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Skyworks Solutions Inc. SI8234BB-D-ISR
- Part No.:
- SI8234BB-D-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8234BB-D-ISR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,187
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Product details
Overview
SI8234BB-D-ISR 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 high-voltage power conversion systems such as solar inverters and onboard chargers.
For engineers reviewing the SI8234BB-D-ISR datasheet, SI8234BB-D-ISR pinout, SI8234BB-D-ISR application, or SI8234BB-D-ISR equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all grounded in Skyworks' official Si823x family documentation dated December 5, 2024.
Technical Context
The SI8234BB-D-ISR implements RF-based on/off keying across a semiconductor isolation barrier, delivering robust noise immunity and eliminating startup initialization requirements. Its dual-channel architecture supports independent high-side and low-side gate drive with integrated programmable dead time (via external resistor) and overlap protection to prevent shoot-through in bridge topologies.
It features TTL-compatible PWM input with >400 mV hysteresis, independent UVLO monitoring per side (8 V threshold), and operates up to 24 V supply voltage. Output drivers are rated for 4.0 A peak source/sink, enabling direct drive of medium-power MOSFETs without external buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation in 1000 VDC bus systems with reinforced insulation compliance |
| Peak Output Current | 4.0 A source/sink - drives gate capacitance of MOSFETs up to ~20 nF at 100 kHz switching without buffer stages |
| Propagation Delay | <45 ns - supports >8 MHz PWM frequencies with tight timing control in high-efficiency converters |
| UVLO Threshold | 8 V (VDDI, VDDA, VDDB) - ensures reliable turn-on only after stable bias rail establishment |
| Input Type | PWM single-input logic - simplifies controller interface by eliminating separate high/low-side signal routing |
| Package | SOIC-16 narrow body - RoHS-compliant, JEDEC-standard 260 °C reflow compatible footprint with 2.5 mm creepage |
| Operating Temp | –40 °C to +125 °C - qualified for automotive and industrial environments including traction inverter control |
Pinout & Package
SI8234BB-D-ISR uses a 16-pin SOIC narrow-body package (5.3 mm width) with gull-wing leads and 1.27 mm pitch. Pin functions are defined per Skyworks Si823x datasheet Figure 2 and Table 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides 4.5–24 V power to internal RF transmitter and logic; powers input die via internal diode if needed |
| GNDI | Input-side ground | Reference for PWM input and DISABLE; must be isolated from output grounds |
| PWM | Single logic input | TTL-compatible (≥2.0 V high), >400 mV hysteresis; controls complementary VOA/VOB outputs |
| DISABLE | Global shutdown control | Active-high input forcing both outputs low within tSD ≤ 100 ns; no effect if VDDI < UVLO |
| VDDA | High-side driver supply | Drives VOA output; UVLO monitors independently (8 V threshold); connects to bootstrap rail or isolated supply |
| GNDA | High-side driver ground | Reference for VOA; floats with high-side switch node; requires proper layout for dV/dt immunity |
| VOA | High-side gate output | 4.0 A capable source/sink; designed for direct connection to MOSFET gate with minimal trace inductance |
| VDDB | Low-side driver supply | Drives VOB output; UVLO monitored separately; typically tied to system ground-referenced 12–15 V rail |
| GNDB | Low-side driver ground | System ground reference for VOB; must be low-impedance path to minimize switching noise coupling |
| VOB | Low-side gate output | 4.0 A capable source/sink; complements VOA state with programmable dead time to prevent shoot-through |
| 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 |
|---|---|
| Dual isolated drivers in one package | Eliminates need for two discrete optocoupler+driver combos, reducing BOM count and PCB area by >40% |
| PWM input with overlap protection | Single-signal control of half-bridge with hardware-enforced dead time prevents shoot-through without MCU intervention |
| RF isolation technology | Superior CMTI (>100 kV/µs) vs. optocouplers; immune to LED aging, temperature drift, and magnetic field interference |
| Programmable dead time | External resistor sets precise delay (100 ns–1 µs range), enabling optimization for specific MOSFET gate charge and layout parasitics |
| AEC-Q100 qualified | Validated for automotive applications including OBCs and traction inverters with zero-defect manufacturing flow |
Applications
| Onboard Charger (OBC) | Solar Inverter DC-AC Stage |
|---|---|
|
Use Scenario: Isolated gate driving for bidirectional SiC MOSFET half-bridge in 3.3 kW AC/DC stage of EV onboard charger. IC Role / Device Role / Timing Role: SI8234BB-D-ISR provides synchronized high-side/low-side PWM control with programmable dead time to prevent shoot-through during 100 kHz switching. Use Value: 4.0 A drive strength enables direct SiC gate drive; 2.5 kVRMS isolation meets IEC 62109 creepage requirements for 400 V AC input systems. |
Use Scenario: Driving IGBTs in three-phase inverter stage of residential solar microinverter with 600 V DC link. IC Role / Device Role / Timing Role: SI8234BB-D-ISR serves as isolated half-bridge driver with UVLO monitoring on both sides to ensure safe startup under partial PV string illumination. Use Value: 45 ns propagation delay enables precise phase alignment across multiple channels; SOIC-16 narrow body fits dense inverter PCB layouts. |
| Industrial Motor Drive | Battery Management System (BMS) Active Balancing |
|
Use Scenario: Gate driving for 750 V IGBTs in 15 kW HVAC variable-frequency drive with regenerative braking. IC Role / Device Role / Timing Role: SI8234BB-D-ISR delivers high-current, low-latency gate signals while maintaining galvanic isolation between control logic and motor power stage. Use Value: 2.5 kVRMS withstand voltage exceeds EN 61800-5-1 requirements for 1000 V DC bus systems; -40 °C to +125 °C rating supports harsh factory environments. |
Use Scenario: Controlling external MOSFET switches in active cell-balancing circuits for 800 V battery packs in commercial EVs. IC Role / Device Role / Timing Role: SI8234BB-D-ISR isolates MCU GPIO from high-voltage battery strings and drives balancing FETs with fast, high-current pulses. Use Value: TTL-compatible PWM input simplifies MCU firmware; independent UVLO on VDDA/VDDB ensures safe disable during cell overvoltage events. |
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-D-IS | Same PWM-input HS/LS architecture, but 5.0 kVRMS isolation and SOIC-16 wide-body package (7.5 mm width) | Required for designs needing higher isolation (e.g., medical equipment, grid-tied inverters with 1500 VDC bus) | Select when 5.0 kVRMS is mandated by safety standards; wider package increases PCB area but improves creepage/clearance |
| UCC21540ADWKR | TI dual-channel isolated driver with 4-A peak, 5.7-kVRMS reinforced isolation, and split-output configuration (not PWM-input) | Requires two independent logic inputs; supports higher CMTI (150 kV/µs) and tighter propagation delay matching (±5 ns) | Choose for ultra-noisy environments or where independent high/low control is preferred over PWM simplicity |
Compared with Si8234BD-D-IS and UCC21540ADWKR, SI8234BB-D-ISR offers optimal cost and layout efficiency for 2.5 kVRMS-rated industrial and automotive applications where PWM-input simplicity and SOIC-16 narrow-body footprint are prioritized over maximum isolation or split-input flexibility.
Availability
SI8234BB-D-ISR is available at Aetrix Electronics and suitable for solar inverters, onboard chargers, and industrial motor drives requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for SI8234BB-D-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
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 power electronics, addressing limitations of optocouplers through RF-based silicon isolation, integrated dead time, and automotive-grade qualification.
FAQ
What is the isolation voltage rating of the SI8234BB-D-ISR?
The SI8234BB-D-ISR has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one-minute withstand testing. This rating applies to the SOIC-16 narrow-body package variant and supports designs compliant with IEC 62109 and EN 61800-5-1 for 1000 VDC bus systems. It is distinct from the 5.0 kVRMS versions like SI8234BD-D-IS.
Does the SI8234BB-D-ISR support programmable dead time?
Yes, the SI8234BB-D-ISR includes a dedicated DT pin that accepts an external resistor to ground, allowing dead time to be set from approximately 100 ns to 1 µs using the formula DT ≈ 10 × RDT (ns). Floating the DT pin yields ~400 ps nominal dead time. This feature is integral to preventing shoot-through in half-bridge configurations driven by the SI8234BB-D-ISR.
What is the function of the DISABLE pin on the SI8234BB-D-ISR?
The DISABLE pin on the SI8234BB-D-ISR is an active-high control that forces both VOA and VOB outputs low within ≤100 ns, regardless of PWM input state. It remains effective only when VDDI is above its 8 V UVLO threshold. This pin enables rapid, hardware-level fault shutdown in overcurrent or overtemperature conditions, making it critical for functional safety in automotive and industrial systems using the SI8234BB-D-ISR.
Can the SI8234BB-D-ISR drive SiC MOSFETs directly?
Yes, the SI8234BB-D-ISR's 4.0 A peak source/sink capability and 45 ns propagation delay enable direct gate driving of common 650 V and 1200 V SiC MOSFETs with Qg ≤ 20 nF. Its high CMTI (>100 kV/µs) and fast edge rates reduce gate ringing risk. Layout best practices - including short gate traces and local 100 nF decoupling at VDDA/VDDB - are recommended to maximize performance with the SI8234BB-D-ISR.
Is the SI8234BB-D-ISR qualified for automotive applications?
Yes, the SI8234BB-D-ISR is AEC-Q100 qualified and available in automotive-grade variants (e.g., SI8234BB-D-AS). It is manufactured using automotive-specific process flows, supports AIAG-compliant PPAP documentation, and is listed in IMDS/CAMDS. The SI8234BB-D-ISR is deployed in production automotive systems including onboard chargers and battery management units.
SI8234BB-D-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:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- 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
SI8234BB-D-ISR FAQ
1.How can I place an order for SI8234BB-D-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BB-D-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 SI8234BB-D-ISR reliable?
The price and inventory of SI8234BB-D-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234BB-D-ISR is usually 5 days.
3.What payment methods are accepted for SI8234BB-D-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BB-D-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BB-D-ISR?
SI8234BB-D-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BB-D-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 SI8234BB-D-ISR?
For technical support, including SI8234BB-D-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BB-D-ISR requirements.
6.How does Aetrix verify that SI8234BB-D-ISR is sourced from the original manufacturer or authorized distributors?
All SI8234BB-D-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 SI8234BB-D-ISR meets industry standards.
7.What is the process for return or replacement of SI8234BB-D-ISR?
All SI8234BB-D-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BB-D-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 SI8234BB-D-ISR part is unused and in its original packaging.
Return procedure for SI8234BB-D-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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