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Skyworks Solutions Inc. SI8234BC-AS1R
- Part No.:
- SI8234BC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8234BC-AS1R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,279
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Product details
Overview
SI8234BC-AS1R from Skyworks Solutions is a 4.0 A peak-output, PWM-input, high-side/low-side isolated gate driver with 3.75 kVRMS input-to-output isolation, 45 ns propagation delay, and integrated programmable dead time control - designed for half-bridge MOSFET/IGBT drive in automotive onboard chargers and industrial inverters.
For engineers reviewing the SI8234BC-AS1R datasheet, SI8234BC-AS1R pinout, SI8234BC-AS1R application, or SI8234BC-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 two confirmed alternative parts with documented functional and application differences.
Technical Context
The SI8234BC-AS1R implements RF-based on/off keying across a silicon isolation barrier, enabling robust noise immunity and eliminating startup initialization. It integrates independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies, with 8 V UVLO threshold and 400 mV hysteresis on TTL-compatible PWM input.
This variant uses a single PWM input to drive complementary high-side (VOA) and low-side (VOB) outputs with programmable dead time via external resistor (DT pin), overlap protection logic, and fast 45 ns propagation (L-H/H-L). Its SOIC-16 narrow-body package supports creepage-critical automotive and industrial layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS per UL 1577 - enables reinforced insulation in 400 VAC systems without additional barrier components |
| Peak Output Current | 4.0 A source/sink - drives 1200 V SiC MOSFETs with <100 ns switching transitions under 1 nF load |
| Propagation Delay | 45 ns max (L-H/H-L) - supports >8 MHz PWM switching with <1% timing error at 100 kHz |
| UVLO Threshold | 8 V (VDDI/VDDA/VDDB) - prevents erratic gate drive during brown-out conditions in 12 V automotive rails |
| Input Compatibility | TTL-level PWM input with >400 mV hysteresis - rejects noise spikes up to ±400 mV on 5 V logic lines |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive use and industrial motor control enclosures |
| AEC-Q100 Grade | Qualified to Grade 1 (–40 °C to +125 °C) - meets automotive reliability and defectivity requirements |
Pinout & Package
SI8234BC-AS1R is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length), optimized for high-density PCB layouts with 3.75 kVRMS isolation and enhanced creepage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Powers internal RF transmitter and logic; requires 4.5–24 V, with 8 V UVLO threshold |
| GNDI | Input-side ground | Reference for PWM input and internal isolation barrier; must be separated from power grounds |
| PWM | Single TTL-compatible input | High-true signal: PWM high → VOA high / VOB low; PWM low → VOA low / VOB high |
| DISABLE | Global output disable | Active-high; forces VOA/VOB low unconditionally when asserted, with tSD < 100 ns |
| VDDA | High-side driver supply | Powers VOA output stage; 4.5–24 V range, 8 V UVLO; connects to bootstrap rail or isolated DC supply |
| GNDA | High-side ground reference | Return path for VOA; floats with high-side switch node; must not connect to system ground |
| VOA | High-side gate drive output | 4.0 A peak source/sink; drives gate of high-side MOSFET/IGBT; referenced to GNDA |
| VDDB | Low-side driver supply | Powers VOB output stage; same voltage range as VDDA; may share rail with VDDA in non-isolated configs |
| GNDB | Low-side ground reference | System ground return for VOB; electrically isolated from GNDA and GNDI |
| VOB | Low-side gate drive output | 4.0 A peak source/sink; drives gate of low-side switch; referenced to GNDB |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT ≈ 10 × RDT ns); floating or tied to VDDI yields ~400 ps nominal |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and CMTI limitations of optocouplers; achieves >100 kV/µs common-mode transient immunity |
| Integrated overlap protection | Hardware-enforced prevention of shoot-through in half-bridge topologies without external logic or timing ICs |
| Programmable dead time | Single-resistor adjustment (0–1 µs range) enables precise tuning for Si, SiC, and GaN FETs across temperature |
| Independent triple UVLO | Separate monitoring of VDDI, VDDA, and VDDB ensures safe shutdown if any supply drops below 8 V |
| Automotive qualification | AEC-Q100 Grade 1, AIAG-compliant PPAP, IMDS/CAMDS listed - supports Tier-1 production traceability |
Applications
| Onboard Charger (OBC) | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolated half-bridge drive for bidirectional AC/DC and DC/DC conversion in 22 kW EV OBC modules. IC Role / Device Role / Timing Role: High-side/low-side gate driver with programmable dead time ensuring shoot-through-free switching of 650 V SiC MOSFETs. Use Value: 45 ns propagation delay and 4.0 A peak current enable >100 kHz ZVS operation, reducing conduction losses by 18% vs. optocoupler-based solutions. |
Use Scenario: Cell-balancing and contactor drive in high-voltage battery packs (400–800 V) requiring reinforced isolation. IC Role / Device Role / Timing Role: Isolated dual-output driver controlling precharge and main contactors with independent UVLO monitoring. Use Value: 3.75 kVRMS isolation and AEC-Q100 qualification meet ISO 26262 ASIL-C requirements for functional safety-critical actuation. |
| Solar Inverter | Traction Inverter |
Use Scenario: Three-phase inverter stage in string and central solar inverters operating at 1000 V DC bus. IC Role / Device Role / Timing Role: PWM-input isolated driver for IGBTs/MOSFETs in NPC and T-type topologies with overlap protection. Use Value: Integrated dead time control eliminates external RC networks, reducing BOM count by 3 components per channel and improving thermal stability. |
Use Scenario: Gate drive for 750 V SiC modules in 400 V and 800 V traction inverters for BEVs and PHEVs. IC Role / Device Role / Timing Role: High-speed, high-current isolated driver supporting >20 kHz switching with <50 ns skew between VOA/VOB. Use Value: 4.0 A peak output sustains gate charge delivery for 100 nC SiC gates at 100 kHz, enabling >99% inverter efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate drive applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8234BD-AS | Same 4.0 A PWM-input HS/LS driver, but 5.0 kVRMS isolation and SOIC-16 wide-body package (7.5 mm width) | Required where reinforced insulation per UL 62368-1 mandates ≥5.0 kVRMS, e.g., industrial UPS and medical power supplies | Select SI8234BD-AS when board layout allows wider creepage/clearance and higher isolation is mandated by end-equipment safety standards |
| UCC5390SCD | TI's 4.5 A isolated gate driver with integrated Miller clamp and 100 kV/µs CMTI, but no programmable dead time or automotive qualification | Used in high-noise industrial motor drives where Miller clamping is critical, but not approved for automotive production | Choose UCC5390SCD only for non-automotive designs needing active Miller clamping; SI8234BC-AS1R remains preferred for AEC-Q100-compliant OBC/BMS |
Compared with SI8234BD-AS, SI8234BC-AS1R trades 1.25 kVRMS isolation margin for narrower SOIC-16 footprint - ideal for space-constrained automotive modules. Against UCC5390SCD, it lacks Miller clamping but delivers certified automotive reliability, programmable dead time, and lower propagation skew - making it the default choice for production EV power electronics.
Availability
SI8234BC-AS1R is available at Aetrix Electronics and suitable for automotive onboard chargers, battery management systems, and solar inverters requiring stable component supply, full AEC-Q100 traceability, and long-term lifecycle support.
Supply support for SI8234BC-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 driving in automotive electrification and industrial power conversion - delivering silicon-isolation performance with AEC-Q100 compliance and system-level safety certification out-of-the-box.
FAQ
What is the isolation voltage rating of the SI8234BC-AS1R and which safety standards does it meet?
The SI8234BC-AS1R provides 3.75 kVRMS input-to-output isolation per UL 1577. It is certified to CSA 62368-1 (reinforced insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1. These approvals validate its use in automotive onboard chargers and industrial inverters requiring reinforced isolation barriers. SI8234BC-AS1R meets all stated ratings without derating.
Does the SI8234BC-AS1R support programmable dead time, and how is it configured?
Yes, the SI8234BC-AS1R supports user-programmable dead time via an external resistor (RDT) connected from the DT pin to ground. Dead time is calculated as DT ≈ 10 × RDT (ns), covering 0–1 µs range. A 0.1 µF ceramic capacitor placed near the DT pin improves noise immunity. SI8234BC-AS1R implements this function in hardware with no firmware or configuration required.
What is the peak output current capability of the SI8234BC-AS1R, and how does it perform under load?
The SI8234BC-AS1R delivers 4.0 A peak source and sink current per output (VOA and VOB). At 12 V supply and 25 °C, it maintains >3.75 A source current into VDD–5 V and >6.5 A sink current into 5 V, enabling direct drive of high-gate-charge SiC MOSFETs (e.g., 100 nC) without external buffers. SI8234BC-AS1R sustains this performance across –40 °C to +125 °C.
How does the SI8234BC-AS1R handle undervoltage conditions on its power supplies?
The SI8234BC-AS1R features independent undervoltage lockout (UVLO) on VDDI, VDDA, and VDDB, each with 8 V turn-on threshold and 400 mV hysteresis. If any supply falls below UVLO–, the corresponding output is forced low. Outputs remain latched low until all supplies exceed UVLO+, preventing partial drive during brown-out. This behavior is intrinsic to SI8234BC-AS1R and requires no external circuitry.
Is the SI8234BC-AS1R qualified for automotive applications, and what documentation is available?
Yes, SI8234BC-AS1R is AEC-Q100 Grade 1 qualified (–40 °C to +125 °C) and supported with AIAG-compliant PPAP documentation, IMDS and CAMDS listings, and full automotive process flow validation. Skyworks provides automotive-grade test reports, failure mode analysis, and lot-level traceability - all standard for SI8234BC-AS1R shipments.
SI8234BC-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:
- 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:
- 200mA, 400mA
- 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, UL, VDE
SI8234BC-AS1R FAQ
1.How can I place an order for SI8234BC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BC-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 SI8234BC-AS1R reliable?
The price and inventory of SI8234BC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234BC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8234BC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BC-AS1R?
SI8234BC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BC-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 SI8234BC-AS1R?
For technical support, including SI8234BC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BC-AS1R requirements.
6.How does Aetrix verify that SI8234BC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8234BC-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 SI8234BC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8234BC-AS1R?
All SI8234BC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BC-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 SI8234BC-AS1R part is unused and in its original packaging.
Return procedure for SI8234BC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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