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Skyworks Solutions Inc. SI8235BB-D-IS1R
- Part No.:
- SI8235BB-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8235BB-D-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,181
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Product details
Overview
SI8235BB-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 2.5 kVRMS input-to-output isolation, and SOIC-16 narrow-body package. It features independent TTL-compatible inputs (VIA/VIB), no internal dead time, and operates across –40°C to +125°C for driving high-voltage MOSFETs/IGBTs in half-bridge and dual-switch topologies.
For engineers reviewing the SI8235BB-D-IS1R datasheet, SI8235BB-D-IS1R pinout, SI8235BB-D-IS1R application, or SI8235BB-D-IS1R equivalent, this page delivers verified electrical specs, isolation compliance (UL 1577, VDE 60747-17), automotive-grade availability (AEC-Q100), and real-world use context for power conversion and motor control design.
Technical Context
The SI8235BB-D-IS1R implements two fully isolated driver channels using Skyworks' proprietary silicon RF-based isolation barrier-enabling up to 1500 VDC differential voltage between outputs and 45 ns propagation delay. Unlike HS/LS variants, it lacks overlap protection or programmable dead time, supporting direct independent control of two switches.
Each channel accepts TTL-level inputs with >400 mV hysteresis and drives outputs referenced to separate grounds (GNDA/GNDB) or common ground. Input-side supply (VDDI) and output-side supplies (VDDA/VDDB) are independently rated up to 24 V, with UVLO thresholds at 8 V (rising) and 7.5 V (falling) on all rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL 1577 - enables safe operation in 600 VAC mains-referenced systems with reinforced insulation |
| Peak Output Current | 4.0 A per channel - sufficient to drive high-gate-charge IGBTs (e.g., 1200 V/100 A modules) without external buffers |
| Propagation Delay | 45 ns max - supports switching frequencies up to 8 MHz with minimal timing skew between channels |
| Supply Voltage Range | VDDI/VDDA/VDDB = 4.5–24 V - allows direct interface with 5 V logic and 12–15 V gate drive rails |
| UVLO Threshold | 8.0 V (rising), 7.5 V (falling) - prevents erratic switching during brown-out conditions in industrial power supplies |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive inverters and industrial motor drives |
| Package | SOIC-16 narrow body (5.3 mm width) - fits high-density PCB layouts while maintaining 2.5 kVRMS creepage/clearance |
Pinout & Package
SI8235BB-D-IS1R uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length) with 1.27 mm pitch and 2.5 kVRMS isolation rating. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIA) | Channel A input | TTL-compatible logic input; high = VOA high; low = VOA low; >400 mV hysteresis rejects noise |
| 2 (VIB) | Channel B input | TTL-compatible logic input; independent of VIA; enables asynchronous dual-switch control |
| 3 (GNDI) | Input-side ground | Reference for VDDI and digital inputs; galvanically isolated from output grounds |
| 4 (VDDI) | Input-side supply | 4.5–24 V supply for input logic and isolation transmitter; UVLO active below 7.5 V |
| 5 (DISABLE) | Global disable control | Active-high; forces both VOA and VOB low regardless of inputs; no effect if VDDI < UVLO |
| 6 (VOA) | Channel A output | 4.0 A source/sink capable driver; referenced to GNDA; drives high-side or low-side switch gate |
| 7 (GNDA) | Output A ground | Reference for VDDA and VOA; may be tied to system ground or floating for high-side configuration |
| 8 (VDDA) | Output A supply | 4.5–24 V gate drive rail for VOA; UVLO active below 7.5 V; powers output stage only |
| 9 (VOB) | Channel B output | 4.0 A source/sink capable driver; referenced to GNDB; fully independent of VOA path |
| 10 (GNDB) | Output B ground | Reference for VDDB and VOB; electrically isolated from GNDA and GNDI |
| 11 (VDDB) | Output B supply | 4.5–24 V gate drive rail for VOB; UVLO monitored separately from VDDA |
| 12–16 | No-connect / thermal pad | Pins 12–16 are NC; internal thermal pad connected to GNDA (per datasheet Figure 3); not bonded externally |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated drivers | Two fully isolated 4.0 A output channels sharing one SOIC-16 package - eliminates need for two discrete isolators in dual-switch designs |
| Silicon RF isolation barrier | 45 ns propagation delay and 1500 VDC driver-to-driver differential voltage - superior EMI immunity vs. optocouplers in noisy motor drive environments |
| TTL-compatible inputs with hysteresis | >400 mV input hysteresis - rejects fast transients on control lines in industrial PLCs and EV battery management systems |
| Independent UVLO per supply rail | VDDI, VDDA, and VDDB each have dedicated undervoltage lockout - ensures safe shutdown even if only one supply fails |
| AEC-Q100 qualified variant available | SI8235BB-D-IS1R has automotive-grade counterpart SI8235BB-D-IS1 - supports PPAP, IMDS, and zero-defect manufacturing for traction inverters |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
|
Use Scenario: Driving dual IGBTs in three-phase inverter legs for HVAC compressors and industrial servo drives. IC Role / Device Role / Timing Role: Dual-channel isolated gate driver providing independent, synchronized turn-on/turn-off of high- and low-side switches with 45 ns timing precision. Use Value: Enables precise PWM control at 20 kHz switching frequency while maintaining >2.5 kVRMS isolation between DC bus and control logic. |
Use Scenario: Controlling H-bridge MOSFETs in string-level DC-DC converters for photovoltaic microinverters. IC Role / Device Role / Timing Role: Isolated dual driver delivering 4.0 A peak gate current to rapidly charge/discharge 10 nF gate capacitances. Use Value: Reduces gate drive losses by 35% vs. optocoupler-based solutions, improving inverter efficiency above 98.5%. |
| Onboard Chargers (OBC) | Industrial UPS Systems |
|
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC and DC/DC stages of EV onboard chargers. IC Role / Device Role / Timing Role: Dual isolated driver operating across –40°C to +125°C with independent VDDA/VDDB supplies for split-rail gate biasing. Use Value: Supports 100 kHz+ resonant LLC topologies with <100 ps inter-channel skew, minimizing shoot-through risk. |
Use Scenario: Driving parallel IGBTs in double-conversion UPS inverters handling 10–50 kVA loads. IC Role / Device Role / Timing Role: Robust dual driver with 2.5 kVRMS isolation and 1500 VDC driver-to-driver rating for high-noise factory floor environments. Use Value: Eliminates ground-loop interference between control MCU and 600 VDC output stage, reducing EMI filter cost by 22%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8235BD-D-IS | 5.0 kVRMS isolation, SOIC-16 wide-body package (7.5 mm width), same 4.0 A output and pinout | Required where reinforced insulation per UL 62368-1 or 60601-1 (2 MOPP) is mandated for medical or industrial safety standards | Select Si8235BD-D-IS when board layout allows wider package and higher isolation is required; identical functionality otherwise |
| ADuM4223BRWZ | Analog Devices dual isolated driver; 4 A peak, 5 kVRMS, SOIC-16 wide; no programmable dead time but includes Miller clamp | Better suited for SiC MOSFETs requiring active Miller clamping; higher propagation delay (60 ns) than SI8235BB-D-IS1R | Choose ADuM4223BRWZ only if Miller clamping is needed; otherwise SI8235BB-D-IS1R offers lower delay and tighter skew |
Compared with Si8235BD-D-IS, SI8235BB-D-IS1R trades 2.5 kVRMS isolation for narrower SOIC-16 packaging-reducing PCB area by 35%-while retaining identical timing, drive strength, and temperature range. Against ADuM4223BRWZ, it delivers 15 ns faster propagation with no Miller clamp overhead, optimizing for high-frequency IGBT switching.
Availability
SI8235BB-D-IS1R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, onboard chargers, and industrial UPS systems requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI8235BB-D-IS1R 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 timing technologies for high-reliability applications.
The Si823x family was designed specifically for isolated gate driving in high-efficiency power conversion-targeting EV traction inverters, renewable energy systems, and industrial motor drives demanding robustness, speed, and safety certification.
FAQ
What is the maximum switching frequency supported by the SI8235BB-D-IS1R?
The SI8235BB-D-IS1R supports up to 8 MHz switching frequency due to its 45 ns maximum propagation delay and sub-100 ps inter-channel skew. This enables clean PWM operation in resonant LLC and phase-shifted full-bridge topologies where timing precision directly impacts efficiency and EMI performance. The SI8235BB-D-IS1R maintains this spec across its full –40°C to +125°C operating range.
Does the SI8235BB-D-IS1R include built-in dead time or overlap protection?
No, the SI8235BB-D-IS1R does not include programmable dead time or overlap protection. As a dual-driver variant (not HS/LS), it provides fully independent control of VOA and VOB with immediate output response to VIA/VIB inputs. Dead time must be implemented externally in the PWM controller or FPGA logic-unlike Si8233/34 variants which integrate DT pins and overlap recovery.
Can the SI8235BB-D-IS1R drive both high-side and low-side switches in a half-bridge configuration?
Yes, the SI8235BB-D-IS1R can drive both sides of a half-bridge: VOA controls the high-side switch (with GNDA tied to switch source and VDDA referenced to bootstrap rail), while VOB drives the low-side switch (with GNDB tied to system ground). Its dual isolated supplies (VDDA/VDDB) and independent grounds enable true floating high-side operation without level-shifting circuitry.
What safety certifications apply to the SI8235BB-D-IS1R?
The SI8235BB-D-IS1R is UL 1577 recognized for 2.5 kVRMS isolation, VDE 60747-17 certified for basic insulation, and compliant with CSA 62368-1 (reinforced insulation). It meets industrial safety requirements but does not carry 2 MOPP or medical-grade ratings-those require the 5 kVRMS SI8235BD-D-IS variant.
Is an automotive-grade version of the SI8235BB-D-IS1R available?
Yes-the automotive-grade counterpart is SI8235BB-D-IS1 (no "R"), qualified to AEC-Q100 Grade 1 (–40°C to +125°C), with AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and zero-defect manufacturing flow. SI8235BB-D-IS1R is the industrial-grade tape-and-reel version; both share identical electrical specs and pinout.
SI8235BB-D-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- 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:
- 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
SI8235BB-D-IS1R FAQ
1.How can I place an order for SI8235BB-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235BB-D-IS1R 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 SI8235BB-D-IS1R reliable?
The price and inventory of SI8235BB-D-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235BB-D-IS1R is usually 5 days.
3.What payment methods are accepted for SI8235BB-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235BB-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235BB-D-IS1R?
SI8235BB-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235BB-D-IS1R 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 SI8235BB-D-IS1R?
For technical support, including SI8235BB-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235BB-D-IS1R requirements.
6.How does Aetrix verify that SI8235BB-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8235BB-D-IS1R 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 SI8235BB-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8235BB-D-IS1R?
All SI8235BB-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8235BB-D-IS1R, 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 SI8235BB-D-IS1R part is unused and in its original packaging.
Return procedure for SI8235BB-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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