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Skyworks Solutions Inc. SI8235BA-AS1R
- Part No.:
- SI8235BA-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8235BA-AS1R.pdf
- Description:
- DGTL ISO 1KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,850
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Product details
Overview
SI8235BA-AS1R from Skyworks Solutions is an automotive-grade dual isolated gate driver IC with 4.0 A peak output current, 5.0 kVRMS input-to-output isolation, SOIC-16 narrow-body package, and TTL-compatible dual independent inputs (VIA/VIB). It drives high-side and low-side MOSFETs/IGBTs in half-bridge topologies for traction inverters and onboard chargers.
For engineers reviewing the SI8235BA-AS1R datasheet, SI8235BA-AS1R pinout, SI8235BA-AS1R application, or SI8235BA-AS1R equivalent, this page delivers verified specifications, automotive-qualified isolation performance, dual-driver timing behavior, and real-world use context for EV powertrain designs.
Technical Context
The SI8235BA-AS1R implements two fully isolated driver channels using Skyworks' proprietary silicon RF isolation barrier, enabling independent control of high-side and low-side switches without shared ground constraints. Each channel supports up to 1500 VDC driver-to-driver differential voltage and operates with 45 ns typical propagation delay.
It features TTL-level inputs with >400 mV hysteresis, 8 V undervoltage lockout (UVLO) threshold on all supply rails (VDDI, VDDA, VDDB), and operates across –40 °C to +125 °C. Unlike HS/LS variants, it lacks programmable dead time or overlap protection - outputs respond immediately to input transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVRMS per UL1577 - enables reinforced insulation in 400–800 Vdc bus systems |
| Peak Output Current | 4.0 A - drives gate capacitance up to ~20 nF at 100 kHz switching in IGBT/MOSFET half-bridges |
| Propagation Delay | 45 ns max - supports >8 MHz PWM operation with tight timing margins in fast-switching inverters |
| Supply Voltage Range | 4.5–24 V on VDDI/VDDA/VDDB - compatible with 12 V/15 V/24 V industrial and automotive auxiliary rails |
| UVLO Threshold | 8 V (rising), 7.2 V (falling) - prevents erratic switching during brown-out conditions in vehicle 12 V systems |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive applications per AEC-Q100 Grade 1 |
| Package | SOIC-16 narrow body - 10.3 mm × 7.5 mm footprint with 1.27 mm pitch, RoHS-compliant, 260 °C reflow rated |
Pinout & Package
SI8235BA-AS1R uses a 16-pin SOIC narrow-body package (7.5 mm width) with creepage/clearance optimized for 5.0 kVRMS isolation. Pin functions are validated per Skyworks Si823x datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Power for internal RF transmitter and logic; must be ≥8 V for reliable operation |
| GNDI | Input-side ground | Reference for VIA/VIB inputs and internal isolation barrier; separate from output grounds |
| VIA | Channel A input | TTL-compatible, >400 mV hysteresis; controls VOA directly with no dead time |
| VIB | Channel B input | TTL-compatible, >400 mV hysteresis; controls VOB directly with no dead time |
| DISABLE | Global shutdown | Active-high; forces both VOA and VOB low within tSD (≤100 ns); no effect if VDDI < UVLO |
| VDDA | Output A supply | Drives high-side switch; supports bootstrap or isolated supply up to 24 V |
| VOA | Output A driver | 4.0 A source/sink capable; connects to gate of high-side MOSFET/IGBT |
| GNDA | Output A ground | Return path for VOA; electrically isolated from GNDI and GNDB |
| VDDB | Output B supply | Drives low-side switch; typically tied to system ground or local 12–15 V rail |
| VOB | Output B driver | 4.0 A source/sink capable; connects to gate of low-side MOSFET/IGBT |
| GNDB | Output B ground | Return path for VOB; isolated from GNDI and GNDA; may tie to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated drivers | Two 4.0 A gate drivers with 5.0 kVRMS input-to-output and 1500 VDC driver-to-driver isolation - eliminates need for two discrete isolators in dual-switch topologies |
| Automotive qualification | AEC-Q100 Grade 1 qualified with AIAG-compliant PPAP, IMDS/CAMDS support - meets functional safety requirements for OBC and traction inverter control units |
| TTL-compatible inputs with hysteresis | >400 mV noise margin on VIA/VIB - rejects EMI in noisy 12 V vehicle environments without external Schmitt triggers |
| Fast, deterministic timing | 45 ns max propagation delay, ±5 ns channel-to-channel skew - enables precise synchronous switching in SiC/GaN-based inverters |
| Robust UVLO monitoring | Independent UVLO on VDDI, VDDA, VDDB with 8 V turn-on threshold - prevents partial drive and shoot-through during supply transients |
Applications
| Onboard Charger (OBC) | Traction Inverter Control |
|---|---|
Use Scenario: Isolated gate driving for bidirectional AC/DC and DC/DC stages in 11–22 kW EV onboard chargers. IC Role / Device Role / Timing Role: Dual driver provides independent control of high-side and low-side switches in interleaved totem-pole PFC and full-bridge DC/DC converters. Use Value: 5.0 kVRMS isolation meets reinforced insulation requirements for 1000 Vdc battery interfaces; 4.0 A output sustains 100+ kHz switching with SiC MOSFETs. |
Use Scenario: Gate driving for motor phase legs in 400 V and 800 V battery electric vehicle (BEV) traction inverters. IC Role / Device Role / Timing Role: Replaces optocoupler-based solutions with higher CMTI (>100 kV/µs), lower propagation delay, and tighter channel matching. Use Value: AEC-Q100 qualification ensures reliability in under-hood environments; SOIC-16 narrow-body fits space-constrained inverter gate driver PCB layouts. |
| Battery Management System (BMS) Active Balancing | Industrial Solar Inverter |
Use Scenario: High-voltage cell-balancing switches in modular lithium-ion battery packs (up to 900 V). IC Role / Device Role / Timing Role: Drives external N-channel MOSFETs in active balancing circuits requiring galvanic isolation between pack monitor MCU and HV switching nodes. Use Value: 1500 VDC driver-to-driver differential rating allows direct connection across series-connected cells; 4.0 A peak handles fast charge/discharge pulses. |
Use Scenario: Isolated gate drive for string-level DC/AC conversion in commercial rooftop solar inverters (600–1000 Vdc input). IC Role / Device Role / Timing Role: Controls IGBTs or SiC MOSFETs in three-phase NPC or T-type inverter topologies with split DC bus sensing. Use Value: 5.0 kVRMS isolation satisfies IEC 62109 and UL 1741 requirements; wide temperature range supports outdoor enclosure operation. |
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-AS1R | Same dual-driver function and 4.0 A output, but 8 V UVLO (vs. 5 V in AD variants); identical SOIC-16 narrow-body package and pinout | Designed for 12 V auxiliary supply systems; less suitable for 5 V logic-supplied control domains | Select SI8235BD-AS1R when VDDI is derived from regulated 12 V rail and higher UVLO margin is required |
| UCC5390SCDR | Texas Instruments dual-channel isolated driver; 4.0 A output, 5.7 kVRMS isolation, but only 3.3/5 V logic-compatible inputs (no TTL hysteresis) | Lacks automotive qualification; requires external level-shifting for 12 V MCU interfaces | Choose UCC5390SCDR only for non-automotive industrial inverters where TI ecosystem integration is prioritized over AEC-Q100 compliance |
Compared with SI8235BA-AS1R, SI8235BD-AS1R offers identical timing and isolation but targets higher-VDDI systems, while UCC5390SCDR trades automotive robustness for TI-specific feature sets and lower logic voltage compatibility - neither is pin-compatible, but both serve overlapping dual-driver use cases in high-reliability power conversion.
Availability
SI8235BA-AS1R is available at Aetrix Electronics and suitable for onboard chargers, traction inverters, and battery management systems requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8235BA-AS1R 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 robustness, low propagation delay, and AEC-Q100-compliant manufacturing flows.
FAQ
What is the isolation rating and certification status of the SI8235BA-AS1R?
The SI8235BA-AS1R provides 5.0 kVRMS input-to-output isolation per UL 1577, with CSA 62368-1 (reinforced insulation) and VDE 60747-17 (basic insulation) certifications. It is rated for 1500 VDC driver-to-driver differential voltage and supports reinforced insulation in 1000 Vdc systems per IEC 62109 and UL 1741 standards.
Does the SI8235BA-AS1R include programmable dead time or overlap protection?
No. The SI8235BA-AS1R is a dual-driver variant (not high-side/low-side), so it lacks programmable dead time and overlap protection circuitry. Its truth table (Table 5 in datasheet) confirms immediate output response to input transitions - VOA and VOB change state concurrently with VIA/VIB, with no intentional delay.
What are the UVLO thresholds for SI8235BA-AS1R on each supply rail?
The SI8235BA-AS1R has independent UVLO monitors: VDDI UVLO+ = 8.0 V, UVLO− = 7.2 V; VDDA UVLO+ = 8.0 V, UVLO− = 7.2 V; VDDB UVLO+ = 8.0 V, UVLO− = 7.2 V. All three rails must exceed 8.0 V to exit UVLO and enable normal output operation.
Can SI8235BA-AS1R drive both high-side and low-side switches in a half-bridge configuration?
Yes. SI8235BA-AS1R's dual isolated outputs (VOA and VOB) can independently drive high-side and low-side switches - VOA connects to the gate of the high-side device (e.g., via bootstrap or isolated supply), and VOB drives the low-side switch referenced to system ground. Its isolation barrier ensures safe operation across large common-mode voltage swings.
Is SI8235BA-AS1R pin-compatible with other Si823x variants like SI8235BD-AS1R?
Yes. SI8235BA-AS1R and SI8235BD-AS1R share identical SOIC-16 narrow-body packaging, pin assignment, and mechanical footprint. They differ only in UVLO threshold (both are 8 V) and automotive process flow - the "A" suffix denotes full AEC-Q100 automotive qualification with PPAP documentation, while "B" indicates industrial grade.
SI8235BA-AS1R 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:
- 1000Vrms
- 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
SI8235BA-AS1R FAQ
1.How can I place an order for SI8235BA-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235BA-AS1R 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 SI8235BA-AS1R reliable?
The price and inventory of SI8235BA-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235BA-AS1R is usually 5 days.
3.What payment methods are accepted for SI8235BA-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235BA-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235BA-AS1R?
SI8235BA-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235BA-AS1R 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 SI8235BA-AS1R?
For technical support, including SI8235BA-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235BA-AS1R requirements.
6.How does Aetrix verify that SI8235BA-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8235BA-AS1R 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 SI8235BA-AS1R meets industry standards.
7.What is the process for return or replacement of SI8235BA-AS1R?
All SI8235BA-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8235BA-AS1R, 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 SI8235BA-AS1R part is unused and in its original packaging.
Return procedure for SI8235BA-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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