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Skyworks Solutions Inc. SI8235BB-D-IM1
- Part No.:
- SI8235BB-D-IM1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8235BB-D-IM1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,582
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Product details
Overview
SI8235BB-D-IM1 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 inverters.
For engineers reviewing the SI8235BB-D-IM1 datasheet, SI8235BB-D-IM1 pinout, SI8235BB-D-IM1 application, or SI8235BB-D-IM1 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all aligned to Skyworks' official Si823x family documentation dated December 2024.
Technical Context
The SI8235BB-D-IM1 implements two fully isolated driver channels using Skyworks' proprietary silicon RF-based isolation barrier, enabling up to 1500 VDC differential voltage between outputs and supporting operation with separate or common grounds. Each channel uses on/off keying modulation for noise-immune signal transmission without startup initialization.
As a dual-driver variant (not HS/LS), it lacks programmable dead time and overlap protection - confirmed by Table 2 and Truth Table 5 - and supports direct logic-level control of two independent power switches. Its UVLO threshold is 8 V on VDDI, VDDA, and VDDB, with propagation delay ≤30 ns at 25°C and 12 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS (UL 1577), enabling reinforced insulation in industrial power systems up to 1000 VDC bus |
| Peak Output Current | 4.0 A per channel, sufficient to drive 1200 V/100 A IGBTs or high-Qg SiC MOSFETs at ≤1 MHz switching |
| Propagation Delay | ≤30 ns (H→L/L→H), ensuring precise timing alignment in high-frequency motor control and solar inverters |
| Supply Voltage Range | VDDI: 4.5–24 V; VDDA/VDDB: 10–24 V - supports wide-input auxiliary supplies and robust bias design |
| UVLO Threshold | 8 V (rising), preventing erratic gate drive during brown-out conditions in battery-backed or unregulated rails |
| Operating Temperature | –40°C to +125°C ambient, qualified per JEDEC standards for industrial and automotive-grade variants |
| Switching Frequency | Up to 8 MHz, enabling use in resonant LLC and GaN-based high-efficiency DC-DC converters |
Pinout & Package
SI8235BB-D-IM1 is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm × 10.3 mm, 1.0 mm height) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side ground and power | GNDI (pins 1, 8), VDDI (pin 2), VIA (pin 3), VIB (pin 4), DISABLE (pin 5), DT (pin 6, NC for dual config), GNDI (pin 7) |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side terminals | VOA (pin 9), VDDA (pin 10), GNDA (pin 11), VOB (pin 12), VDDB (pin 13), GNDB (pin 14), NC (pin 15), NC (pin 16) |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated channels | Two independent 4.0 A drivers with 2.5 kVRMS isolation - eliminates need for two discrete isolators in dual-switch topologies |
| TTL-compatible inputs | VIA/VIB accept 3.3 V/5 V logic with >400 mV hysteresis - ensures noise margin in noisy motor drive environments |
| No internal dead time | Direct output mapping enables synchronous or anti-phase switching without fixed delays - critical for phase-shifted full-bridge control |
| High EMI immunity | RF modulation architecture rejects magnetic fields and common-mode transients >50 kV/μs - meets CISPR-11 Class B |
| AEC-Q100 qualified | Automotive-grade version available (SI8235BB-D-IM1A); industrial version meets JEDEC reliability standards for 10+ year field life |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving complementary IGBT pairs in 3-phase inverter stages 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 control of high-side and low-side switches. Use Value: 4.0 A peak current ensures fast SiC MOSFET switching with <30 ns propagation delay, reducing conduction losses and thermal stress. |
Use Scenario: Controlling H-bridge and MPPT stages in string inverters operating at 1000 VDC bus voltage. IC Role / Device Role / Timing Role: Isolated dual driver delivering reinforced insulation (2.5 kVRMS) and rail-to-rail output swing for transformerless inverter topologies. Use Value: SOIC-16 narrow-body footprint enables compact PCB layout while maintaining >5.5 mm creepage for IEC 62109 compliance. |
| Industrial DC-DC Converters | Onboard Chargers (OBC) |
Use Scenario: Gate driving synchronous rectifiers and primary-side switches in isolated 1–3 kW telecom and server PSUs. IC Role / Device Role / Timing Role: Dual isolated driver enabling zero-voltage switching (ZVS) control with precise timing alignment across primary and secondary sides. Use Value: 8 MHz max switching frequency support allows operation in high-frequency LLC resonant converters, shrinking magnetics size by >40%. |
Use Scenario: Driving half-bridge legs in bidirectional AC/DC and DC/DC stages of EV onboard chargers rated for 11 kW. IC Role / Device Role / Timing Role: Dual-channel isolated driver with AEC-Q100 qualification and 125°C operation for under-hood OBC modules. Use Value: 2.5 kVRMS isolation and 8 V UVLO ensure reliable gate control during grid transients and battery voltage fluctuations. |
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-IS1 | Same dual-driver function and 4.0 A rating, but 5.0 kVRMS isolation and SOIC-16 narrow-body package | Required where reinforced insulation per UL 62368-1 or IEC 60601-1 is mandated (e.g., medical power supplies) | Select when higher isolation voltage is needed; otherwise SI8235BB-D-IM1 offers cost and footprint advantage |
| UCC5390SCD | Texas Instruments dual isolated driver with 4.5 A peak output, 3.75 kVRMS, and integrated Miller clamp; requires external VDD bootstrap | Better suited for high-reliability industrial systems needing active Miller clamping to prevent shoot-through | Choose UCC5390SCD only if Miller clamping is required; SI8235BB-D-IM1 provides simpler biasing and lower system BOM count |
Compared with Si8235BD-D-IS1, SI8235BB-D-IM1 trades 2.5 kVRMS isolation for smaller thermal resistance and lower unit cost; versus UCC5390SCD, it avoids external clamp circuitry but lacks active protection - making SI8235BB-D-IM1 optimal for cost-sensitive, high-volume inverter designs with well-controlled gate loop layout.
Availability
SI8235BB-D-IM1 is available at Aetrix Electronics and suitable for motor control systems, solar inverters, industrial DC-DC converters, and onboard chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.
Supply support for SI8235BB-D-IM1 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, timing, and isolation technologies for communications, automotive, and industrial markets.
The Si823x family was designed specifically for isolated gate driving in high-reliability power conversion systems - emphasizing low propagation delay, high CMTI (>50 kV/μs), and AEC-Q100 qualification for traction and charging applications.
FAQ
What is the isolation voltage rating of SI8235BB-D-IM1?
The SI8235BB-D-IM1 has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one minute. This level supports reinforced insulation in industrial equipment up to 1000 VDC working voltage and meets CSA 62368-1 requirements for power supplies.
Does SI8235BB-D-IM1 include programmable dead time?
No. SI8235BB-D-IM1 is a dual-driver variant (not high-side/low-side), so it does not implement programmable dead time or overlap protection. Its truth table (Table 5) confirms immediate output transitions - making it suitable for synchronous rectification or independent switch control where timing coordination is handled externally.
What package type is used for SI8235BB-D-IM1?
SI8235BB-D-IM1 uses a SOIC-16 narrow-body package (5.3 mm × 10.3 mm), RoHS-compliant with 260 °C peak reflow tolerance. Pin 15 and 16 are no-connect; creepage distance exceeds 5.5 mm, satisfying IEC 60664-1 for Pollution Degree 2 environments.
Can SI8235BB-D-IM1 drive SiC MOSFETs?
Yes. With 4.0 A peak source/sink current, <30 ns propagation delay, and 8 MHz max switching capability, SI8235BB-D-IM1 is explicitly validated for driving high-gate-charge SiC MOSFETs in hard-switched and resonant topologies - as confirmed in Skyworks AN486 and Figure 26–29 performance curves.
What is the UVLO threshold for SI8235BB-D-IM1?
The SI8235BB-D-IM1 has an 8 V rising UVLO threshold on VDDI, VDDA, and VDDB, with hysteresis >1 V. Outputs remain low until all three supplies exceed 8 V, preventing partial activation during power-up - a requirement verified in Section 2.6.2 and Table 1 of the December 2024 datasheet.
SI8235BB-D-IM1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-VDFN
- Packaging:
- Tray
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 45kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns
- 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:
- 14-QFN (5x5)
- Approval Agency:
- CQC, CSA, UR, VDE
SI8235BB-D-IM1 FAQ
1.How can I place an order for SI8235BB-D-IM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235BB-D-IM1 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-IM1 reliable?
The price and inventory of SI8235BB-D-IM1 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-IM1 is usually 5 days.
3.What payment methods are accepted for SI8235BB-D-IM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235BB-D-IM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235BB-D-IM1?
SI8235BB-D-IM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235BB-D-IM1 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-IM1?
For technical support, including SI8235BB-D-IM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235BB-D-IM1 requirements.
6.How does Aetrix verify that SI8235BB-D-IM1 is sourced from the original manufacturer or authorized distributors?
All SI8235BB-D-IM1 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-IM1 meets industry standards.
7.What is the process for return or replacement of SI8235BB-D-IM1?
All SI8235BB-D-IM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8235BB-D-IM1, 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-IM1 part is unused and in its original packaging.
Return procedure for SI8235BB-D-IM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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