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Skyworks Solutions Inc. SI8234BB-ASR
- Part No.:
- SI8234BB-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8234BB-ASR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
SI8234BB-ASR from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input, 4.0 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow body package. It integrates two independent isolated drivers for half-bridge MOSFET/IGBT control in power inverters and motor drives.
For engineers reviewing the SI8234BB-ASR datasheet, SI8234BB-ASR pinout, SI8234BB-ASR application, or SI8234BB-ASR equivalent, this page delivers verified specifications, automotive-grade qualification (AEC-Q100), UVLO thresholds, dead-time programmability, and real-world use context for isolated gate drive design.
Technical Context
The SI8234BB-ASR implements RF-based silicon isolation with a proprietary semiconductor barrier, enabling 45 ns propagation delay and robust noise immunity. Its single PWM input controls complementary high-side and low-side outputs with built-in overlap protection and user-programmable dead time via external resistor.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - each with 8 V turn-on threshold - and supports operation from –40 °C to +125 °C. Outputs are TTL-compatible with >400 mV hysteresis and can sink up to 7 A or source up to 4 A under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation across reinforced insulation barriers in industrial and automotive systems |
| Peak Output Current | 4.0 A - sufficient to directly drive high-capacitance power MOSFETs/IGBTs without external buffers |
| Propagation Delay | 45 ns max - ensures precise timing alignment in high-frequency switching applications up to 8 MHz |
| UVLO Threshold | 8 V (VDDI/VDDA/VDDB) - prevents erratic gate behavior during brown-out or startup transients |
| Input Type | PWM - single-input logic simplifies controller interface versus dual-input variants |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| AEC-Q100 Grade | Qualified - meets automotive reliability requirements including zero-defect manufacturing flow and PPAP support |
Pinout & Package
SI8234BB-ASR uses a RoHS-compliant SOIC-16 narrow body package (5.3 mm width) with 1.27 mm pitch and 2.5 kVRMS isolation rating. Creepage and clearance meet IEC 60664-1 for reinforced insulation at 2.5 kV.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides power to isolated input die; must be ≥8 V to exit UVLO |
| GNDI | Input-side ground | Reference for PWM input and internal oscillator; galvanically isolated from output grounds |
| PWM | Single logic input | TTL-compatible with >400 mV hysteresis; high = VOA high / VOB low |
| DISABLE | Global output disable | Active-high signal forces both outputs low regardless of PWM state |
| VDDA | High-side driver supply | Power for VOA output stage; UVLO active if <8 V |
| VOA | High-side gate output | 4.0 A source/sink capable; connects to gate of high-side switch (e.g., Q1 in half-bridge) |
| GNDA | High-side ground reference | Local return for VOA; floats with high-side potential |
| VDDB | Low-side driver supply | Power for VOB output stage; UVLO active if <8 V |
| VOB | Low-side gate output | 4.0 A source/sink capable; connects to gate of low-side switch (e.g., Q2 in half-bridge) |
| GNDB | Low-side ground reference | System ground reference for VOB; tied to power stage source/emitter |
| DT | Dead-time programming | Resistor-to-ground sets dead time (DT ≈ 10 × RDT ns); floating = ~400 ps nominal |
| NC | No connect | Internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in one package | Eliminates need for two discrete isolators; reduces PCB area and BOM count in half-bridge designs |
| PWM input architecture | Simplifies MCU/FPGA interface by replacing dual GPIOs with single PWM channel and internal logic |
| Programmable dead time | Enables precise tuning of shoot-through prevention without external timing circuitry or complex controller code |
| Independent UVLO per supply rail | Prevents partial operation during asymmetric supply faults - critical for system safety in automotive OBCs and inverters |
| AEC-Q100 qualified automotive grade | Validated for automotive production use with AIAG-compliant PPAP, IMDS/CAMDS data, and zero-defect methodology |
Applications
| Onboard Charger (OBC) | Battery Management System (BMS) |
|---|---|
Use Scenario: Controls half-bridge IGBTs in AC/DC and DC/DC stages of EV onboard chargers operating at 1–2 kW. IC Role / Device Role / Timing Role: High-side/low-side isolated gate driver with PWM input and programmable dead time for synchronous rectification and phase-shifted full-bridge topologies. Use Value: 4.0 A drive strength ensures fast MOSFET/IGBT switching at 100+ kHz, reducing conduction losses and thermal stress in compact OBC modules. | Use Scenario: Drives isolated gate signals for cell-balancing FETs and contactor control in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: Dual-channel isolated driver providing reinforced insulation between microcontroller domain and high-voltage battery domain. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification ensure functional safety compliance (ISO 26262 ASIL-B ready) and long-term reliability in harsh pack environments. |
| Traction Inverter | Solar Inverter |
Use Scenario: Gate driving SiC MOSFETs in motor phase legs of hybrid/electric vehicle traction inverters. IC Role / Device Role / Timing Role: High-speed isolated driver with 45 ns propagation delay and 8 MHz max switching frequency supporting wide-bandgap device requirements. Use Value: Low propagation skew and tight timing specs enable precise PWM edge alignment across multiple channels, minimizing torque ripple and EMI. | Use Scenario: Controlling H-bridge and transformer-isolated DC/AC stages in string and central solar inverters (3–10 kW). IC Role / Device Role / Timing Role: Isolated high-side/low-side driver interfacing with DSP/FPGA controllers to drive IGBTs or Si-MOSFETs in grid-tied converters. Use Value: SOIC-16 narrow body footprint allows dense layout in space-constrained inverter enclosures while maintaining creepage for 1000 V DC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8234BD-ASR | Same PWM input, 4.0 A output, but 5.0 kVRMS isolation and SOIC-16 wide body package | Required where reinforced insulation demands exceed 2.5 kVRMS (e.g., medical 2 MOPP, industrial 4000 V surge) | Select when higher isolation voltage is mandated by end-equipment safety standards |
| UCC21540ADWPR | TI part with dual 4-A outputs, 5.7 kVRMS isolation, and integrated Miller clamp; requires separate enable/control logic | Used in high-reliability industrial inverters where active Miller clamping improves robustness against dV/dt-induced turn-on | Choose when enhanced short-circuit protection and tighter timing control justify added complexity and cost |
Compared with Si8234BD-ASR, SI8234BB-ASR offers lower isolation voltage but smaller SOIC-16 narrow body footprint for space-constrained layouts; versus UCC21540ADWPR, it provides simpler PWM-only interface and no Miller clamp, making it ideal for cost-sensitive automotive OBCs where layout density and qualification maturity are prioritized.
Availability
SI8234BB-ASR is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and solar inverters requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8234BB-ASR 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 isolated gate driving in high-efficiency power conversion systems, targeting automotive electrification, renewable energy, and industrial motor control applications.
FAQ
What is the isolation voltage rating of the SI8234BB-ASR?
The SI8234BB-ASR has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one minute. This level supports reinforced insulation in 400–600 V DC bus applications such as EV onboard chargers and solar string inverters, and is distinct from the 5.0 kVRMS variant (e.g., SI8234BD-ASR) used in higher-safety-demand systems.
Does the SI8234BB-ASR support programmable dead time?
Yes, the SI8234BB-ASR includes a dedicated DT pin that accepts an external resistor to ground, allowing dead time to be set from ~400 ps (floating pin) up to several hundred nanoseconds using Equation DT ≈ 10 × RDT (ns). This feature prevents shoot-through in half-bridge configurations without requiring controller-level timing adjustments.
What is the UVLO threshold for the SI8234BB-ASR inputs and outputs?
The SI8234BB-ASR specifies an 8 V turn-on UVLO threshold for all three supply domains: VDDI (input side), VDDA (high-side driver), and VDDB (low-side driver). Each domain has independent monitoring, ensuring outputs remain low until their respective supply reaches 8 V, preventing undefined states during power sequencing.
Is the SI8234BB-ASR qualified for automotive applications?
Yes, the SI8234BB-ASR is an automotive-grade part (denoted by "-A" suffix and "-ASR" tape-and-reel packaging). It is fully AEC-Q100 qualified, manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect methodology throughout production.
How does the PWM input logic work on the SI8234BB-ASR?
On the SI8234BB-ASR, a high PWM input drives VOA high and VOB low; a low PWM input drives VOA low and VOB high. This complementary behavior is hardwired internally - no external logic or controller firmware inversion is needed. The input is TTL-compatible with >400 mV hysteresis for noise immunity.
SI8234BB-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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):
- 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, UL, VDE
SI8234BB-ASR FAQ
1.How can I place an order for SI8234BB-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BB-ASR 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 SI8234BB-ASR reliable?
The price and inventory of SI8234BB-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234BB-ASR is usually 5 days.
3.What payment methods are accepted for SI8234BB-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BB-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BB-ASR?
SI8234BB-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BB-ASR 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 SI8234BB-ASR?
For technical support, including SI8234BB-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BB-ASR requirements.
6.How does Aetrix verify that SI8234BB-ASR is sourced from the original manufacturer or authorized distributors?
All SI8234BB-ASR 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 SI8234BB-ASR meets industry standards.
7.What is the process for return or replacement of SI8234BB-ASR?
All SI8234BB-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BB-ASR, 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 SI8234BB-ASR part is unused and in its original packaging.
Return procedure for SI8234BB-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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