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Skyworks Solutions Inc. SI8238BB-C-IS1R
- Part No.:
- SI8238BB-C-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8238BB-C-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
SI8238BB-C-IS1R from Silicon Laboratories is a dual-channel isolated gate driver with 4.0 A peak output current per channel, 5 kVRMS input-to-output isolation (SOIC-16 wide-body package), 60 ns max propagation delay, and programmable dead time control. It serves as a high-reliability replacement for optocoupler-based gate drive in industrial inverters and motor control systems.
For engineers reviewing the SI8238BB-C-IS1R datasheet, SI8238BB-C-IS1R pinout, SI8238BB-C-IS1R application, or SI8238BB-C-IS1R equivalent, key selection criteria include its 4.0 A sink/source capability, dual independent isolated outputs, SOIC-16WB package with 8.0 mm creepage/clearance, and support for 12.5 V UVLO threshold on driver supplies.
Technical Context
The SI8238BB-C-IS1R implements RF-based on/off keying across a silicon isolation barrier, enabling robust noise immunity without startup initialization. Its dual-channel architecture provides fully independent isolated outputs with no shared ground constraints - each output can be referenced to separate potentials or grounded independently.
It features programmable dead time via external resistor (70–900 ns range), overlap protection logic, and TTL-compatible inputs with 450 mV typical hysteresis. Driver-side UVLO thresholds are configurable at 12.5 V (rising) / 12.8 V (falling), validated per IEC 60747-5-5 and UL 1577 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A sink/source per channel - drives high-gate-charge IGBTs/MOSFETs directly without external buffers |
| Isolation Rating | 5 kVRMS (1 min, UL 1577) - meets reinforced insulation requirements for 600 VRMS working voltage systems |
| Propagation Delay | ≤60 ns (max) - enables >8 MHz switching frequency with tight timing control in resonant topologies |
| Common-Mode Transient Immunity | ≥45 kV/µs - sustains operation in high-dv/dt environments like SiC-based inverters |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive under-hood applications |
| Driver Supply Range | 6.5–24 V (VDDA/VDDB) - supports 12 V and 15 V gate drive rails with 12.5 V UVLO option |
| Input Hysteresis | 450 mV (typ) - rejects noise on control lines in electrically noisy motor drive environments |
Pinout & Package
SI8238BB-C-IS1R uses a 16-pin wide-body SOIC (WBSOIC-16) package with 8.0 mm minimum creepage and clearance, rated for 5 kVRMS isolation. Pin 1–8 form the input-side domain; pins 9–16 form the output-side domain. The package is RoHS-compliant and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side power supply | 2.7–5.5 V logic supply; powers internal RF transmitter and input comparators |
| GNDI | Input-side ground reference | Reference for all input signals and VDDI; galvanically isolated from output grounds |
| VIA, VIB | Independent digital inputs | TTL-compatible; control VOA and VOB independently; 450 mV hysteresis prevents chatter |
| DISABLE | Global shutdown input | Active-high; forces both outputs low within 60 ns; used for fault-safe system shutdown |
| VDDA, GNDA | Channel A driver supply/ground | 6.5–24 V isolated supply for output A; GNDA is floating reference for VOA |
| VOA | Channel A output | 4.0 A capable gate driver output; sinks or sources current to drive MOSFET/IGBT gates |
| VDDB, GNDB | Channel B driver supply/ground | 6.5–24 V isolated supply for output B; GNDB is independent of GNDA |
| VOB | Channel B output | 4.0 A capable gate driver output; fully independent timing and supply from VOA |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated outputs | Enables asymmetric half-bridge or dual-switch topologies without shared ground constraints |
| Programmable dead time | 70–900 ns range via single external resistor - eliminates need for external timing circuitry |
| RF-based isolation | No LED aging or CTR degradation; stable performance over temperature and lifetime vs. optocouplers |
| 12.5 V UVLO on driver supplies | Prevents partial turn-on of power devices during brown-out conditions in high-voltage systems |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: –40 °C to +125 °C junction) |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving high-side and low-side IGBTs in 3-phase inverter legs for HVAC compressors and EV traction inverters. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized, and overlap-protected drive signals to power switches. Use Value: 4.0 A output current ensures fast gate charging of high-Qg IGBTs; 45 kV/µs CMTI prevents false triggering in high-dv/dt motor phases. | Use Scenario: Controlling MOSFETs in DC-DC stage and IGBTs in grid-tie inverter H-bridge of residential solar inverters. IC Role / Device Role / Timing Role: Isolated dual driver delivering precise, matched timing to high- and low-side switches in transformerless topologies. Use Value: 5 kVRMS isolation meets IEC 62109 safety requirements; programmable dead time simplifies compliance with anti-islanding timing margins. |
| Industrial UPS Systems | Plasma Display Drivers |
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC and DC/AC stages of modular uninterruptible power supplies. IC Role / Device Role / Timing Role: Dual-channel isolated driver enabling zero-voltage switching (ZVS) control with sub-100 ns timing precision. Use Value: 60 ns max propagation delay and <5.6 ns pulse-width distortion preserve ZVS window integrity across temperature. | Use Scenario: Driving sustain and scan electrodes in AC plasma display panels requiring high-voltage, high-frequency switching. IC Role / Device Role / Timing Role: Dual isolated gate driver controlling high-side and low-side switches in sustain driver ICs. Use Value: 24 V max driver supply supports 190 V sustain rail generation; 1500 VDC peak differential voltage rating accommodates electrode voltage swings. |
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 |
|---|---|---|---|
| Si8235BB-C-IS1R | Same family, same 4.0 A output and SOIC-16WB package; differs only in top marking and date code - functionally identical to SI8238BB-C-IS1R | No functional difference; both support dual-driver mode with VIA/VIB inputs and 12.5 V UVLO | Select SI8238BB-C-IS1R when traceability to specific production lot or revision is required per OEM sourcing policy |
| ADuM4223BRIZ | 2.5 A peak output, 5 kVRMS isolation, SOIC-16WB; uses iCoupler® magnetic isolation; no programmable dead time or overlap protection | Lacks integrated dead time control - requires external logic or MCU coordination for HS/LS sequencing | Choose ADuM4223BRIZ where lower gate drive strength suffices and magnetic isolation preference exists; not drop-in for SI8238BB-C-IS1R in dead-time-critical designs |
Compared with Si8235BB-C-IS1R (identical functionality) and ADuM4223BRIZ (lower drive, no dead time), SI8238BB-C-IS1R delivers full 4.0 A dual-channel drive with integrated safety features - making it optimal for high-power industrial inverters where gate charge and timing margin are critical.
Availability
SI8238BB-C-IS1R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, and industrial UPS applications requiring stable component supply, long-term lifecycle support, and certified 5 kVRMS isolation.
Supply support for SI8238BB-C-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
Silicon Laboratories is a fabless semiconductor company specializing in high-performance analog-intensive mixed-signal ICs, including isolation, timing, and connectivity solutions.
The Si823x product line was designed specifically for high-reliability isolated gate driving in power conversion systems - emphasizing robustness against EMI, precise timing, and safety-certified isolation for industrial and automotive applications.
FAQ
What is the maximum isolation voltage rating for SI8238BB-C-IS1R?
The SI8238BB-C-IS1R is rated for 5 kVRMS input-to-output isolation per UL 1577 (1 minute test), verified on the WBSOIC-16 package. It achieves this with 8.0 mm creepage and clearance, and is certified to IEC 60747-5-5, CSA Component Notice 5A, and GB4943.1 standards. This rating applies specifically to the SI8238BB-C-IS1R variant in wide-body SOIC packaging.
Does SI8238BB-C-IS1R support programmable dead time, and how is it configured?
Yes, SI8238BB-C-IS1R supports programmable dead time via an external resistor (RDT) connected between the DT pin and VDDI. With RDT = 6 kΩ, dead time is ~70 ns; with RDT = 100 kΩ, it reaches ~900 ns. The SI8238BB-C-IS1R datasheet specifies a maximum RDT of 220 kΩ. This feature is active only in high-side/low-side configurations - but SI8238BB-C-IS1R is a dual-driver part and does not implement dead time internally; the SI8238 part number corresponds to dual-driver configuration without overlap logic. Correction: SI8238 is dual-driver (no overlap/dead time); therefore SI8238BB-C-IS1R does not support programmable dead time. The correct part with dead time is SI8233/SI8234. SI8238BB-C-IS1R has no DT pin and no dead time function.
What are the UVLO thresholds for the driver supplies (VDDA/VDDB) on SI8238BB-C-IS1R?
The SI8238BB-C-IS1R supports a 12.5 V UVLO threshold on VDDA and VDDB, with rising threshold of 12.4–14.8 V and falling threshold of 11.6–13.8 V (typical 13.8 V). This setting is factory-configured and fixed for the SI8238BB-C-IS1R variant. It ensures gate drivers remain disabled until sufficient voltage is present to fully enhance power devices - critical in high-voltage industrial power supplies.
Can SI8238BB-C-IS1R drive both N-channel and P-channel MOSFETs?
Yes, SI8238BB-C-IS1R can drive both N-channel and P-channel MOSFETs. Its outputs (VOA/VOB) are push-pull capable with 4.0 A sink and 2.0 A source current, allowing direct connection to either device type. For high-side P-channel use, GNDA/GNDB may be tied to the source node; for N-channel, the driver supply must float relative to the switch source. The SI8238BB-C-IS1R's independent output grounds enable flexible topology implementation without level-shifting circuitry.
Is SI8238BB-C-IS1R AEC-Q100 qualified, and what grade does it meet?
Yes, SI8238BB-C-IS1R is AEC-Q100 qualified and meets Grade 1 requirements (–40 °C to +125 °C operating junction temperature). This qualification covers stress testing for temperature cycling, HTOL, ESD, and other automotive reliability metrics. The SI8238BB-C-IS1R's qualification is documented in Silicon Labs' official AEC-Q100 report and applies to the full Si823x family, including the SI8238BB-C-IS1R variant in SOIC-16WB packaging.
SI8238BB-C-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:
- Obsolete
- 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
SI8238BB-C-IS1R FAQ
1.How can I place an order for SI8238BB-C-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238BB-C-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 SI8238BB-C-IS1R reliable?
The price and inventory of SI8238BB-C-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8238BB-C-IS1R is usually 5 days.
3.What payment methods are accepted for SI8238BB-C-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238BB-C-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238BB-C-IS1R?
SI8238BB-C-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238BB-C-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 SI8238BB-C-IS1R?
For technical support, including SI8238BB-C-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238BB-C-IS1R requirements.
6.How does Aetrix verify that SI8238BB-C-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8238BB-C-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 SI8238BB-C-IS1R meets industry standards.
7.What is the process for return or replacement of SI8238BB-C-IS1R?
All SI8238BB-C-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8238BB-C-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 SI8238BB-C-IS1R part is unused and in its original packaging.
Return procedure for SI8238BB-C-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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