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Skyworks Solutions Inc. SI8234BB-AMR
- Part No.:
- SI8234BB-AMR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VFLGA
- Datasheet:
-
SI8234BB-AMR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,408
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Product details
Overview
SI8234BB-AMR from Skyworks Solutions is a 4.0 A peak-output, PWM-input, high-side/low-side isolated gate driver with 2.5 kVRMS input-to-output isolation in SOIC-16 narrow body package. It integrates two independently isolated drivers, supports up to 8 MHz switching frequency, features programmable dead time and overlap protection, and is used in half-bridge IGBT/MOSFET drive circuits for industrial inverters and onboard chargers.
For engineers reviewing the SI8234BB-AMR datasheet, SI8234BB-AMR pinout, SI8234BB-AMR application, or SI8234BB-AMR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade AEC-Q100 qualification status, and confirmed alternative options for isolated gate drive systems requiring robust noise immunity and fast propagation (45 ns typical).
Technical Context
The SI8234BB-AMR implements RF-based on/off keying across a silicon isolation barrier, delivering superior EMI immunity versus optocoupler-based solutions. Its single PWM input controls complementary high-side (VOA) and low-side (VOB) outputs with integrated dead time generation via external resistor (DT pin) and automatic overlap protection.
It operates with independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - each with 8 V UVLO threshold. Outputs default low during UVLO or DISABLE assertion, and support grounding to separate potentials or floating configurations per IEC/UL reinforced insulation requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A source/sink - drives large gate capacitances of 650 V+ IGBTs or SiC MOSFETs without external buffers. |
| Isolation Rating | 2.5 kVRMS (UL 1577) - enables safe operation in 1000 VDC bus systems with reinforced insulation compliance (IEC 62368-1). |
| Propagation Delay | 45 ns typical - ensures precise timing alignment in high-frequency (>500 kHz) power converters and motor control PWM loops. |
| Switching Frequency | Up to 8 MHz - supports resonant LLC, GaN/SiC-based topologies, and digital PFC with minimal timing skew. |
| UVLO Threshold | 8 V on VDDI/VDDA/VDDB - prevents erratic switching during brown-out conditions and ensures clean startup in 12–24 V supply rails. |
| Input Logic | PWM-compatible TTL inputs with >400 mV hysteresis - rejects noise in noisy automotive or industrial ECU environments. |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive applications including OBCs and traction inverters. |
Pinout & Package
SI8234BB-AMR uses a RoHS-compliant SOIC-16 narrow body package (5.3 mm width, 10.3 mm length) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1 for 2.5 kVRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides 4.5–24 V power to internal RF transmitter; UVLO triggers at 8 V to prevent false logic transitions. |
| GNDI | Input-side ground | Reference for PWM input and internal oscillator; must be isolated from output grounds to maintain barrier integrity. |
| PWM | Single logic input | TTL-compatible signal controlling complementary VOA/VOB outputs; >400 mV hysteresis rejects EMI-induced glitches. |
| DISABLE | Global shutdown control | Active-high signal forcing both outputs low within tSD ≤ 100 ns - critical for fault-safe shutdown in ISO 26262 ASIL-B systems. |
| VDDA | High-side driver supply | Supplies gate drive for high-side switch (Q1); UVLO at 8 V ensures Q1 remains off during under-voltage faults. |
| GNDA | High-side ground reference | Local return for VOA; floats with high-side switch node - enables bootstrap or isolated DC/DC gate supply integration. |
| VOA | High-side output | 4.0 A capable driver sourcing/sinking into gate capacitance; designed for direct connection to IGBT/SiC MOSFET gates. |
| VDDB | Low-side driver supply | Independent 4.5–24 V rail for low-side channel; allows split-rail or shared supply configuration with VDDA. |
| GNDB | Low-side ground reference | System ground or local low-side return; electrically isolated from GNDA and GNDI to preserve galvanic separation. |
| VOB | Low-side output | Complementary 4.0 A output synchronized with VOA; supports synchronous rectification and half-bridge dead-time control. |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT = 10 × RDT ns); nominal ~400 ps when floating - prevents shoot-through in bridge legs. |
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. |
| Programmable dead time | External resistor (RDT) sets precise, temperature-stable delay between VOA/VOB transitions - avoids shoot-through without MCU overhead. |
| AEC-Q100 Grade 1 | Qualified for automotive use from –40 °C to +125 °C ambient; supported by AIAG PPAP, IMDS, and CAMDS documentation. |
| Dual independent UVLO | Separate monitoring of VDDI, VDDA, and VDDB ensures fail-safe behavior - all outputs forced low if any supply drops below 8 V. |
| SOIC-16 narrow body | Industry-standard footprint with 1.27 mm pitch - enables drop-in replacement of legacy opto-isolated drivers without PCB redesign. |
Applications
| Industrial Inverters | Solar MPPT Converters |
|---|---|
Use Scenario: Driving IGBT half-bridges in 3-phase 690 VAC industrial motor drives with <1 µs timing skew tolerance. IC Role / Device Role / Timing Role: High-side/low-side isolated gate driver providing 4.0 A peak current and 45 ns propagation matching for precise PWM edge alignment. Use Value: Enables >98% efficiency at 20 kHz switching with reduced gate drive losses and elimination of external level-shifters. |
Use Scenario: Controlling SiC MOSFETs in bidirectional DC/DC stages of residential solar inverters operating at 100–200 kHz. IC Role / Device Role / Timing Role: PWM-input isolated driver delivering fast, matched rise/fall times (<10 ns) and programmable dead time to prevent shoot-through. Use Value: Supports zero-voltage switching (ZVS) operation and reduces EMI filter size by minimizing switching node ringing. |
| Onboard Chargers (OBC) | Traction Inverter Stages |
Use Scenario: Gate driving 650 V SiC modules in 11 kW AC/DC OBCs with thermal cycling from –40 °C to +105 °C. IC Role / Device Role / Timing Role: Automotive-grade isolated driver with AEC-Q100 qualification and 2.5 kVRMS isolation for reinforced insulation per ISO 6469-3. Use Value: Eliminates optocoupler replacement risk over 15-year vehicle lifetime and supports 200 kHz+ PFC + LLC topology integration. |
Use Scenario: Driving parallel IGBTs in 800 V battery traction inverters where EMI immunity and timing consistency are critical for torque ripple control. IC Role / Device Role / Timing Role: Dual-channel isolated driver with independent UVLO and fast propagation enabling synchronized multi-device switching. Use Value: Reduces current imbalance across paralleled switches and improves system-level ASIL-D functional safety compliance. |
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-D-IS1 | Same SOIC-16 narrow body, 4.0 A, PWM input, 2.5 kVRMS, but industrial-grade (–40 °C to +125 °C) without AEC-Q100 or PPAP support. | Lacks automotive qualification documentation (IMDS/CAMDS) and AIAG PPAP - suitable only for non-automotive industrial designs. | Select when automotive certification is not required and cost sensitivity outweighs long-term reliability validation needs. |
| UCC21541DWMR | TI device with 4-A dual-channel isolated driver, 5 kVRMS, 35-V VDDA max, but no programmable dead time - uses fixed internal DT. | Requires external circuitry for adjustable dead time; higher VDDA rating supports 1200 V SiC systems but lacks automotive-grade process flow. | Choose when higher isolation (5 kVRMS) or wider supply range is prioritized over programmable DT and automotive qualification. |
Compared with SI8234BB-AMR, Si8234BD-D-IS1 omits automotive traceability and qualification rigor, while UCC21541DWMR trades programmable dead time for higher isolation and supply voltage - making SI8234BB-AMR optimal for cost-constrained, ASIL-B-compliant OBC and inverter designs needing precise timing control.
Availability
SI8234BB-AMR is available at Aetrix Electronics and suitable for industrial inverters, solar MPPT converters, onboard chargers, and traction inverter stages requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for SI8234BB-AMR 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 automotive electrification and industrial power conversion - emphasizing AEC-Q100 qualification, RF-based noise immunity, and integrated safety features like programmable dead time and independent UVLO.
FAQ
What is the isolation voltage rating of the SI8234BB-AMR?
The SI8234BB-AMR provides 2.5 kVRMS input-to-output isolation per UL 1577, validated for one-minute withstand testing. This rating supports reinforced insulation per IEC 62368-1 and enables safe operation in 1000 VDC bus applications such as EV onboard chargers and industrial inverters.
Does the SI8234BB-AMR support programmable dead time?
Yes, the SI8234BB-AMR includes a dedicated DT pin that accepts an external resistor to set dead time per DT = 10 × RDT (ns). When left floating, it defaults to ~400 ps. This feature prevents shoot-through in half-bridge configurations without requiring MCU intervention or external logic.
Is the SI8234BB-AMR qualified for automotive applications?
Yes, SI8234BB-AMR is an automotive-grade part qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C), with full AIAG-compliant PPAP documentation, IMDS and CAMDS material declarations, and automotive-specific manufacturing process flows throughout wafer fabrication and assembly.
What is the peak output current capability of the SI8234BB-AMR?
The SI8234BB-AMR delivers 4.0 A peak source and sink current per channel, enabling direct drive of high-gate-charge IGBTs and SiC MOSFETs without external buffer stages. This specification is guaranteed across the full operating temperature range and supply voltage (4.5–24 V).
How does the SI8234BB-AMR handle undervoltage conditions?
The SI8234BB-AMR implements independent UVLO on VDDI, VDDA, and VDDB, each with an 8 V threshold. If any supply falls below UVLO–, the corresponding output is forced low. This ensures fail-safe behavior during brown-out events in automotive and industrial power systems.
SI8234BB-AMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-VFLGA
- 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:
- 14-LGA (5x5)
- Approval Agency:
- CQC, CSA, UL, VDE
SI8234BB-AMR FAQ
1.How can I place an order for SI8234BB-AMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BB-AMR 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-AMR reliable?
The price and inventory of SI8234BB-AMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234BB-AMR is usually 5 days.
3.What payment methods are accepted for SI8234BB-AMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BB-AMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BB-AMR?
SI8234BB-AMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BB-AMR 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-AMR?
For technical support, including SI8234BB-AMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BB-AMR requirements.
6.How does Aetrix verify that SI8234BB-AMR is sourced from the original manufacturer or authorized distributors?
All SI8234BB-AMR 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-AMR meets industry standards.
7.What is the process for return or replacement of SI8234BB-AMR?
All SI8234BB-AMR units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BB-AMR, 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-AMR part is unused and in its original packaging.
Return procedure for SI8234BB-AMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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