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Skyworks Solutions Inc. SI8237AC-AS1R
- Part No.:
- SI8237AC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8237AC-AS1R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
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Product details
Overview
SI8237AC-AS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 0.5 A peak output current, 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 automotive onboard chargers and industrial inverters.
For engineers reviewing the SI8237AC-AS1R datasheet, SI8237AC-AS1R pinout, SI8237AC-AS1R application, or SI8237AC-AS1R equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade safety certifications (AEC-Q100, UL 1577, VDE 60747-17), and confirmed alternative options for dual-driver isolated gate drive systems.
Technical Context
The SI8237AC-AS1R implements two fully independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF isolation barrier - not optocoupler-based - enabling 45 ns typical propagation delay and high electromagnetic immunity. Each channel features dedicated UVLO monitoring (5 V threshold) and direct TTL-level inputs without external level-shifting.
Unlike high-side/low-side variants (e.g., SI8230/3), the SI8237AC-AS1R is a dual-driver configuration with no internal dead-time control or overlap protection; outputs respond immediately to input transitions. Its SOIC-16 narrow-body package provides 3.75 kVRMS isolation with creepage/clearance compliant to reinforced insulation standards per IEC 62368-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS per UL 1577 - enables safe operation in 600–800 Vdc bus systems with reinforced insulation compliance. |
| Peak Output Current | 0.5 A per channel - sufficient to drive medium-power MOSFETs (e.g., 10–30 nC gate charge) at ≤100 kHz switching. |
| Propagation Delay | 45 ns max - supports precise timing-critical half-bridge and phase-shifted topologies up to 8 MHz. |
| UVLO Threshold | 5 V (rising), 4.5 V (falling) - prevents erratic gate drive during brown-out conditions in automotive 12 V rail environments. |
| Supply Voltage Range | VDDI: 4.5–5.5 V; VDDA/VDDB: 10–24 V - allows flexible power domain separation between logic and power stages. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive use and industrial motor control enclosures. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C) - meets automotive reliability requirements including HTOL, TC, and ESD testing. |
Pinout & Package
SI8237AC-AS1R uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length) with 0.635 mm pitch and 1.27 mm creepage between input and output sides per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side ground and supply | GNDI (pins 1, 8), VDDI (pin 2), VIA (pin 3), VIB (pin 4), DISABLE (pin 5), NC (pins 6–7) - logic-side interface powered from 4.5–5.5 V rail. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side drivers and grounds | VOA (pin 9), GNDA (pin 10), VDDA (pin 11), VOB (pin 12), GNDB (pin 13), VDDB (pin 14), NC (pins 15–16) - dual independent gate drive outputs referenced to separate power domains. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | No shared timing or control logic - enables asynchronous gate drive for dual-phase converters or redundant safety paths. |
| Silicon RF isolation barrier | Eliminates LED aging and CTR degradation; achieves 45 ns propagation delay and >100 kV/µs common-mode transient immunity (CMTI). |
| TTL-compatible inputs with 400 mV hysteresis | Direct interface with MCU GPIOs or PWM controllers without external Schmitt triggers or level shifters. |
| Individual UVLO per side | VDDI, VDDA, and VDDB each monitored independently - ensures safe shutdown if any supply drops below operational threshold. |
| AEC-Q100 qualified automotive grade | Full PPAP support, IMDS/CAMDS compliance, zero-defect manufacturing flow - suitable for ASIL-B system integration. |
Applications
| Onboard Charger (OBC) | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolated gate drive for bidirectional AC/DC and DC/DC stages in 3.3–22 kW EV onboard chargers. IC Role / Device Role / Timing Role: Dual-channel driver controlling high-side and low-side SiC MOSFETs in interleaved totem-pole PFC and LLC resonant converter stages. Use Value: 3.75 kVRMS isolation and AEC-Q100 qualification ensure safety and longevity in 400–800 V battery systems with frequent thermal cycling. |
Use Scenario: Cell-balancing switch control and contactor drive in high-voltage traction battery packs (up to 900 V). IC Role / Device Role / Timing Role: Independent isolated drivers for active balancing FETs and main pack disconnect relays, decoupled from MCU ground. Use Value: Dual-channel independence prevents single-point failure; 5 V UVLO aligns with BMS controller supply rails for coordinated fault response. |
| Solar Inverter | Industrial Motor Drive |
Use Scenario: Gate drive for H-bridge and NPC topology IGBTs/MOSFETs in string and central solar inverters. IC Role / Device Role / Timing Role: Dual driver enabling synchronous control of upper/lower switches in three-phase inverter legs with independent ground referencing. Use Value: 8 MHz max switching capability supports advanced MPPT algorithms and high-frequency transformer isolation in compact designs. |
Use Scenario: Isolated gate drive for 3-phase IGBT modules in HVAC compressors, pumps, and servo drives (0.75–7.5 kW). IC Role / Device Role / Timing Role: Direct replacement for optocoupler-based drivers in existing PCB layouts, maintaining same SOIC-16 footprint. Use Value: 45 ns propagation delay minimizes shoot-through risk in fast-switching vector-controlled motors; SOIC-16 NB fits space-constrained control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated gate drive applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8232AD-AS | Same dual-driver function, but 5.0 kVRMS isolation and SOIC-16 wide-body package (7.5 mm width). | Required where higher isolation (e.g., medical or industrial mains-connected systems) mandates 5 kVRMS reinforced insulation. | Select when creepage >8.0 mm and 5 kVRMS UL/VDE certification are mandatory; board layout must accommodate wider SOIC. |
| UCC5390SCDR | TI's dual-channel isolated driver with 3.75 kVRMS, 0.8 A peak output, and integrated Miller clamp - no UVLO hysteresis spec provided. | Preferred for high-noise motor drive environments needing active Miller clamping to prevent spurious turn-on. | Choose when driving high-dV/dt SiC devices where Miller clamping is critical; verify compatibility with 5 V logic interface. |
Compared with SI8237AC-AS1R, SI8232AD-AS offers higher isolation margin at the cost of larger PCB area, while UCC5390SCDR adds Miller clamping functionality but lacks specified UVLO hysteresis - making SI8237AC-AS1R optimal for cost-sensitive, space-constrained automotive OBC and BMS designs requiring proven AEC-Q100 reliability.
Availability
SI8237AC-AS1R is available at Aetrix Electronics and suitable for automotive onboard chargers, battery management systems, and industrial solar inverters requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SI8237AC-AS1R 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-reliability isolated gate drive in electric vehicle powertrain and renewable energy systems - combining silicon isolation, automotive qualification, and flexible dual/high-side-low-side configurations.
FAQ
What is the isolation voltage rating of the SI8237AC-AS1R?
The SI8237AC-AS1R has a certified 3.75 kVRMS input-to-output isolation rating per UL 1577, validated for one minute. This rating supports reinforced insulation in 600–800 Vdc systems and complies with IEC 62368-1 and VDE 60747-17 standards. The isolation barrier uses Skyworks' proprietary silicon RF technology, not optocouplers.
Does the SI8237AC-AS1R include dead-time control or overlap protection?
No, the SI8237AC-AS1R is a dual-driver configuration (not high-side/low-side), so it does not implement internal dead-time control or overlap protection. Outputs VOA and VOB transition immediately in response to VIA and VIB inputs - confirmed in Table 5 (Si8232/5/7/8 Truth Table) of the datasheet. Dead time must be managed externally by the controller.
What is the UVLO threshold for the SI8237AC-AS1R input supply (VDDI)?
The SI8237AC-AS1R has a 5 V rising UVLO threshold (VDDIUV+) and 4.5 V falling threshold (VDDIUV–) on the input side (VDDI). This ensures reliable startup and shutdown behavior in automotive 5 V MCU domains and prevents false triggering during rail droop - explicitly documented in Table 1 and Section 2.6 of the datasheet.
Can the SI8237AC-AS1R drive both N-channel and P-channel MOSFETs?
Yes, the SI8237AC-AS1R outputs are non-inverting, push-pull drivers capable of sourcing and sinking current. VOA and VOB can directly drive N-channel MOSFET gates (high-side with bootstrap, low-side grounded) or P-channel devices (with appropriate level-referenced VDDA/VDDB supplies), as confirmed by the functional block diagram (Figure 3) and electrical characteristics (Figures 14–17).
Is the SI8237AC-AS1R pin-compatible with other Si823x dual-driver variants?
Yes - all Si823x dual-driver variants (e.g., SI8232, SI8235, SI8237, SI8238) share identical SOIC-16 pinouts regardless of isolation rating (2.5/3.75/5.0 kVRMS) or UVLO voltage (5 V or 8 V). Pin mapping is consistent across the family, enabling drop-in substitution where isolation and UVLO specs align with system requirements.
SI8237AC-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823x
- 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):
- 45ns, 45ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 20ns, 20ns (Max)
- Current - Output High, Low:
- 250mA, 500mA
- Current - Peak Output:
- 500mA
- 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, UL, VDE
SI8237AC-AS1R FAQ
1.How can I place an order for SI8237AC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8237AC-AS1R 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 SI8237AC-AS1R reliable?
The price and inventory of SI8237AC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8237AC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8237AC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8237AC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8237AC-AS1R?
SI8237AC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8237AC-AS1R 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 SI8237AC-AS1R?
For technical support, including SI8237AC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8237AC-AS1R requirements.
6.How does Aetrix verify that SI8237AC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8237AC-AS1R 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 SI8237AC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8237AC-AS1R?
All SI8237AC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8237AC-AS1R, 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 SI8237AC-AS1R part is unused and in its original packaging.
Return procedure for SI8237AC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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