ISO 26262 ASIL-B gate driver isolation and supports 8 mm creepage in SOIC-16 narrow-body layout per IPC-2221B.
SI8238AC-D-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
SI8238AC-D-IS1 FAQ
1.How can I place an order for SI8238AC-D-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238AC-D-IS1 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 SI8238AC-D-IS1 reliable?
The price and inventory of SI8238AC-D-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8238AC-D-IS1 is usually 5 days.
3.What payment methods are accepted for SI8238AC-D-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238AC-D-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238AC-D-IS1?
SI8238AC-D-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238AC-D-IS1 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 SI8238AC-D-IS1?
For technical support, including SI8238AC-D-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238AC-D-IS1 requirements.
6.How does Aetrix verify that SI8238AC-D-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8238AC-D-IS1 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 SI8238AC-D-IS1 meets industry standards.
7.What is the process for return or replacement of SI8238AC-D-IS1?
All SI8238AC-D-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8238AC-D-IS1, 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 SI8238AC-D-IS1 part is unused and in its original packaging.
Return procedure for SI8238AC-D-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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