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Skyworks Solutions Inc. SI8235BB-ASR
- Part No.:
- SI8235BB-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8235BB-ASR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
SI8235BB-ASR 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-side/low-side MOSFETs or IGBTs in half-bridge topologies.
For engineers reviewing the SI8235BB-ASR datasheet, SI8235BB-ASR pinout, SI8235BB-ASR application, or SI8235BB-ASR equivalent, this page delivers verified specifications, automotive-grade qualification status (AEC-Q100), isolation barrier performance, UVLO thresholds, and dual-driver timing behavior - all critical for motor control, solar inverters, and onboard charger designs requiring reinforced insulation and robust EMI immunity.
Technical Context
The SI8235BB-ASR implements two fully isolated driver channels using Skyworks' proprietary silicon RF-based isolation barrier, delivering 45 ns typical propagation delay and supporting up to 8 MHz switching frequency. Each channel operates independently with separate VDDA/VDDB supplies and ground domains, enabling floating high-side and low-side gate drive without shared reference constraints.
It uses on/off keying modulation for noise-immune signal transmission across the isolation barrier and includes undervoltage lockout (UVLO) on both input (VDDI) and output (VDDA/VDDB) sides, with 8 V turn-on threshold and hysteresis to prevent chatter during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation in 600 VAC mains-referenced systems with reinforced insulation compliance per IEC 62368-1 |
| Peak Output Current | 4.0 A per channel - sufficient to drive 1200 V SiC MOSFETs or 650 V IGBTs with fast turn-on/turn-off in high-frequency converters |
| Propagation Delay | 45 ns max - supports precise timing alignment in >500 kHz PWM applications without external delay compensation |
| UVLO Threshold | 8 V (rising), 7.2 V (falling) on VDDI/VDDA/VDDB - ensures clean startup/shutdown and prevents partial conduction during supply ramp-up |
| Operating Temperature | –40°C to +125°C - validated for under-hood automotive environments and industrial power modules |
| Supply Voltage Range | VDDI: 4.5–24 V; VDDA/VDDB: 10–24 V - accommodates wide-input auxiliary supplies and battery-derived rails |
| Input Logic Type | TTL-compatible with >400 mV hysteresis - rejects noise in noisy motor drive or inverter control environments |
Pinout & Package
SI8235BB-ASR is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width), optimized for high-density PCB layouts while maintaining 2.5 kVRMS isolation and creepage ≥5.5 mm between input and output sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side power supply | Supplies isolated input logic and RF transmitter; must be ≥4.5 V for reliable operation |
| GNDI | Input-side ground reference | Reference for VIA, VIB, and DISABLE; electrically isolated from output grounds |
| VIA | Channel A input | TTL-compatible high-true logic input controlling VOA; drives high when VIH ≥2.0 V |
| VIB | Channel B input | TTL-compatible high-true logic input controlling VOB; independent of VIA with no cross-coupling |
| DISABLE | Global output disable | Active-high signal forcing both VOA and VOB low regardless of input states; requires VDDI > UVLO to activate |
| VDDA | Output A power supply | Drives high-side or low-side gate; supports 10–24 V for optimal 4.0 A sourcing/sinking capability |
| GNDA | Output A ground | Return path for VOA; may be connected to system high-side or low-side ground depending on topology |
| VOA | Channel A output | 4.0 A capable gate driver output; sourced/sunk relative to GNDA and VDDA |
| VDDB | Output B power supply | Independent supply for Channel B; enables split-rail or floating configurations |
| GNDB | Output B ground | Return path for VOB; galvanically isolated from GNDA and GNDI |
| VOB | Channel B output | 4.0 A capable gate driver output; fully decoupled from VOA timing and supply domain |
| NC | No connect | Pins 1, 15, and 16 are internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated drivers | Enables full-bridge or dual half-bridge control without inter-channel timing coupling or shared supply dependencies |
| 2.5 kVRMS isolation rating | Meets reinforced insulation requirements for IEC 62368-1 and 60601-1 (2 MOPP), suitable for medical and EV charging applications |
| AEC-Q100 qualified (Grade 1) | Validated for automotive use including onboard chargers and traction inverters with zero-defect manufacturing flow |
| 45 ns propagation delay | Reduces timing skew between channels, enabling precise synchronous switching in high-efficiency SiC/GaN converters |
| TTL inputs with 400 mV hysteresis | Rejects common-mode noise up to ±1 kV/µs dV/dt, eliminating need for external Schmitt triggers in noisy EMI environments |
| SOIC-16 narrow-body package | Reduces PCB footprint by 30% vs. wide-body variants while maintaining creepage and thermal performance for compact power modules |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving high-side and low-side IGBTs in three-phase inverter stages for HVAC compressors and industrial servo drives. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized control of upper/lower switches with no overlap risk due to absence of internal dead time. Use Value: Enables precise PWM edge placement at 20–50 kHz with <50 ns channel-to-channel skew, reducing switching losses and improving torque ripple suppression. | Use Scenario: Controlling MOSFET half-bridges in string-level DC-DC optimizers and central inverters handling 1000 V DC input. IC Role / Device Role / Timing Role: Isolated dual driver delivering 4.0 A peak current to switch 650 V SiC MOSFETs at 100+ kHz with reinforced insulation for grid-tied safety compliance. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification support long-term reliability in outdoor PV installations with wide temperature cycling and humidity exposure. |
| Onboard Chargers (OBC) | Battery Management Systems (BMS) |
Use Scenario: Gate driving AC/DC PFC and DC/DC LLC stages in 11 kW bidirectional OBCs for BEVs. IC Role / Device Role / Timing Role: Dual-channel isolated driver powering high-side and low-side GaN FETs with independent VDDA/VDDB supplies for adaptive voltage scaling. Use Value: 45 ns propagation delay and 8 V UVLO ensure clean startup sequencing and fault-free operation during rapid AC line transients and battery voltage dips. | Use Scenario: Isolating gate drive signals between microcontroller and high-voltage cell-balancing FETs in modular battery packs. IC Role / Device Role / Timing Role: Provides galvanic separation between MCU logic domain and 400–800 V battery stack, preventing ground loop interference and enabling safe hot-swap diagnostics. Use Value: SOIC-16 narrow-body footprint allows integration into space-constrained BMS controller boards while meeting IEC 61000-4-5 surge immunity requirements. |
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-ASR | 5.0 kVRMS isolation, SOIC-16 wide-body package, same 4.0 A output and pinout | Required where higher isolation (e.g., medical, industrial mains-connected equipment) mandates 5 kVRMS over 2.5 kVRMS | Select Si8235BD-ASR when system-level safety standards require enhanced creepage/clearance beyond 2.5 kVRMS |
| UCC5390SCD | TI part with integrated Miller clamp, 5.7 kVRMS, but single-channel; requires two units for dual function | Used in ultra-high-reliability server PSUs where active Miller clamping is mandatory to prevent shoot-through | Choose UCC5390SCD only if Miller clamping is required and board area permits dual-device layout |
Compared with SI8235BB-ASR, Si8235BD-ASR offers higher isolation for safety-critical systems but increases PCB area, while UCC5390SCD adds protection features at the cost of channel count and design complexity - making SI8235BB-ASR optimal for cost-sensitive, space-constrained dual-drive applications needing proven automotive qualification and minimal external components.
Availability
SI8235BB-ASR is available at Aetrix Electronics and suitable for motor control systems, solar inverters, onboard chargers, and battery management systems requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8235BB-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 high-reliability isolated gate driving in automotive electrification and industrial power conversion, emphasizing AEC-Q100 qualification, RF-based isolation robustness, and flexible dual-channel architecture for half-bridge and full-bridge topologies.
FAQ
What is the isolation voltage rating of the SI8235BB-ASR?
The SI8235BB-ASR has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one minute. This meets reinforced insulation requirements per IEC 62368-1 and supports safe operation in 600 VAC mains-referenced systems. The isolation barrier uses Skyworks' proprietary silicon RF technology, not optocoupler-based construction.
Does the SI8235BB-ASR include built-in dead time control?
No, the SI8235BB-ASR does not include programmable dead time - it is a dual-driver variant (not high-side/low-side), so overlap protection and DT control are absent. Dead time must be implemented externally in the PWM controller. This differs from Si8233/34 variants, which integrate DT pins and overlap logic for half-bridge use.
Is the SI8235BB-ASR qualified for automotive applications?
Yes, the SI8235BB-ASR is an automotive-grade device, indicated by the "-ASR" suffix and AEC-Q100 Grade 1 qualification (–40°C to +125°C). It is manufactured using automotive-specific process flows, supported by AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect methodology throughout production.
What are the UVLO thresholds for the SI8235BB-ASR?
The SI8235BB-ASR features independent UVLO on all supply domains: VDDI, VDDA, and VDDB each have a turn-on threshold of 8.0 V and turn-off threshold of 7.2 V (0.8 V hysteresis). Outputs remain low until all enabled supplies exceed their respective UVLO+, ensuring glitch-free startup in multi-rail systems.
Can the SI8235BB-ASR drive both high-side and low-side switches simultaneously?
Yes - the SI8235BB-ASR's two fully independent isolated channels allow simultaneous, asynchronous control of high-side and low-side switches. VOA and VOB operate with separate VDDA/VDDB supplies and ground domains, enabling true floating high-side drive without bootstrap limitations or timing interdependence.
SI8235BB-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
SI8235BB-ASR FAQ
1.How can I place an order for SI8235BB-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235BB-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 SI8235BB-ASR reliable?
The price and inventory of SI8235BB-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235BB-ASR is usually 5 days.
3.What payment methods are accepted for SI8235BB-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235BB-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235BB-ASR?
SI8235BB-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235BB-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 SI8235BB-ASR?
For technical support, including SI8235BB-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235BB-ASR requirements.
6.How does Aetrix verify that SI8235BB-ASR is sourced from the original manufacturer or authorized distributors?
All SI8235BB-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 SI8235BB-ASR meets industry standards.
7.What is the process for return or replacement of SI8235BB-ASR?
All SI8235BB-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8235BB-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 SI8235BB-ASR part is unused and in its original packaging.
Return procedure for SI8235BB-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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