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Skyworks Solutions Inc. SI8234BD-C-ISR
- Part No.:
- SI8234BD-C-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8234BD-C-ISR.pdf
- Description:
- DGTL ISO 5KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,693
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Product details
Overview
SI8234BD-C-ISR from Silicon Labs is a 4.0 A peak-output, high-side/low-side isolated gate driver with 5 kVRMS input-to-output isolation, 60 ns max propagation delay, and programmable dead time. It features PWM input configuration, operates from 6.5–24 V driver supply, and is designed for IGBT/MOSFET driving in solar inverters and motor control systems.
For engineers reviewing the SI8234BD-C-ISR datasheet, SI8234BD-C-ISR pinout, SI8234BD-C-ISR application, or SI8234BD-C-ISR equivalent, this page delivers verified technical context, safety-certified isolation specs, real-world timing behavior, and validated alternative options for high-reliability power stage design.
Technical Context
The SI8234BD-C-ISR implements RF-based on/off keying across a silicon isolation barrier, enabling robust noise immunity without startup initialization. Its dual-channel architecture supports independent high-side and low-side gate drive with overlap protection triggered by simultaneous active inputs.
It integrates programmable dead time via external resistor (70–900 ns range), supports TTL-compatible PWM input with >400 mV hysteresis, and maintains operation across –40 to +125 °C ambient with undervoltage lockout on both input (2.10–2.5 V) and driver supplies (5–12.5 V thresholds).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A sink/source per channel - drives high-capacitance IGBTs and fast-switching SiC MOSFETs without external buffers. |
| Isolation Rating | 5 kVRMS (UL1577) - certified reinforced insulation for 600 VRMS working voltage in industrial and solar applications. |
| Propagation Delay | ≤60 ns (max) - enables precise timing control at switching frequencies up to 8 MHz with minimal skew between channels. |
| Common-Mode Transient Immunity | ≥45 kV/µs - suppresses false triggering in noisy high-dV/dt environments like motor drives and inverters. |
| Operating Temperature | –40 to +125 °C - supports full performance in under-hood automotive and industrial ambient conditions. |
| Input Logic | PWM input with >400 mV hysteresis - rejects noise on single-wire control lines without external Schmitt triggers. |
| Dead Time Programmability | 70–900 ns via RDT (6–100 kΩ) - prevents shoot-through in half-bridge topologies without MCU intervention. |
Pinout & Package
SI8234BD-C-ISR is housed in a RoHS-compliant SOIC-16 wide-body package (WBSOIC-16) with 8.0 mm creepage/clearance and 5 kVRMS isolation rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side ground and power | Pins 1–8 form isolated input domain: GNDI (1), VDDI (2), PWM (3), DISABLE (4), NC (5–8) - require separate input-side supply and ground. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side power, ground, and drivers | Pins 9–16 form isolated output domain: GNDA (9), VDDA (10), VOA (11), GNDB (12), VDDB (13), VOB (14), NC (15–16) - support independent high-side and low-side gate supplies. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation | Eliminates LED aging and CMTI drift of optocouplers while delivering 5 kVRMS withstand and 45 kV/µs transient immunity. |
| PWM input with hysteresis | Single-input control simplifies MCU interface; 400 mV hysteresis ensures reliable operation in electrically noisy motor drive environments. |
| Programmable dead time | Hardware-configurable 70–900 ns dead time removes software dependency and guarantees shoot-through prevention during fault conditions. |
| Overlap protection logic | Automatically forces both outputs low when PWM and DISABLE are simultaneously asserted - failsafe response to invalid control states. |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: –40 to +125 °C), enabling use in traction inverters and onboard chargers. |
Applications
| Solar Inverters | Industrial Motor Drives |
|---|---|
Use Scenario: Half-bridge IGBT driving in string inverters with rapid MPPT transients and grid-synchronization demands. IC Role / Device Role / Timing Role: High-side/low-side isolated gate driver enforcing precise dead time and rejecting common-mode noise from transformer leakage and EMI filters. Use Value: 4.0 A peak current and 60 ns propagation delay enable <100 ns total bridge transition time, minimizing conduction losses at 16–20 kHz switching. | Use Scenario: Three-phase inverter for HVAC compressors and pump controllers operating in dusty, high-temperature enclosures. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation (600 VRMS working voltage) and thermal stability across –40 to +125 °C ambient. Use Value: AEC-Q100 qualification and 45 kV/µs CMTI ensure reliable commutation despite bus ripple and load-induced dV/dt spikes. |
| Plasma Display Power Supplies | Isolated DC-DC Converters |
Use Scenario: High-frequency resonant LLC converters powering plasma panel sustain electrodes with tight regulation and zero-voltage switching. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering matched rise/fall times (<12 ns) and minimal pulse-width distortion (<5.6 ns) for symmetrical ZVS control. Use Value: 8 MHz max switching frequency and 2.7 Ω source resistance support efficient 500–1000 kHz operation with low gate drive loss. | Use Scenario: 1 kW isolated flyback or forward converter in medical power supplies requiring reinforced insulation per IEC 60601-1. IC Role / Device Role / Timing Role: Safety-certified isolated driver enabling primary-side sensing and secondary-side synchronous rectification control across reinforced barrier. Use Value: UL1577, VDE 0884-5, and CSA 5A certifications validate 5 kVRMS isolation for patient-connected equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADuM4223BRIZ | 2.5 A peak output, 3.75 kVRMS isolation, fixed 100 ns dead time, no overlap protection | Limited to lower-power MOSFETs; lacks hardware-enforced shoot-through prevention | Select when cost sensitivity outweighs need for 4 A drive strength and programmable dead time. |
| UCC21540ADWKR | 4 A peak output, 5 kVRMS, dual-input (INH/INL), no PWM mode, 35 ns propagation delay | Requires two MCU pins instead of one PWM line; optimized for ultra-low delay but less flexible control interface | Select when lowest possible propagation skew is critical and dual-input control is acceptable. |
Compared with ADuM4223BRIZ and UCC21540ADWKR, the SI8234BD-C-ISR uniquely combines 4 A drive capability, single-PWM input simplicity, programmable dead time, and overlap protection - making it optimal for cost-constrained, safety-critical half-bridge designs where control pin count and hardware fault resilience matter.
Availability
SI8234BD-C-ISR is available at Aetrix Electronics and suitable for solar inverters, industrial motor drives, and isolated DC-DC power supplies requiring stable component supply, long-term lifecycle support, and certified 5 kVRMS isolation.
Supply support for SI8234BD-C-ISR 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
Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications markets.
The Si823x family was engineered to replace optocoupler-based gate drivers with higher reliability, tighter timing control, and integrated safety features - targeting high-efficiency power conversion in inverters, motor drives, and medical power systems.
FAQ
What is the maximum switching frequency supported by the SI8234BD-C-ISR?
The SI8234BD-C-ISR supports up to 8 MHz switching frequency, enabled by its ≤60 ns propagation delay, <12 ns rise/fall times (CL = 200 pF), and low pulse-width distortion (<5.6 ns). This allows clean square-wave gate drive for SiC MOSFETs and high-speed IGBTs in resonant and hard-switched topologies. The SI8234BD-C-ISR maintains timing integrity even under heavy capacitive loading due to its 4.0 A peak output capability.
Does the SI8234BD-C-ISR require external components for dead time configuration?
Yes - dead time is set externally using a single resistor (RDT) connected between the DT pin and VDDI. Values from 6 kΩ to 100 kΩ yield programmable dead times from 70 ns to 900 ns. No capacitor or additional logic is needed. This hardware-based approach ensures deterministic timing unaffected by MCU clock jitter or firmware delays, a key advantage of the SI8234BD-C-ISR over software-controlled alternatives.
What safety certifications apply to the SI8234BD-C-ISR?
The SI8234BD-C-ISR holds UL1577 (5000 Vrms, 1 min), VDE 0884-5 (IEC 60747-5-5), CSA Component Notice 5A (IEC 60950-1/61010-1/60601-1), and CQC GB4943.1 certifications. These validate its 5 kVRMS isolation rating, 600 VRMS reinforced working voltage, and suitability for medical, industrial, and solar applications. All certifications apply specifically to the WBSOIC-16 package variant of the SI8234BD-C-ISR.
Can the SI8234BD-C-ISR drive both N-channel and P-channel MOSFETs?
Yes - the SI8234BD-C-ISR's outputs are fully floating and can be referenced to either positive or negative voltages relative to their respective grounds (GNDA/GNDB). Its 4.0 A sink/source capability and rail-to-rail output swing (VDDA–0.04 V / 0.04 V) support direct drive of N-channel high-side switches (with bootstrap or isolated supply) and P-channel low-side switches. This flexibility is explicitly confirmed in the SI8234BD-C-ISR datasheet functional description.
How does the overlap protection feature work in the SI8234BD-C-ISR?
The SI8234BD-C-ISR's overlap protection forces both VOA and VOB low whenever the PWM input and DISABLE pin are simultaneously asserted - preventing shoot-through during invalid control states or fault recovery. Unlike software-based schemes, this is implemented in hardware within the isolation barrier, ensuring sub-microsecond response independent of MCU execution. This behavior is defined in the Si823x family truth table and applies identically across all SI8234BD-C-ISR units.
SI8234BD-C-ISR 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:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- 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:
- 9.4V ~ 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
SI8234BD-C-ISR FAQ
1.How can I place an order for SI8234BD-C-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BD-C-ISR 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 SI8234BD-C-ISR reliable?
The price and inventory of SI8234BD-C-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234BD-C-ISR is usually 5 days.
3.What payment methods are accepted for SI8234BD-C-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BD-C-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BD-C-ISR?
SI8234BD-C-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BD-C-ISR 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 SI8234BD-C-ISR?
For technical support, including SI8234BD-C-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BD-C-ISR requirements.
6.How does Aetrix verify that SI8234BD-C-ISR is sourced from the original manufacturer or authorized distributors?
All SI8234BD-C-ISR 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 SI8234BD-C-ISR meets industry standards.
7.What is the process for return or replacement of SI8234BD-C-ISR?
All SI8234BD-C-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BD-C-ISR, 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 SI8234BD-C-ISR part is unused and in its original packaging.
Return procedure for SI8234BD-C-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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